觸發器中的UPDATE語法錯誤

Question

我需要自動更新列中的觸發器。

這裏是代碼：

create trigger sum update on `cash` 
for each row 
begin 
UPDATE `cash` 
SET `sum_cash` = `cash` + `sum_cash`; 
end; 
$$ 

而且我得到了以下錯誤：

#1064 - 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 'update on `cash` for each row begin UPDATE cash` SE' at line 1 

我對MySQL的工作。

Answer 1

試試這個：

delimiter $$ 
create trigger my_sum after update on `cash` 
for each row 
begin 
UPDATE `cash` 
SET `sum_cash` = `cash` + `sum_cash`; 
end; 
$$ 

你錯過了after或before關鍵字。此外，由於sum是關鍵字，因此我更改了觸發器名稱。