nvl and nvl2 w3schools

Data type must match with each other i.e. Corona and the BAU value, This blog contains advertising and affiliate products as well as affiliate links, which are usually marked as advertising. It shows the date of 1 Jan 2000 if a NULL value is found. With the following data in Employees (last_name, commission_pct, manager_id) what is the result of the following statement? nvl2() -- CASE hi tom,i see the function nvl2().but its give me result when there is value is null i.e. NVL only checks and analyzes the first expression. Example 1: NVL2 (NULL, 1, 2); Result: 2. Syntax NVL2 (expr1,expr2,expr3) Contents Syntax Description Examples See Also Description The NVL2 function returns a value based on whether a specified expression is NULL or not. If expr1 is NULL, this expression will be evaluated and ; expr3: An expression that shares a least common type with expr2. select NVL2 (supplier_city, 'Completed', 'n/a') from suppliers; The SQL statement above would return 'n/a' if the supplier_city field contained a null value. The Oracle NVL function can use string, date, and number values, for both the check_value and replace_value. You can see there is one record with a fees_paid value of NULL. If expr1 is not null, then NVL2 returns expr2. That is, NVL2 returns expr2 if expr1 is not null. Following is the Redshift NVL2 syntax: NVL (exp, replacement-exp1,replacement-exp1); Redshift NVL2 takes three parameters. If expr1 is null, then NVL returns expr2 . If all expressions are null, the result is null. This function returns the first argument if it is not null, otherwise the second argument. What is the difference between nvl and nvl2? If youre likely to move to a non-Oracle system, then use NVL (possible with a CASE statement). Syntax NVL2( <expr1> , <expr2> , <expr3> ) Arguments expr1 The expression to be checked to see whether it is NULL. The first expression in NVL2 is never returned, it is only used to determine whether expression2 must be returned, or expression3. Get my book: Beginning Oracle SQL for Oracle Database 18c, Copyright 2022 Database Star | Powered by Astra WordPress Theme. expr2 NVL2 lets you determine the value returned by a query based on whether a specified expression is null or not null. NVL does a implicit datatype conversion based on the first argument given to it. Lets see how the NANVL function works with each of the values in the table when translating to 0. First, the check_value is entered. In this scenario we will try to replace the age of the employees which are null with zero so that the null values in age column of the employee table are replaced with the number zero. If the first argument is not null, then it returns the second argument. The NVL2works like IF statement. The NVL2 is equivalent to IF statements found in the database such as SQL Server and Azure Synapse. The NVL2 function returns the second expression if the first expression is not null. its value will be returned. Current price $95.00 . its value will be returned. The NVL2 is equivalent to IF statements found in the database such as SQL Server and Azure Synapse. You can use the NVL function to convert an expression that evaluates to NULL to a value that you specify. E.g Nvl(columnname, 'NA')- null value be replaced as NA used in oracle isnull - replaces null value . The functions for handling null values that I have learned in SQL Oracle are NVL, NVL2, NULLIF and COALESCE. If you need an IF THEN ELSE syntax and just need to check for a NULL value, use NVL2. The NLV2 function was introduced in MariaDB 10.3.0. LNNVL (Oracle) NVL2 allows you to specify a value to check, and then specify a value to use if it is null, as well as a value to use if it is not null. Compatibility: Oracle and IBM DB2. So, that's how to use the NVL and NVL2 functions in Oracle. The nvl2 like like combining an nvl with a decode because you can transform a value:. This allows us to specify a different value to return in the . NVL returns the replacement string when the base expression is null, and the value of the base expression when it is not null. The difference between the SQL functions NVL and NVL2 is, that when using the function NVL2 you can set different values for NULL and NOT NULL. Alphabetic list of built-in functions. ; Returns. The arguments expr1 and expr2 can have any datatype. Syntax: