在SQL Server中,可以使用insert将行插入到表中。。SELECT语句:

INSERT INTO Table (col1, col2, col3)
SELECT col1, col2, col3 
FROM other_table 
WHERE sql = 'cool'

是否也可以使用SELECT更新表?我有一个包含这些值的临时表,并希望使用这些值更新另一个表。也许是这样的:

UPDATE Table SET col1, col2
SELECT col1, col2 
FROM other_table 
WHERE sql = 'cool'
WHERE Table.id = other_table.id

当前回答

SQLite3对我很有用,在INNER SELECT之后用SELECT更新行。

UPDATE clients
SET col1 = '2023-02-02 18:51:30.826621'
FROM (
      SELECT * FROM clients dc WHERE dc.phone NOT IN (
               SELECT do.phone FROM dclient_order do WHERE do.order_date > '2023-01-01' GROUP BY do.phone
               )
      ) NewTable
WHERE clients.phone = NewTable.phone;

其他回答

UPDATE
    Table_A
SET
    Table_A.col1 = Table_B.col1,
    Table_A.col2 = Table_B.col2
FROM
    Some_Table AS Table_A
    INNER JOIN Other_Table AS Table_B
        ON Table_A.id = Table_B.id
WHERE
    Table_A.col3 = 'cool'

同样的解决方案可以用稍微不同的方式编写,因为我只想设置一次列。这两张桌子我都写过了。它在MySQL中工作。

UPDATE Table t,
(SELECT col1, col2 FROM other_table WHERE sql = 'cool' ) o
SET t.col1 = o.col1, t.col2=o.col2
WHERE t.id = o.id

像其他人一样,必须指出MySQL或MariaDB使用不同的语法。它还支持非常方便的USING语法(与T/SQL相反)。INNER JOIN也是JOIN的同义词。因此,原始问题中的查询最好在MySQL中实现:

UPDATE
    Some_Table AS Table_A

JOIN
    Other_Table AS Table_B USING(id)

SET
    Table_A.col1 = Table_B.col1,
    Table_A.col2 = Table_B.col2

WHERE
    Table_A.col3 = 'cool'

我在其他答案中没有看到问题的答案,因此我的两分钱。(在PHP 7.4.0 MariaDB 10.4.10上测试)

如果你想加入表本身(这不会经常发生):

update t1                    -- just reference table alias here
set t1.somevalue = t2.somevalue
from table1 t1               -- these rows will be the targets
inner join table1 t2         -- these rows will be used as source
on ..................        -- the join clause is whatever suits you

以下示例使用派生表(FROM子句后的SELECT语句)返回旧值和新值以供进一步更新:

UPDATE x
SET    x.col1 = x.newCol1,
       x.col2 = x.newCol2
FROM   (SELECT t.col1,
               t2.col1 AS newCol1,
               t.col2,
               t2.col2 AS newCol2
        FROM   [table] t
               JOIN other_table t2
                 ON t.ID = t2.ID) x