how to replace null values in sql

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showing results for - "how to replace null values in sql"
Domenico
14 Nov 2016
1SELECT IFNULL(Price, 0) FROM Products;
2SELECT COALESCE(Price, 0) FROM Products;
3-- Oracle (extra):
4SELECT NVL(Price, 0) FROM Products;
Gabriele
21 Sep 2019
1CASE WHEN ColumnName IS NULL THEN 'anyText' 
2ELSE ColumnName END 
3---------EXAMPLE --------------------------
4SELECT E.Name as Employee, CASE WHEN M.Name IS NULL THEN 'No Manager' 
5   ELSE M.Name END as Manager
6FROM  tblEmployee E
7LEFT JOIN tblEmployee M
8ON   E.ManagerID = M.EmployeeID
Ilaria
16 Aug 2018
1--See records where specific column is NULL
2SELECT * from table1 WHERE column1 ISNULL 
3
4--Update all the NULL values in the selected column
5UPDATE table1 SET column1 = replace_value WHERE column1 ISNULL
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