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±í1£º student
±í2£ºchinese
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SELECT *
from student
LEFT JOIN chinese ON student.no = chinese.no
WHERE chinese.chengji
IN (
SELECT max( chinese.chengji )
from student
LEFT JOIN chinese ON student.no = chinese.no
GROUP BY student.school
ORDER BY chinese.chengji DESC
)
LIMIT 0 ,30
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/*
SQL SERVER 2008 ѹËõ±¸·Ý
SQL SERVER 2008 ÔÚÆóÒµ°æºÍ¿ª·¢°æÖÐÒýÈëÁ˱¸·ÝѹËõ.ʹÓÃÕ߸ö¹¦ÄÜ¿ÉÒÔ¸ü¿ìËٵı¸·ÝÊý¾Ý¿â²¢ÇÒ
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alter table tablename modify(name ,varchar2(10)) Áпí¶È²»µÃСÓÚÐÞ¸ÄǰµÄ¿í¶È
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ÊÓͼ v$logfile
alter database add logfile 'd:\orcl01.log' size 10m;//Ìí¼Ó×é
alter database add logfile member 'd:\orcl02.log' to group 4;//Ïò4×éÖÐÌí¼Ó³ÉÔ±
alter database drop logfile member 'd: ......
USE StudentInfo
--=====================================================
--Author £ºyangjuncheng
--Create Date:2010.5.26
--Decription :¸ø±íÌí¼ÓÔ¼Êø£¨¿ÉÒÔÔÚ´´½¨±íʾֱ½ÓÌí¼Ó
-- Ò²¿ÉÒÔʹÓÃalter¹Ø¼ ......
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1.null º¯Êý
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select ename,sal+isnull(comm,0)
from emp
go
isnull(comm,0)µÄÓ÷¨ÊÇ£º commΪnull Ôò·µ»Ø0 ·ñÔòΪ commµÄÖµ¡£
2.V ......
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1: runBatch.bat
2: sql.txt
runBatch.bat ÄÚÈÝÈçÏ£º
sqlplus username/password @sql.txt
pause
sql.txtÄÚÈÝÈçÏ£º
spool sql.log
create table t1(cname char(20));
insert into t1(cname) values('test');
select * from t1;
spool off
exit
Ë«»÷runBatch.bat¾Í¿ÉÒÔÅúÁ¿Ö´ÐÐsql.txtÖÐ ......