NVL (value, replace_with) Parameters: NVL evaluates both the arguments and COALESCE stops at first occurrence of a non-Null value. If the expression is NOT NULL, the function outputs the value of the field. Nvl(arg1,arg2) nvl is used for converting null values. In this article, we will check couple of NULL handling functions such as Redshift NVL and NVL2 functions in details with syntax, usage and few examples. If you want to see all rows where the fees_paid is less than 100, and including those where fees_paid is NULL, you can use this query: You can see it now shows the records where fees_paid is NULL. NVL only checks and analyzes the first expression. So, your choice will depend on what you need the function for and how much you need it to do. Provisionen daraus haben keinen Einfluss auf meine Meinungsuerung. Yes, you can, as long as both the check_value and replace_value are the same. If expr1 is not null, then NVL2 returns expr2. This website uses cookies to ensure you get the best experience on our website. Employee_check shows two different text values, depending on the value of the employees column. SQL Server. The Redshift NVL function substitutes a NULL value with a string that users supply as an argument to the Redshift NVL function. COALESCE is a standard SQL function, and also has a bit more functionality. These functions are mainly used to handle the null values in Redshift tables. These functions work with any data type. nvl function - Azure Databricks - Databricks SQL | Microsoft Learn Learn Documentation Training Certifications Q&A Shows Events Sign in Azure Product documentation Architecture Learn Azure Develop Resources Portal Free account Azure Databricks Documentation Overview Quickstarts Get started Run your first ETL workload End-to-end in the Lakehouse In this article. NVL2 has three parameters, while NVL has two. Function nvl2 in PL/SQL extends the functionality of nvl function provided by Oracle. Version: PL/HQL 0.01. In this article, well look at a few logical functions in Oracle: Each of these functions has a different purpose and exists in different databases. Learn how your comment data is processed. Your email address will not be published. These are all single row function i.e. Courses. expr2 If expr1 is NULL, this expression is evaluated and its value is returned. NVL2 is an Oracle-only function, so this is something you may want to keep in mind. Following this logic we should have this [NVL (5,0 . NVL functions are used to check if one value is NULL and return another. This example uses a string value for both parameters. If Value1 is NULL then NVL function returns Value2 other wise it returns Value1. Notice how the name of the last column has been set to the function name, which isnt ideal. It sets the value of 0 if a NULL value is found for employees. Oracle NVL2 function is replaced by Case Statement in SQL Server. The following piece of code will demonstrate this point. Oracle NVL2, NVL, CASE, DECODE, or COALESCE? Functions, How to use Redshift Foreign key Constraint? If the expression is NOT NULL, the function outputs the value of the field.If a NULL value occurs in NVL, the second expression is executed (=output).A quick example (programming code style) how the . If input values are more than three then an error is returned. A Redshift NVL expression returns the value of the first non-null expression in the list. Het enige verschil tussen de functie RANK, DENSE_RANK en ROW_NUMBER is wanneer er dubbele waarden in de kolom zijn die worden gebruikt in ORDER BY-clausule. NVL is an advanced function that the Oracle database supports. expr3. The argument expr1 can have any data type. If the condition returns TRUE, LNNVL returns FALSE. Similarly, Amazon Redshift NVL2 Function returns the second argument if the first argument is not null, otherwise it returns the third argument. Important points related to the working of nvl2 function in PL/SQL are given below: 1. This example uses the NVL function with date values. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. NVL replaces a null with a string. You might want to query this table to find the names of students who have paid less than 100 of fees_paid. LNNVL returns a boolean value which cannot be interpreted in the SELECT clause, so, although syntactically, you can put in in the SELECT list, it is not useful there. It is similar to the IFNULL Function in MySQL and the ISNULL Function in SQL Server. Given below are the examples of Oracle NVL (): Example #1 Replace null value with zero using NVL function. This can be changed, though. If a string is used for the check_value, a string also needs to be used for the replace_value. In my article on the Oracle DECODE function, I recommend that you use CASE instead of DECODE for several reasons. The Latest Innovations That Are Driving The Vehicle Industry Forward. The values returned by NANVL are the same as each of the original columns because they all have a valid numeric value. The value_to_check parameter can have any data type. NVL2 : If first expression is not null, return second expression. If expr1 is NULL, then NVL2 returns expr3. By clicking Accept, you are agreeing to our cookie policy, How to Handle NULL in Redshift? Why would you use NVL2 instead of NVL, CASE, DECODE, or COALESCE? The parameters of the ISNULL function are: The ISNULL function returns 1 if the value is NULL, and 0 if it is not NULL. If the value in the first parameter is null, the function returns the value in the second parameter. No error is shown, it just doesnt change the data. We use cookies to ensure that we give you the best experience on our website. The NVL2 function is similar to the NVL function. In case the second argument is null, then it returns the third argument. If the value in expression exp5 for nvl2 is null, then NVL returns '0'. Here are some examples of the NVL function. COALESCE is more modern function that is a part of ANSI-92 standard.. NVL is Oracle specific, it was introduced in 80's before there were any standards.. acos function. NVL does a implicit datatype conversion based on the first argument given to it. If it is null then expression3 is returned. NVL (expr1, expr2) : In SQL, NVL () converts a null value to an actual value. When to use the NVL and N VL2 functions? SQL NVL Null Value Logic NULL NULL NULL NVL NVL Oracle Oracle NVL (expr 1, expr 2) expr 1 NULL expr 2 expr 1NULL expr 1 SELECT NVL (, '') FROM ; How to Market Your Business with Webinars? Your email address will not be published. The arguments expr2 and expr3 can have any data types except LONG. What is NVL and nvl2 in Oracle? Scenario - Replacing NULL values in the existing table with specified value in result set by using NVL function.. Requirement - Replacing NULL values in employee_details with specified value in result set by using NVL function. NVL2 () This is one of the functions of SQL extensively used in Structured Query Language (SQL). Oracle nvlnvl2nullif. These functions work with any data type. Its Syntax. If expr1 is null, then NVL2 returns expr3. This example shows you can return another column if the first parameter is NULL, and not just a specific value. Can You Use Oracle NVL Function For Date Values? The NVL function is supported in the various versions of the Oracle/PLSQL, including, Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i and Oracle 8i. An expression, a replacement exp1 and replacement exp2. Contents show. If expr1 is NULL, then NVL2 returns expr3. So, it depends on what you need the function for. View full details Original price $95.00 - Original price $95.00 Original price. NVL2 lets you determine the value returned by a query based on whether a specified expression is null or not null. DATA: King, null, null . oracle nvlnvl2 Oracle; Oracle Oracle Oracle Apex; Oracle Oracle Server Weblogic; Oracle Oracle; Oracle sqoop Oracle Hadoop; For some employees, the secondary contact number is NULL. null, then NVL2 returns '1'. Ive returned the last_name if the country is null, which might not make sense in the real world, but this is just an example. NVL Categories: Conditional Expression Functions NVL If expr1 is NULL, returns expr2, otherwise returns expr1. NVL( ) :-NVL is an pre-defined function which is used to replace (or) substitute user defined values in place of NULL value. For example, replace NULL values with any readable value during the data presentation such as reporting queries. This is the syntax: NVL (expression1, expression2) And this is how it works: If expression1 is not NULL, then expression1 is returned. All Rights Reserved. Disclaimer Here are some examples of the Oracle NVL2 function to