DELIMITER $$
CREATE
TRIGGER mm5
.insert_2
BEFORE INSERT ON mm5
.st_question
FOR EACH ROW
BEGIN
IF NEW.course_id IS NULL THEN
SELECT course_id INTO NEW.course_id FROM st_catalog WHERE id = NEW.catalog_id;
END IF;
END$$
DELIMITER ;
报错
1 queries executed, 0 success, 1 errors, 0 warnings
查询:CREATE TRIGGER mm5
.insert_2
BEFORE INSERT ON mm5
.st_question
FOR EACH ROW BEGIN IF NEW.course_id IS NULL THEN SELECT cou...
错误代码: 1327
Undeclared variable: NEW