mysql - 从表中获取符合条件的多条记录

Question

我有两个名为 OFFICE_GROUP 和 OFFICE_IPS 的表，

我想得到像得到 4 行这样的结果:

使用的查询是这样的:

SELECT (SELECT oip.IP as IP FROM OFFICE_IPS oip, OFFICE_GROUP og WHERE og.OFFICE_GROUP_ID = oip.OFFICE_GROUP_ID
         AND og.MODULES like '%1%' lIMIT 1) AS SEMINAR,
(SELECT oip.IP as IP FROM OFFICE_IPS oip, OFFICE_GROUP og WHERE og.OFFICE_GROUP_ID = oip.OFFICE_GROUP_ID
         AND og.MODULES like '%2%'  lIMIT 1)  AS FAQ,
(SELECT oip.IP as IP FROM OFFICE_IPS oip, OFFICE_GROUP og WHERE og.OFFICE_GROUP_ID = oip.OFFICE_GROUP_ID
         AND og.GRP_LIMIT like '%1%'  lIMIT 1)  AS DEV_MODE,
(SELECT oip.IP as IP FROM OFFICE_IPS oip, OFFICE_GROUP og WHERE og.OFFICE_GROUP_ID = oip.OFFICE_GROUP_ID
         AND og.GRP_LIMIT like '%2%'  lIMIT 1)  AS META_API,
(SELECT oip.IP as IP FROM OFFICE_IPS oip, OFFICE_GROUP og WHERE og.OFFICE_GROUP_ID = oip.OFFICE_GROUP_ID
         AND og.GRP_LIMIT like '%3%'  lIMIT 1)  AS TRADING_SIGNAL

但是如果我想获取多行怎么办，我的意思是子查询返回多行。

在上面的查询中，如果我删除“...LIMIT 1”，则会出现如下错误#1242 - 子查询返回多于 1 行

任何人，请帮助我。

Answer 1

您应该在顶级查询的 FROM 部分而不是 SELECT 中执行子查询。尝试这样做

SELECT seminar, faq, dev_mode, meta_api, trading_signal 
FROM (subselect) as seminars_table, (subselect) as faq_table.... 
WHERE join_contition_1 and join_condition_1;

子选择需要包含连接列。