help explain how to use the NVL2 function in Oracle SQL. Redshift NVL2 takes three parameters. ; expr2: An expression of any type. The second row is different. You could use NVL. You may need to use a TO_DATE function if youre specifying another date to return if the first parameter is NULL. Usage notes. If the first parameter is any value other than null, it is returned unchanged. Wat is het verschil tussen rang Row_number en Dense_rank in SQL? The NVL function allows you to replace null values with a default value. Oracle NVL Function Syntax and Parameters, SQL ISNULL Function Syntax and Parameters, Oracle NVL2 Function Syntax and Parameters, Oracle LNNVL Function Syntax and Parameters, Oracle NANVL Function Syntax and Parameters. aes_encrypt function. Its similar to NVL because NVL allows you to check a value and return something else if it is null. To replace an expression with one value if it is null and a different value if it is not, use NVL2 . In MySQL, IFNULL () takes two expressions and if the first expression is not NULL, it returns the first expression otherwise it returns the second expression whereas COALESCE () function returns the first non-NULL value of a list, or NULL if there are no non-NULL values. NVL lets you replace a null (blank) with a string in the results of a query. Lets say the values for a row are: You can see that it kind of gets the opposite of what is provided to it. In nvl if argument 1 is null then it returns argument 2 but argument 1 is not null it returns itself. This table demonstrates how the return value is calculated. Data types that can be used are date, character and number. However, they are implemented differently. This type of expression is useful when you want to return a backup value for something when the preferred . In this tutorial, you'll learn the difference between NVL,NVL2 &Coalesce functionsPL/SQL (Procedural Language/Structured Query Language) is Oracle Corporatio. In conclusion, this function returns the first argument if it is not null, otherwise the second argument. provide one result per row. In nvl2 (arg1,arg2,arg3) in nvl2 it converts any number into according to given number with null also . There are several functions in SQL, such as NVL and ISNULL, that perform some kind of logic on the values that are provided. The value_to_check is called expr1, the value_if_not_null is called expr2, and the value_if_null is called expr3. The result is least common type of expr2 and expr3.. The ISNULL function syntax is different in MySQL and SQL Server. aggregate function. NVL. The functions for handling null values that I have learned in SQL Oracle are [code ]NVL, NVL2, NULLIF and COALESCE[/code]. From performance perspective, In Oracle decode and CASE does not make any difference. The LNNVL function returns either TRUE or FALSE. Course also available in: W3Schools Bootstrap 3 course Start your developer career today. It allows you to evaluate data that contains a NULL value, which is something you cant easily do within a single WHERE condition. Oracle NVL. Function nvl2 basically decides the value to be returned from the query based on the null and not null value. The data type of value_to_check determines the output. Published 3. If the expression is NOT NULL, the function outputs the value of the field. Answer (1 of 3): NVL and NVL2 are basically functions for handling NULL Values in tables. Syntax. Lets use our student table, which has a value of fees_required and fees_paid. Normally you can use NVL or NVL2 when you get NULL values as return value. The collation specifications for expr2 and expr3 must be compatible. COALESCE expects all arguments to be of same datatype. If their datatypes are different, then Oracle converts expr2 to the datatype of expr1 before comparing them. The NVL function replaces a NULL value with a replacement string that you provide in the function as an argument. What is NVL and nvl2 in Oracle? But let's just dissect those 2 NVL functio. See the examples below for how this is done. Dynamic SQL Queries in Snowflake Scripting, Working with Snowflake Scripting Stored Procedures. For NVL2 vs CASE, I would use NVL2 only if I was checking for NULL. Lets say we have this student table here. In nvl2 (arg1,arg2,arg3) in nvl2 it converts any number into according to given number with null also . Otherwise, it would return the 'Completed'. When a non-null value is found, the remaining expressions in the list are not evaluated. This example uses a mix of data types. NVL2. So, this example demonstrates that the NANVL function changes NaN values to other values. Syntax: NVL( Value1, Value2) Here Value1 and value2 must be belongs to the same datatype. The Oracle NVL2 function is a little different. All of the records have the first_name showing, except for the last record, where it has been replaced with the specified value. Difference between IFNULL () and COALESCE () function in MySQL. Microsoft's ISNULL () function is used to specify how we want to treat NULL values. MariaDB is the leading enterprise open source database with features previously only available in costly proprietary databases. Thanks! All three expressions should have the same (or compatible) data type. 5 When to use the NVL and N VL2 in Oracle? But it is also possible, that no row is returned. For NVL2 vs DECODE, I would also use NVL2 only if I was checking for NULL, as with CASE. I could have entered any number in the second parameter other than 9999. The syntax of the Oracle NVL2 function is: The parameters of the LNNVL function are: The parameters of the Oracle NANVL function are: The NANVL function can take any numeric data type as an input. NVLSQLnull null null NVL( ) null OracleNVLNVL2null How to Get Rows Affected by Last Snowflake SQL Query? If you're likely to move to a non-Oracle system, then use NVL (possible with a CASE statement). If it is not null, then expression2 is returned. In this case we want NULL values to be zero. The ISNULL function returns the replace_value if the input_value is NULL, and returns input_value if it is not NULL. The NANVL function is used to return a different value if the specified value is NaN (not a number). The NVL ( ) function is available in Oracle, and not in MySQL or SQL Server. NVL Checks one value and returns it, if it is null, return another value, NVL2 Checks one value, if it is null, return a different value, if it is not null, return another different value, CASE Allows for IF-THEN-ELSE statements in SQL. NVL NVL(x,value) xvaluex NVLNVL2. You can see that your results include a few rows, but dont include the row where fees_paid is null. The collation specification for expr1 is ignored because all that matters about this expression is Answer (1 of 4): NVL refers to evaluate null to specific value. The way I understood this formula works is if the value in expr1 for nvl is null, then NVL returns Expression '0'. Its Syntax, How to use Redshift Unique Key Constraint? Who are the main characters in the book Holes? If expr1 is not null, then NVL2 returns expr2 . If expr1 is not NULL, this expression will be evaluated and Answer: The nvl function only has two parameters while the nvl parameter has three arguments. Well, there seems to be a lot of functions that you can use to get the same result. When the NANVL function runs against each of them, the two 0 values remain the same. The value_if_not_null and value_if_null can have any data type except LONG. SQL Default Value if no row is returned - Blogofant - Elefantisch gut! Logic equivalent. Redshift NVL2 Syntax. The nvl2 like like combining an nvl with a decode because you can transform a value: NVL ( expr1 , expr2 ): If expr1 is null, then NVL returns expr2. It's similar to the NVL () function, except that NVL2 () accepts exactly three arguments. Returns values depending on whether the first input is NULL: If expr1 is NOT NULL, then NVL2 returns expr2. The differences are: NVL accepts only 2 arguments whereas COALESCE can take multiple arguments. This output shows NULL being used to replace the NULL value. NVL : This single row function use for Convert the null value to an actual value. But, sometimes you may not want to use NVL. Nvl (arg1,arg2) nvl is used for converting null values. 2. The output is shown as expected. The nvl2 like like combining an nvl with a decode because you can transform a value: NVL ( expr1 , expr2 ): If expr1 is null, then NVL returns expr2. If first expression is null, return third expression. ISNULL exists in SQL Server and MySQL, where NVL is only in Oracle. Redshift NVL2; NULLIF; Redshift NVL or COALESCE. NVL lets you replace null (returned as a blank) with a string in the results of a query. If you continue to use this site we will assume that you are happy with it. Notice how the name of the column has been updated as well, to Fixed Employees. whether it is NULL or not. highest-precedence collation of expr2 and If value_if_not_null is a character type, then value_if_null is converted to the data type of value_if_not_null before comparing, unless value_if_null is a NULL constant. It works in a similar way to the character examples. (*) COALESCE, but not NVL and NVL2, can be used with group functions to replace null values. Another example using the NVL2 function in Oracle/PLSQL is: select supplier_id, NVL2 (supplier_desc, supplier_name, supplier_name2) from . If expr1 is null, then NVL2 returns expr3 . It is used to substitute a value, when a NULL value is encountered. Say Happy Birthday in Italian 8 Easy Ways. In this article, we'll be discussing some powerful SQL general functions, which are - NVL, NVL2, DECODE, COALESCE, NULLIF, LNNVL and NANVL. DECODE Allows for IF-THEN-ELSE statements in SQL. The same functionality could be done with a JOIN, and is easier to understand. So, thats how to use the NVL and NVL2 functions in Oracle. Build sought-after coding skills. The expression to be checked to see whether it is NULL. Two values are set to 0, and two are NaN (not a number). document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. This example shows a similar example, but weve specified NULL as the third parameter, to see what happens. Learn what they all do and see some examples in this article. Required fields are marked *. If the replace_value is NULL, it is still returned. The values in red indicate those that have been translated from NULL, so you can see where the impacted values are. This function can hold three input values only. Applies to: Databricks SQL Databricks Runtime Returns expr2 if expr1 is not NULL, or expr3 otherwise.. Syntax nvl2(expr1, expr2, expr3) Arguments. NVL2 is an advanced function that the Oracle database supports. In nvl if argument 1 is null then it returns argument 2 but argument 1 is not null it returns itself. The purpose of the LNNVL is to perform a logical not null on the expression that has been provided. Since any of the expressions in a DECODE statement can be NULL, the NVL and NVL2 functions are actually specialized versions of DECODE. Question: When should I use the nvl function as opposed to the nvl2 function.What is the difference between nvl and nvl2? However, the two NaN values are changed to 9999 as part of the NANVL function. The query was as follows - SELECT emp_id, emp_name, NVL(manager_id,'Employee0') manager_id FROM employee_details; By executing above query, we can get specified . It is also used to check if a value is NULL and return a different value if it is. NVL and NVL2 are basically functions for handling NULL Values in tables. Oracle nvlnvl2nullif,oracle,oracle10g,Oracle,Oracle10g,oraclenvlnvl2nullif SELECT fName, LENGTH (fName) "First Name", lName, LENGTH (lName) "Last Name", NULLIF (LENGTH (fName), LENGTH (lName)) Output . If expr1 is not null, then NVL returns expr1. It's similar to NVL because NVL allows you to check a value and return something else if it is null. NVL2(x,value1,value2) xvalue1value2 NVLxvalueNULLNVL . TLDR TEch. See Also: Table 2-8 for more information on implicit conversion and "Numeric Precedence" for information on numeric precedence "COALESCE" and "CASE Expressions", which provide functionality similar to that of NVL Appendix C in Oracle Database Globalization Support Guide for the collation derivation rules, which define the collation assigned to the return value of NVL when it is a character value If value_if_not_null is numeric, then Oracle determines the type with the higher precedence. NVL2 has three parameters, while NVL has two. The SQL Server ISNULL () function lets you return an alternative value when an expression is NULL: SELECT ProductName, UnitPrice * (UnitsInStock + ISNULL (UnitsOnOrder, 0)) FROM Products; or we can use the COALESCE () function, like this: SELECT ProductName, UnitPrice * (UnitsInStock + COALESCE(UnitsOnOrder, 0)) FROM Products; If it is not NULL, it is returned by the function. Nvl(arg1,arg2) nvl is used for converting null values. In contrast, for NVL2, the return will have the value of either the not_null_return_value or