sql 2005 ²»Í¬Êý¾Ý¿âµÄÊý¾Ý±í¸´ÖÆ
sql 2005±íµÄ¸´ÖÆÓÐÁ½ÖÖ£ºÒ»ÖÖ¾ÍÊǰÑÕû¸ö±í¸´ÖƹýÈ¥£¬¾ÍºÃÏñ¸´ÖÆÎļþ²¢ÇÒÖØÃüÃû¡£±ðÍâÒ»ÖÖ¾ÍÊǰѱíµÄÄÚÈݸ´Öƹý³ö.
select * into newtable form oldtable;°Ñoldtabel¸´ÖƵ½newtableÇÒnewtable²»´æÔÚ,·ñÔò³ö´í.;
insert into newtable select * from oldtable°ÑoldtableµÄÄÚÈݲåÈëµ½newtable, newtableÒ»¶¨Òª´æÔÚ,²Å¿ÉÒÔ¸´ÖÆ.
Ïà¹ØÎĵµ£º
´ÓTable ±íÖÐÈ¡³öµÚ m Ìõµ½µÚ n ÌõµÄ¼Ç¼£º(Not In °æ±¾)
SELECT TOP n-m+1 *
from Table
WHERE (id NOT IN (SELECT TOP m-1 id from Table ))
--´ÓTABLE±íÖÐÈ¡³öµÚmµ½nÌõ¼Ç¼ (Exists°æ±¾)
SELECT TOP n-m+1 * from TABLE AS a WHERE Not Exists
(Select * from (Select Top m-1 * from TABLE orde ......
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create table tb(id varchar(3) , pid varchar(3) , name varchar(10))
insert into tb values('001' , null , '¹ã¶«Ê¡')
insert into tb values('002' , '001' , '¹ãÖÝÊÐ')
insert i ......
alert index mem_ct monitoring usage;
desc v$object_usage;
set linesize 190
select * from v$object_usage;
SQL>SET AUTOTRACE ON;
¡¡¡¡*autotrace¹¦ÄÜÖ»ÄÜÔÚSQL*PLUSÀïʹÓÃ
¡¡¡¡ÆäËûһЩʹÓ÷½·¨£º
¡¡¡¡2.2.1¡¢ÔÚSQLPLUSÖеõ½Óï¾ä×ܵÄÖ´ÐÐʱ¼ä
¡¡¡¡SQL> set timing on;
2.2.2¡¢Ö»ÏÔʾִÐмƻ®--(»áÍ¬Ê ......
Ò»¡¢ PL/SQLÓïÑÔ¼ò½é
(±¾½²ÒåÖ®ËùÓгÌÐò¾ùµ÷ʽͨ¹ý)
Ê×ÏÈÎÒÃÇ¿´Ò»¸ö¼òµ¥Ö®Àý×Ó,ÏÂÃæÕâ¸öÀý×ÓÊÇͳ¼Æ´Ó1ÖÁ100µÄ×ܺÍ.
declare
i number:=0; /*ÉùÃ÷±äÁ¿¾®¸ø³õÖµ*/
t number:=1;
error_message exception; /*ÉùÃ÷Ò»¸ö³ö´í´¦Àí*/
begin
......
ÓÐʱÎÒÃÇ»áÏñÏÂÃæµÄÇé¿öÒ»Ñù£¬ÎªÖ÷±íµÄıһÌõ¼Ç¼£¬ÔÚÖмä±í(T_Stud_Course ±í)ÖÐͬʱ²åÈë¶àÌõÊý¾Ý
T_Student ±í
Stud_ID
Name
1
Tom
2
Jack
T_Course ±í
Course_ID
Course
1
Chinese
2
English
T_Stud_Course ±í
ID
Stud_ID
Course_ID
1
1
1
2
1
2
3
2
2
ÏÖÔÚÎÒÃÇ¿ÉÒÔÏÂÃæµÄ´æ´¢¹ý³ÌÀ ......