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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.
In MySQL, the INSERT ON DUPLICATE KEY UPDATE statement allows you to insert new rows into a table. If a duplicate key violation occurs, you can use the INSERT ON DUPLICATE KEY UPDATE statement to update existing rows instead of throwing an error.
ON DUPLICATE KEY UPDATE inserts or updates a row, the LAST_INSERT_ID() function returns the AUTO_INCREMENT value. The ON DUPLICATE KEY UPDATE clause can contain multiple column assignments, separated by commas.
27 gru 2023 · INSERT…ON DUPLICATE KEY UPDATE is a syntax that comes into play when a table has a unique or primary key constraint.
MySQL's INSERT...ON DUPLICATE KEY UPDATE construct allows you to insert data while avoiding conflicts with existing records. Combined with the VALUES() function, you can use it to make contextual updates to records that already exist without issuing multiple statements.
INSERT with an ON DUPLICATE KEY UPDATE clause enables existing rows to be updated if a row to be inserted would cause a duplicate value in a UNIQUE index or PRIMARY KEY. A row alias with one or more optional column aliases can be used with ON DUPLICATE KEY UPDATE to refer to the row to be inserted.
Learn to insert rows in MySQL only if they don't exist. Explore techniques like INSERT IGNORE, REPLACE, and ON DUPLICATE KEY UPDATE. Dive into the guide!
