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http://blog.csdn.net/fenglibing/archive/2007/10/24/1841537.aspx
1¡¢½«Ò»¸ö±íÖеÄÄÚÈÝ¿½±´µ½ÁíÍâÒ»¸ö±íÖÐ
insert into testT1(a1,b1,c1) select a,b,c from test;
insert into testT select * from test; (Ç°ÌáÊÇ兩個±íµÄ結構ÍêÈ«Ïàͬ)
insert into notebook(id,title,content)
select notebook_sequence.NEXTVAL,first_name,last_name from students;
×¢:a1,b1,c1ÊÇ現ÔÚ±íÖеÄ×Ö¶ÎÃû¡£A,b,cÊÇÔ±íÖеÄ×Ö¶ÎÃû
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insert into a (select '123' as id, temp,temp2 from b where id=10)
2¡¢²éÕÒÖظ´¼Ç¼
SELECT DRAWING,DSNO from EM5_PIPE_PREFAB
WHERE ROWID!=(SELECT MAX(ROWID) from EM5
_PIPE_PREFAB D
WHERE EM5_PIPE_PREFAB.DRAWING=D.DRAWING AND
EM5_PIPE_PREFAB.DSNO=D.DSNO);
3¡¢É¾³ýÖظ´¼Ç¼
DELETE from EM5_PIPE_PREFAB
WHERE ROWID!=(SELECT MAX(ROWID) from EM5
_PIPE_PREFAB D
WHERE EM5_PIPE_PREFAB.DRAWING=D.DRAWING AND
EM5_PIPE_PREFAB.DSNO=D.DSNO);
4¡¢復ÖƱí結構
ÔÚORACLEÖÐ: create table new_table as select * from old_table where rownum < 1;
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¡¡¡¡SQL: select * into b from a where 1<>1 ¡¡
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5¡¢Ò»´Î刪³ý¶à個×Ö¶Î
alter table TEST_A drop (TEST_num,test_name);
6¡¢實現Ò»個±íµÄ備·Ý
create table tableName_bak as select * from tableName;
7¡¢創½¨兩個±íµÄÖ÷Íâ鍵關聯
--ÏÈ創½¨Ö÷±í
create table t1(id int,stu_name varchar(50));
--為Ö÷±íÔö¼Ó³Ö¾ÃµÄÖ÷鍵約Êø
alter table t1 add(constraint t1_id primary key(id) deferrable);
--創½¨從±í£¬²¢將從±íµÄid設為Ö÷鍵
create table t2(id int primary key,sex varchar(10),address varchar(50));
--為從±íÔö¼ÓÍâ鍵約Êø£¬該約Êø來×ÔÓÚÖ÷±íËù創½¨µÄ約Êø×Ö¶Î
--當從Ö÷±íÖÐ刪³ý記錄時£¬×Ô動刪³ý從±íÖÐ與Ö®Ïà對µÄ¾ßÓÐÏàͬidµÄ記錄
--Ĭ
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DECLARE MyCursor cursor /* ÉùÃ÷Óα꣬ĬÈÏΪµ¥´¿ÏòÇ°µÄÓαꡣÈç¹ûÏëҪǰºóÌøÀ´ÌøÈ¥µÄ£¬Ð´³ÉScroll Cursor¼ ......
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CREATE DATABASE student
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DROP DATABASE student
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BACKUP DATABASE student to disk=´c:S4.bak´
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RESTORE DATABASE studnet from DISK = ´c:S4.bak´
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CREATE TABLE Students (
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select groupname,totalnum,inputdate,groupid into #temp from
(select count(*)as totalnum,p.groupid,g.groupname,convert(nvarchar(10),inputdate,120) as 'inputdate'
from person p left join admin_group g on p.groupid = g.groupid and deleteflag = '0'
where p.inactive=' ......