MySQL error code: 1175 during UPDATE in MySQL Workbench

Question

I\'m trying to update the column visited to give it the value 1. I use MySQL workbench, and I\'m writing the statement in the SQL editor from inside the workben

Answer 1

If you're having this problem in a stored procedure and you aren't able to use the key in the WHERE clause, you can solve this by declaring a variable that will hold the limit of the rows that should be updated and then use it in the update/delete query.

DELIMITER $
CREATE PROCEDURE myProcedure()
BEGIN
    DECLARE the_limit INT;

    SELECT COUNT(*) INTO the_limit
    FROM my_table
    WHERE my_column IS NULL;
        
    UPDATE my_table
    SET my_column = true
    WHERE my_column IS NULL
    LIMIT the_limit;
END$