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  1. The Oracle NVL() function allows you to replace null with a more meaningful alternative in the results of a query. The following shows the syntax of the NVL() function: NVL(e1, e2) Code language: SQL (Structured Query Language) (sql) The NVL() function accepts two arguments. If e1 evaluates to null, then NVL() function returns e2.

  2. 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.

  3. The Oracle/PLSQL NVL function lets you substitute a value when a null value is encountered. Syntax. The syntax for the NVL function in Oracle/PLSQL is: NVL( string1, replace_with ) Parameters or Arguments. string1. The string to test for a null value. replace_with. The value returned if string1 is null. Returns.

  4. 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;

  5. 10 lut 2023 · Funkcja NVL (ang. Null Value) w języku SQL Oracle służy do zamiany wartości NULL na inne określone przez użytkownika. Składnia funkcji NVL wygląda następująco: NVL(wartość_porównywana, wartość_zamieniana) Przykład: SELECT NVL(NULL, 'brak danych') FROM dual; Wynik:

  6. docs.oracle.com › cd › B19306_01NVL - Oracle

    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 datatype.

  7. 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.

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