我想插入一行到另一個表

Question

後更新MySQL中的表我有兩個表

bill 
(id,amount,points) 

bill_history 
(id,bill_id,amount,points) 

當行插入bill_history，我想總結一下從bill_history表的數量和點它應該根據bill_id更新在帳單表中

Answer 1

您可以簡單地在bill_history表上創建一個觸發AFTER INSERT。

而在此觸發器中，您可以編寫邏輯以更新bill表中的SUM(AMOUNT)和SUM(POINT)。

Answer 2

您可以使用TRIGGER：

DELIMITER | 

CREATE TRIGGER ins_bill_history AFTER INSERT ON bill_history 
FOR EACH ROW 
    BEGIN 
     UPDATE bill 
      SET points = (SELECT SUM(points) FROM bill_history WHERE bill_history.bill_id = NEW.bill_id), 
       amount = (SELECT SUM(amount) FROM bill_history WHERE bill_history.bill_id = NEW.bill_id) 
     WHERE bill.id = NEW.bill_id; 
    END; 
| 

另一種解決方案是使用一個VIEW來SUM對飛points和amount：

CREATE VIEW v_bill AS 
    SELECT bill.*, SUM(bh.points) AS 'points', SUM(bh.amount) AS 'amount' 
    FROM bill b INNER JOIN bill_history bh ON b.id = bh.bill_id 
    GROUP BY b.id 

注：在使用的情況下， VIEW您必須刪除表中的列points和。

Answer 3

試試這樣說：

INSERT INTO YourTable(columns....) 
    VALUES(..........) 

SET v_lastinsertedrecord = LAST_INSERT_ID() 

UPDATE YourTable SET (COLUMNS='value') WHERE id=@lastinsertedrecord