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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;
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.
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.
12 lis 2014 · Of course you can do it in MySQL query. And you can do it in WHERE like this: SELECT * FROM your_table WHERE IF (CURDATE() > start_date, 1, 0) = 1; this query will select only rows that are 'higher' then column 'start_date' (start_date must be type DATE)
16 kwi 2016 · However, given how the conditions are re-used in your UPDATE statement, you could also take a different approach altogether: represent the affected IDs and the new values as a derived table and use an update with a join:
The IF...THEN statement allows you to execute a set of SQL statements based on a specified condition. The following illustrates the syntax of the IF-THEN statement: IF condition THEN statements; END IF ; Code language: SQL (Structured Query Language) ( sql )
