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17 cze 2009 · ORACLE/PLSQL: NVL FUNCTION. SELECT NVL(SUM(Price), 0) AS TotalPrice FROM Inventory WHERE (DateAdded BETWEEN @StartDate AND @EndDate) This SQL statement would return 0 if the SUM(Price) returned a null value. Otherwise, it would return the SUM(Price) value.
8 mar 2021 · Use NVL function. select jobs, nvl(salary, 0) as salary from your_table Or COALESCE. select jobs, coalesce(salary, 0) as salary from your_table Or DECODE. select jobs, decode(salary, null, 0, salary) as salary from your_table Or CASE. select jobs, case when salary is null then 0 else salary end as salary from your_table
Using the NVL function we replace the null values with 'ZERO'. SQL> SELECT id, NVL(col1, 'ZERO') AS output FROM null_test_tab ORDER BY id; ID OUTPUT ---------- ---------- 1 ONE 2 ZERO 3 ZERO 4 ZERO 4 rows selected.
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;
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 )
This tutorial shows you how to use the Oracle NVL2() function to substitute a null value with different options.
Null functions. Oracle Database includes many functions to help you handle nulls. NVL and coalesce are two that map nulls to non-null values. NVL. This takes two arguments. If the first is null, it returns the second: select toy_name, volume_of_wood, nvl ( volume_of_wood , 0 ) mapped_volume_of_wood from toys; Coalesce. This is like NVL.
