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Funkcja NULLIF zwraca wartość null, jeśli argumenty są równe, w przeciwnym razie zwraca wartość pierwszego argumentu. NULLIF ( expression1, expression2) Schemat to SYSIBM. expression1. Wyrażenie, które zwraca wartość dowolnego wbudowanego lub zdefiniowanego przez użytkownika typu danych. expression2.
The NULLIF function returns a null value if the arguments are equal, otherwise it returns the value of the first argument.
The NULLIF function returns the null value if the two arguments are equal; otherwise, it returns the value of the first argument.
IFNULL (expr1, default) is the exact match you're looking for in DB2. COALESCE allows multiple arguments, returning the first NON NULL expression, whereas IFNULL only permits the expression and the default. Thus. SELECT product.ID, IFNULL (product.Name, "Internal") AS ProductName FROM Product.
Besides the COALESCE function, SQL provides you with the NULLIF function which is a control flow function that allows you to test the arguments and returns either the first argument or NULL based on the result of the evaluation. The NULLIF function accepts two arguments.
10 cze 2023 · The SQL NULLIF function lets you compare two values and determine if they match or not: Match? The function will return NULL. Don’t match? The function will return the first value. Syntax and Parameters. The syntax of the SQL NULLIF function is: NULLIF (expr1, expr2) The parameters of the NULLIF function are:
The NULLIF function returns the null value if the two parameters are equal, otherwise it returns the value of the first parameter. Syntax of NULLIF. NULLIF (expression1, expression2) The result of NULLIF (exp1, exp2) is same as using CASE statement "CASE WHEN exp1=exp2 THEN NULL ELSE exp1 END" Example using NULLIF.
