这个查询有什么问题?他们每个人独立工作,但之后我写SELECT *sql查询问题
select * from
(SELECT COUNT(issuer_id) AS INSU_cnt, min_desc AS INSURANCE
FROM issuer INNER JOIN code ON economy_sect = cod_id
WHERE (min_desc = 't')
GROUP BY min_desc)
UNION
(SELECT COUNT(issuer_id) AS Bank_cnt,min_desc AS BANKS
FROM issuer INNER JOIN code ON economy_sect = cod_id
WHERE (min_desc = 'b')
GROUP BY min_desc
)
编辑他们不工作: 我想这个问题是我有所有我想在一个表中的数据(与查询)和我想从表中选择5行...... 我有这个表:
Name Count
Bank 20
Insurance 10
Econ 10
,我想SELECT语句是这样的: 选择bank_count,insurance_count,econ_count 我以为工会可能会解决我的问题,但它没有多大意义...
我知道我可以用一个选择获取数据,但问题是,我想单独表的每一行,所以我想我可以使用UNION做指令... – MNA 2010-08-15 10:19:57
什么是错误? – 2010-08-15 10:22:33
什么是数据库引擎? – gbn 2010-08-15 10:35:18