MySQL的触发器的phpmyadmin

Question

我想创建一个触发器，其中 第一个值是从entry_table 计算我已经建立的查询，以计算

SELECT *, COUNT(DISTINCT account), SUM(amount) FROM entry GROUP BY account 

的值，然后插入计值称为total_table

条目表另一个表

总计表

下了扳机查询

INSERT INTO totals (SUM_A, SUM_B, SUM_C) 

SELECT *, COUNT(DISTINCT account), SUM(amount) FROM entry GROUP BY account 

Answer 1

这触发对您有所帮助。

DROP TRIGGER IF EXISTS `enter_value`; 
DELIMITER ;; 
CREATE TRIGGER `enter_value` AFTER INSERT ON `entry_table` 
FOR EACH ROW begin 

    IF NEW.account = 'sum_a' then 
     INSERT INTO totals table (SUM_A) 
     SELECT sum(amount) FROM entry where account = 'sum_a' GROUP BY account; 
    ELSE IF NEW.account = 'sum_b' then 
     INSERT INTO totals table (SUM_B) 
     SELECT sum(amount) FROM entry where account = 'sum_b' GROUP BY account; 
    ELSE IF NEW.account = 'sum_c' then 
     INSERT INTO totals table (SUM_C) 
     SELECT sum(amount) FROM entry where account = 'sum_c' GROUP BY account; 
    END IF; 

END 

如果你取任何问题，让我知道