精妙的SQL和SQL SERVER 與SQL SERVER 的數據導入導出轉換 SQL數據庫
關鍵字：SQL SQL SERVER 數據導入導出轉換
今天做個行列轉換 找到的好語句 解決了我的問題 * 說明：復制表(只復制結構,源表名：a 新表名：b)
select * into b from a where 1<>1
* 說明：拷貝表(拷貝數據,源表名：a 目標表名：b)
insert into b(a, b, c) select d,e,f from b;
* 說明：顯示文章、提交人和最后回復時間
select a.title,a.username,b.adddate from table a,(select max(adddate) adddate from table where table.title=a.title) b
* 說明：外連接查詢(表名1：a 表名2：b)
select a.a, a.b, a.c, b.c, b.d, b.f from a LEFT OUT JOIN b ON a.a = b.c
* 說明：日程安排提前五分鐘提醒
select * from 日程安排 where datediff('minute',f開始時間,getdate())>5
* 說明：兩張關聯表，刪除主表中已經在副表中沒有的信息
delete from info where not exists ( select * from infobz where info.infid=infobz.infid )
* 說明：--
SQL:
SELECT A.NUM, A.NAME, B.UPD_DATE, B.PREV_UPD_DATE
FROM TABLE1,
(SELECT X.NUM, X.UPD_DATE, Y.UPD_DATE PREV_UPD_DATE
FROM (SELECT NUM, UPD_DATE, INBOUND_QTY, STOCK_ONHAND
FROM TABLE2
WHERE TO_CHAR(UPD_DATE,'YYYY/MM') = TO_CHAR(SYSDATE, 'YYYY/MM')) X,
(SELECT NUM, UPD_DATE, STOCK_ONHAND
FROM TABLE2
WHERE TO_CHAR(UPD_DATE,'YYYY/MM') =
TO_CHAR(TO_DATE(TO_CHAR(SYSDATE, 'YYYY/MM') || '/01','YYYY/MM/DD') - 1, 'YYYY/MM') ) Y,
WHERE X.NUM = Y.NUM (+)
AND X.INBOUND_QTY + NVL(Y.STOCK_ONHAND,0) <> X.STOCK_ONHAND ) B
WHERE A.NUM = B.NUM
* 說明：--
select * from studentinfo where not exists(select * from student where studentinfo.id=student.id) and 系名稱='"&strdepartmentname&"' and 專業名稱='"&strprofessionname&"' order by 性別,生源地,高考總成績
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