null_return_value parameter, whichever is selected by the . The NVL function is structured like this: So, first of all, the check_value value is checked to see if it is NULL. Returns replacement-exp1 if exp is not null, otherwise replacement-exp2 is returned. The NVL2 function is similar to the NVL function. COALESCE Returns the first non-null expression in your list. NVL ( expr1 , expr2 ): If expr1 is null, then NVL returns expr2. The NVL (), IFNULL (), and COALESCE () functions can also be used to achieve the same result. This example uses multiple NVL functions on multiple columns, and they have all been renamed. expr1: An expression of any type. Blogofant - Elefantisch gut! NVL always evaluates both arguments, while COALESCE usually stops evaluation whenever it finds the first non . If the first expression is null, the third expression is returned. This function returns the first value after NOT NULL value is found, when searched in the function. The Teradata NVL function is equivalent to Teradata COALESCE function. 12. abs function. , Technology & Media / Bravo Quadrant Throttle / Games / Microsoft Flightsimulator 2020 / SpadNext, Honeycomb Bravo Throttle Quadrant Key Maps / Button Maps, The optimal camp location for Fallout 76 Guide, Fallout 76 Supplies and Storage Management Part 1, 6 ways to wish Indonesians a happy birthday, How many antibodies are enough? Whats the difference between the NVL and nvvl2 functions? SQL NVL2 () Explained. $95.00 $95.00 - $95.00. NVL2 is also an Oracle-specific function, so if youre planning on moving database systems, its something to consider. acosh function. Example: 1) NVL( null, 20) Output: 20 2) NVL(30 . An NVL or COALESCE expression returns the value of the first expression in the list that is not null. Extra spaces, null values, blank values, wrong data types and duplicate values all stand in the way of properly evaluating data - that's where the NVL and NVL2 functions can help make report output more meaningful. I find that examples are the best way for me to learn about code, even with the explanation above. This example uses numeric data types to show the NVL2 function. Powered by - Designed with theHueman theme, Glue is one of the most commonly used materials in, With the Graz Old Town Tram (Grazer Altstadt Bim) free through Graz, SQL IN List Multi-value comparison IN List, What Is The Difference Between Nvl And Nvl2 Functions In Oracle? Well, yes, you can use the NVL function in a WHERE clause. An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. The NVL2 function is supported in the various versions of the Oracle/PLSQL, including, Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i and Oracle 8i. These parameters are called different names by Oracle in their NVL2 function definition. This function is used to replace NULL value with another value. I would also use CASE instead of DECODE if possible. If a is not null, then return b, else return c: 2022 Snowflake Inc. All Rights Reserved, --------+--------+--------+---------------+, 0 | 5 | 3 | 5 |, 0 | 5 | [NULL] | 5 |, 0 | [NULL] | 3 | [NULL] |, 0 | [NULL] | [NULL] | [NULL] |, [NULL] | 5 | 3 | 3 |, [NULL] | 5 | [NULL] | [NULL] |, [NULL] | [NULL] | 3 | 3 |, [NULL] | [NULL] | [NULL] | [NULL] |, DATABASE_REFRESH_PROGRESS , DATABASE_REFRESH_PROGRESS_BY_JOB, REPLICATION_GROUP_REFRESH_PROGRESS, REPLICATION_GROUP_REFRESH_PROGRESS_BY_JOB, STAGE_DIRECTORY_FILE_REGISTRATION_HISTORY, SYSTEM$AUTHORIZE_STAGE_PRIVATELINK_ACCESS, SYSTEM$DATABASE_REFRESH_PROGRESS , SYSTEM$DATABASE_REFRESH_PROGRESS_BY_JOB , SYSTEM$ESTIMATE_SEARCH_OPTIMIZATION_COSTS, SYSTEM$GET_PRIVATELINK_AUTHORIZED_ENDPOINTS, SYSTEM$USER_TASK_CANCEL_ONGOING_EXECUTIONS, TRY_TO_DECIMAL, TRY_TO_NUMBER, TRY_TO_NUMERIC. NVL2 ( expr1 , expr2 , expr3 ): If expr1 is null, then NVL2 returns expr3. 2022. Datenschutzerklrung The NVL and NVL2 functions allow you to test an expression to see whether it is NULL. The Oracle NVL function allows you to use a different value when a NULL or empty value is found. Oracle NVL2 () overview The Oracle NVL2 () function is an extension of the NVL () function with different options based on whether a NULL value exists. Notice how the TO_DATE needs to be used, as I have specified a date manually, but it needs to be converted from string to date. 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