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1 lut 2010 · How do I update a table and set different values upon the condition evaluating to True. For instance : UPDATE Table SET A = '1' IF A > 0 AND A < 1 SET A = '2' IF A > 1 AND A < 2 WHERE A IS NOT NULL;
The WHERE clause, if given, specifies the conditions that identify which rows to update. With no WHERE clause, all rows are updated. If the ORDER BY clause is specified, the rows are updated in the order that is specified. The LIMIT clause places a limit on the number of rows that can be updated.
In this article, we would like to show you UPDATE query with IF condition in MySQL. Quick solution: UPDATE `table_name` SET `column_name` = IF(condition , if_true, if_false); Practical example. To show UPDATE query with IF condition, we will use the following users table:
The MySQL UPDATE Statement. The UPDATE statement is used to modify the existing records in a table. UPDATE Syntax. UPDATE table_name. SET column1 = value1, column2 = value2, ... WHERE condition; Note: Be careful when updating records in a table! Notice the . WHERE clause in the UPDATE statement.
I have the following UPDATE query: UPDATE DeviceAttribute SET Details = CASE Name WHEN 'Accessories' THEN @Accessories WHEN 'Description' THEN @Description WHEN 'Specification' THEN @Specification ELSE Details END WHERE DeviceID = 10 The parameters are filled in by different users.
11 mar 2015 · IF EXISTS (SELECT id FROM user_roles WHERE user_id = 5 AND end_date IS NULL) THEN UPDATE user p JOIN user_roles ur ON p.id = ur.user_id SET ur.end_date = NOW() , p.end_date = NOW() , p.reason = "Retired" WHERE p.id = 5 AND ur.end_date IS NULL ELSE UPDATE user SET end_date = NOW() , reason = "Retired" WHERE id = 5 END IF
The WHERE clause, if given, specifies the conditions that identify which rows to update. With no WHERE clause, all rows are updated. If the ORDER BY clause is specified, the rows are updated in the order that is specified. The LIMIT clause places a limit on the number of rows that can be updated.