在sql Server中,您可以执行以下操作:
UPDATE Table_1
SET Column_2 = t2.Column_2
FROM Table_1 AS t1
INNER JOIN Table_2 AS t2 ON t2.Column_1 = t1.Column_1
或类似的东西
UPDATE Table_1
SET Column_2 = (
SELECT t2.Column_2
FROM Table_2 AS t2
WHERE t2.Column_1 = Table_1.Column_1
)
当然,如果表_2中有多行,则会出现错误…。