這個查詢有什麼問題?他們每個人獨立工作,但之後我寫SELECT *sql查詢問題
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
)
編輯他們不工作: 我想這個問題是我有所有我想在一個表中的數據(與查詢)和我想從表中選擇5行...... 我有這個表:
Name Count
Bank 20
Insurance 10
Econ 10
,我想SELECT語句是這樣的: 選擇bank_count,insurance_count,econ_count 我以爲工會可能會解決我的問題,但它沒有多大意義...
我知道我可以用一個選擇獲取數據,但問題是,我想單獨表的每一行,所以我想我可以使用UNION做指令... – MNA 2010-08-15 10:19:57
什麼是錯誤? – 2010-08-15 10:22:33
什麼是數據庫引擎? – gbn 2010-08-15 10:35:18