MySQL的觸發器的phpmyadmin

Question

我想創建一個觸發器，其中 第一個值是從entry_table 計算我已經建立的查詢，以計算

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

的值，然後插入計值稱爲total_table

條目表另一個表

總計表

下了扳機查詢

INSERT INTO totals (SUM_A, SUM_B, SUM_C) 

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

Answer 1

這觸發對您有所幫助。

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 

如果你取任何問題，讓我知道