Question

我有以下select语句：

SELECT * FROM pgp 
WHERE group_id IN (
    SELECT group_id FROM pgroups 
    WHERE label LIKE 'Registration%' 
        AND label NOT LIKE '%Snom%'
) 
    AND pid = 12;

它会返回如下结果：

 group_id | pid      | value | updatev
----------+----------+-------+----------
       34 |       12 |       | f
       11 |       12 |       | t
        4 |       12 |       | t
       13 |       12 |       | t
       17 |       12 |       | f
       19 |       12 |       | f

对于返回的所有记录，我想强制＆＃34; updatev＆＃34;要设置为true的字段。我不知道该怎么做。感谢

Answer 1

只需将SELECT更改为UPDATE：

即可

UPDATE pgp
SET  updatev = 't'
WHERE group_id IN (SELECT group_id FROM pgroups WHERE label like 'Registration%' and label not like '%Snom%') and pid = 12;

这实际上是一种很好的做法 - 在实际更改任何数据之前，使用SELECT来确定您的标准。

Answer 2

使用update声明：

UPDATE pgp 
SET    updatev = true
WHERE  group_id IN (SELECT group_id 
                    FROM   pgroups 
                    WHERE  label LIKE 'Registration%' AND 
                           label NOT LIKE '%Snom%') AND
       pid = 12;

Answer 3

可能会工作

Update pgp 
set updatev='t'
WHERE group_id IN (SELECT group_id FROM pgroups WHERE label like 'Registration%' and label not like '%Snom%') and pid = 12;

如何从表A中选择记录并更新表A.

3 个答案: