Question

I’m getting that error running on MySQL 5.5.8

Mysql2::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE 
      (SELECT id FROM products WHERE id = NEW.brand_id) IS NULL;
      EN' at line 6:  
    CREATE TRIGGER fk_brands_products_insert 
    BEFORE INSERT ON brands 
    FOR EACH ROW BEGIN
    SELECT 
      RAISE(ABORT, "constraint violation: fk_brands_products")
    WHERE 
      (SELECT id FROM products WHERE id = NEW.brand_id) IS NULL;
      END;

What could be wrong?

Answer 1

I suspect the problem is there is no FROM clause in your select statement.