如何更新一個SQL語句的多個表在DB2

Question

僞代碼如下：

update TABLEA a, TABLEB b 
set a.addr = 'aaa', 
b.name = 'bbb' 
from TABLEA a, TABLEB b 
where a.id = b.id and a.id = 1 

Answer 1

您只能更新一個表。因此，您可以將SQL更改爲以下內容：

UPDATE tableA a 
SET a.addr = 'aaa' 
WHERE exists 
    (SELECT b.id 
     FROM tableB b 
     WHERE b.id = a.id)