復制表結構和數據SQL語句


1.復制表結構及數據到新表

CREATE TABLE 新表 SELECT * FROM 舊表
如我使用的:CREATE TABLE DM_ZRR_QX_GNS AS SELECT * FROM DM_QX_GNS

2.只復制表結構到新表

CREATE TABLE 新表 SELECT * FROM 舊表 WHERE 1=2

即:讓WHERE條件不成立.

方法二:(由tianshibao提供)

CREATE TABLE 新表 LIKE 舊表

3.復制舊表的數據到新表(假設兩個表結構一樣)

INSERT INTO 新表 SELECT * FROM 舊表

4.復制舊表的數據到新表(假設兩個表結構不一樣)

INSERT INTO 新表(字段1,字段2,.......SELECT 字段1,字段2,...... FROM 舊表
如果是 SQL SERVER 2008 復制表結構,使用如下方法:
在表上面右擊——編寫表腳本為:——Create到——新查詢編輯器窗口,你也可以保存為sql文件,
新查詢編輯器窗口的話在最上面一條把use databasename改成你要復制過去的數據庫名稱
如果遇到:

IDENTITY_INSERT 設置為 OFF 時,不能向表 'id' 中的標識列插入顯式值。

插入數據的時候不要為id列指定值,也就是
insert into table ( ...)語句中,括號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;
說明:復制表(只復制結構,源表名:a 新表名:b) 
SQL: 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)
 
SQL: 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
 
SQL: 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)
 
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
 
說明:日程安排提前五分鍾提醒
 
SQL: 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
 
SQL:
 
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:--
 
SQL:
 
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
 
說明:
 
從數據庫中去一年的各單位電話費統計(電話費定額賀電化肥清單兩個表來源)
 
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' )
 
說明:四表聯查問題:
 
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 .....
 
說明:得到表中最小的未使用的ID號
 
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


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