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Learn how to use the Oracle NVL2() function to replace a null value with different values depending on a condition. See syntax, flowchart, and examples with numeric, character, and expression data types.
NVL2 lets you determine the value returned by a query based on whether a specified expression is null or not. Learn the syntax, purpose, examples, and data type conversions of NVL2.
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.
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 .
NVL lets you replace null (returned as a blank) with a string in the results of a query. If expr1 is null, then NVL returns expr2. If expr1 is not null, then NVL returns expr1. The arguments expr1 and expr2 can have any data type.
Funkcje NVL i NVL2. Baza danych Oracle przygotowała kilka specjalnych funkcji do obsługi NULLi. W szczególności przydatne są dwie funkcje które pozwalają zastąpić wartość null jakąś wybraną. NVL() Funkcja NVL(wartość_1, wartość_2) jest funkcją przyjmującą dwie wartości.
