Search results
17 lis 2010 · I want to add a row to a database table, but if a row exists with the same unique key I want to update the row. For example: INSERT INTO table_name (ID, NAME, AGE) VALUES(1, "A", 19); Let’s say the unique key is ID, and in my Database, there is a row with ID = 1.
27 sty 2024 · It works by attempting to insert a new row. If the insertion would result in a duplicate entry for a PRIMARY KEY or a UNIQUE index, MySQL updates the existing row instead. INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...) ON DUPLICATE KEY UPDATE column1 = value1, column2 = value2, ...;
29 kwi 2015 · IF EXISTS (select * from users where username = 'something') THEN. update users set id= 'some' where username = 'something'; ELSE. insert into users (username) values ('something'); END IF; end $$. delimiter ; and call it like this: call select_or_insert();
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.
ON DUPLICATE KEY UPDATE statement in MySQL to achieve this. This statement will insert a new row into the table, or if a duplicate key violation occurs (i.e., a row with the same primary or unique key exists), it will update the existing row with the new values. Here’s the SQL query:
23 cze 2013 · I know I'm a little late to this, but I think an easier to read solution would be to use the IF() function in MySQL: UPDATE relation SET name1 = IF(userid1 = 3, 'jack', name1), name2 = IF(userid2 = 3, 'jack', name2) WHERE (userid1 = 3 AND userid2 = 4) OR (userid1 = 4 AND userid2 = 3);
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:
