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The Oracle NVL2() function is an extension of the NVL() function with different options based on whether a NULL value exists. The Oracle NVL2() function accepts three arguments. If the first argument is not null, then it returns the second argument.
The Oracle/PLSQL NVL2 function extends the functionality found in the NVL function. It lets you substitutes a value when a null value is encountered as well as when a non-null value is encountered. Syntax. The syntax for the NVL2 function in Oracle/PLSQL is: NVL2( string1, value_if_not_null, value_if_null ) Parameters or Arguments. string1.
8 sie 2024 · NVL Function in SQL. In SQL, NVL () converts a null value to an actual value. Data types that can be used are date, character and number. The data type must match with each other i.e. expr1 and expr2 must be the same data type. Syntax –. NVL (expr1, expr2) expr1. is the source value or expression that may contain a null. expr2.
29 kwi 2016 · Both the NVL(exp1, exp2) and NVL2(exp1, exp2, exp3) functions check the value exp1 to see if it is null. With the NVL(exp1, exp2) function, if exp1 is not null, then the value of exp1 is returned; otherwise, the value of exp2 is returned, but case to the same data type as that of exp1.
NVL2 lets you determine the value returned by a query based on whether a specified expression is null or not null. If expr1 is not null, then NVL2 returns expr2 . If expr1 is null, then NVL2 returns expr3 .
SQL> NVL. The NVL function allows you to replace null values with a default value. If the value in the first parameter is null, the function returns the value in the second parameter. If the first parameter is any value other than null, it is returned unchanged. We know that COL1 in the test table contains null in all rows except the first.
15 mar 2022 · Get an overview of the NVL and NVL2 SQL functions along with examples of their use for correcting null values in reports.
