设计创意栏目是一个分享最好最实用的教程的社区,我们拥有最用心的各种教程,今天就给大家分享精妙的SQL和SQL SERVER 与ACCESS、EXCEL的数据导入导出转换的教程,热爱PS的朋友们快点看过来吧!
* 说明:复制表(只复制结构,源表名:a 新表名:b)
select * into b from a where 11
* 说明:拷贝表(拷贝数据,源表名:a 目标表名:b)
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
select ,, from table a,(select max(adddate) adddate from table where ) b
* 说明:外连接查询(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
* 说明:日程安排提前五分钟提醒
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
delete from info where not exists ( select * from infobz where )
* 说明:--
SQL:
Select A.NUM, , ,
FROM TABLE1,
(Select X.NUM, , 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 + NVL(,) ) B
Where A.NUM = B.NUM
* 说明:--
select * from studentinfo where not exists(select * from student where ) and 系名称=""&strdepartmentname&"" and 专业名称=""&strprofessionname&"" order by 性别,生源地,高考总成绩
* 从数据库中去一年的各单位电话费统计(电话费定额贺电化肥清单两个表