说明：复制表(只复制结构,源表名：a 新表名：b)
SQL: select * into b from a where 1<>1
说明：拷贝表(拷贝数据,源表名：a 目标表名：b)
SQL: insert into b(a, b, c) select d,e,f from b;
说明：显示文章、提交人和最后回复时间
SQL: select a.title,a.username,b.adddate from table a,(select max(adddate) adddate from table where table.title=a.title) b
说明：外连接查询(表名1：a 表名2：b)
SQL: select a.a, a.b, a.c, b.c, b.d, b.f from a LEFT OUT JOIN b ON a.a = b.c
说明：日程安排提前五分钟提醒
SQL: select * from 日程安排 where datediff('minute',f开始时间,getdate())>5
说明：两张关联表，删除主表中已经在副表中没有的信息
SQL:
delete from info where not exists ( select * from infobz where info.infid=infobz.infid )
说明：--
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
说明：--
SQL:
select * from studentinfo where not exists(select * from student where studentinfo.id=student.id) and 系名称='"&strdepartmentname&"' and 专业名称='"&strprofessionname&"' order by 性别,生源地,高考总成绩
本文转自loveme2351CTO博客，原文链接： http://blog.51cto.com/loveme23/7940
，如需转载请自行联系原作者
