Question

我在mysql中有两个select语句。

对于两个union语句，我需要where两个带有select子句的mysql查询。有什么想法吗？

EX：

(SELECT leases.id,leases.commencement as term, leases.commencement as start_date, leases.execution as execution
FROM `leases` leases.commencement > CURDATE())a
UNION ALL
(SELECT leases.id, leases.commencement as term, leases.commencement as start_date, leases.execution as execution
FROM `leases` leases.commencement BETWEEN '2014/01/01' and CURDATE()) b 
where a.commencement=b.commencement

Answer 1

我认为你不想做UNION。相反，你试图在两个派生表之间进行JOIN，如下所示

SELECT a.*,b.*
FROM
(
SELECT leases.id,
leases.commencement as term,
leases.commencement as start_date,
leases.execution as execution
FROM leases 
WHERE leases.commencement > CURDATE()
) a
JOIN
(
SELECT leases.id as ID1,
leases.commencement as term1,
leases.commencement as start_date1,
leases.execution as execution1
FROM leases 
WHERE leases.commencement 
BETWEEN '2014/01/01' and CURDATE()
)b ON a.commencement=b.commencement

UNION ALL与mysql中的where子句

1 个答案: