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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.
17 paź 2024 · MySQL provides two ways to insert a row into a table or update the row if it already exists. We can use the INSERT INTO … ON DUPLICATE KEY UPDATE syntax or the REPLACE statement.
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();
2 lut 2024 · ON DUPLICATE KEY UPDATE to Update the Record if It Exists Else Insert It in the MySQL Table. We can employ the INSERT ... ON DUPLICATE KEY UPDATE statement and clause as an alternative approach for inserting into rows that might have duplicate UNIQUE or PRIMARY KEY values.
You can use the INSERT INTO …. 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:
1 cze 2015 · IF EXISTS (SELECT * FROM Allowance WHERE EmployeeID =10000001 and Year = 2014 and Month = 4) UPDATE Allowance. SET OverTime = 10.00, Medical = 10.00, Lunch = 10.45, Bonus =10.10, Allowance = 40.55. WHERE EmployeeID =10000001 and Year = 2014 and Month = 4. ELSE.
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 specifies which record (s) that should be updated.
