复制表结构和数据SQL语句

1.复制表结构及数据到新表

CREATE TABLE 新表 SELECT * FROM 旧表

2.只复制表结构到新表

CREATE TABLE 新表 SELECT * FROM 旧表 WHERE 1=2

即:让WHERE条件不成立.

方法二:(由tianshibao提供)

CREATE TABLE 新表 LIKE 旧表

3.复制旧表的数据到新表(假设两个表结构一样)

INSERT INTO 新表 SELECT * FROM 旧表

4.复制旧表的数据到新表(假设两个表结构不一样)

INSERT INTO 新表(字段1,字段2,.......) SELECT 字段1,字段2,...... FROM 旧表

如果是 SQL SERVER 2008 复制表结构，使用如下方法：

在表上面右击——编写表脚本为:——Create到——新查询编辑器窗口，你也可以保存为sql文件，

新查询编辑器窗口的话在最上面一条把use databasename改成你要复制过去的数据库名称

如果遇到：

IDENTITY_INSERT 设置为 OFF 时,不能向表 'id' 中的标识列插入显式值。

插入数据的时候不要为id列指定值，也就是
insert into table ( ...)语句中,括号中的字段中不要包含id列。

SQL SERVER 2008

 insert into b(a, b, c) select d,e,f from b;

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

 

说明：

 

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来源）

 

SQL:

 

SELECT a.userper, a.tel, a.standfee, TO_CHAR(a.telfeedate, 'yyyy') AS telyear,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '01', a.factration)) AS JAN,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '02', a.factration)) AS FRI,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '03', a.factration)) AS MAR,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '04', a.factration)) AS APR,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '05', a.factration)) AS MAY,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '06', a.factration)) AS JUE,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '07', a.factration)) AS JUL,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '08', a.factration)) AS AGU,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '09', a.factration)) AS SEP,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '10', a.factration)) AS OCT,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '11', a.factration)) AS NOV,

 

SUM(decode(TO_CHAR(a.telfeedate, 'mm'), '12', a.factration)) AS DEC

 

FROM (SELECT a.userper, a.tel, a.standfee, b.telfeedate, b.factration

 

FROM TELFEESTAND a, TELFEE b

 

WHERE a.tel = b.telfax) a

 

GROUP BY a.userper, a.tel, a.standfee, TO_CHAR(a.telfeedate, 'yyyy')

 

说明：四表联查问题：

 

SQL: select * from a left inner join b on a.a=b.b right inner join c on a.a=c.c inner join d on a.a=d.d where .....

 

说明：得到表中最小的未使用的ID号

 

SQL:

 

SELECT (CASE WHEN EXISTS(SELECT * FROM Handle b WHERE b.HandleID = 1) THEN MIN(HandleID) + 1 ELSE 1 END) as HandleID

 

FROM Handle

 

WHERE NOT HandleID IN (SELECT a.HandleID - 1 FROM Handle