Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

SQL²éѯÿËùѧУÓïÎijɼ¨×î¸ßµÄѧÉúÐÅÏ¢

Êý¾Ý¿â ÓÐÁ½Õűí
±í1£º student
±í2£ºchinese
ÏÖÔÚÒª·Ö±ðÁгö ÿËùѧУ ÓïÎijɼ¨×î¸ßµÄ ѧÉúÐÅÏ¢
SQL £º
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
Ö´Ðнá¹û£º
PS:  SQL Óï¾äÒ²ÊÇÔÚѧϰÖС£¿ÉÄÜдµÄÒ²²»ÊǺܺà ÌùÉÏÀ´·½±ãÏñÎÒÕâÑùµÄ²ËÄñ½è¼øÒ»Ï ÈçÓиüºÃµÄ·½Ê½ Ï£Íû»Ø¸´¸æËßÎÒһϡ£±¾È˽«Íò·Ö¸Ð¼¤¡£


Ïà¹ØÎĵµ£º

SQL SERVER 2008 ѹËõ±¸·Ý

/*
    SQL SERVER 2008 ѹËõ±¸·Ý
 
 
 
    SQL SERVER 2008 ÔÚÆóÒµ°æºÍ¿ª·¢°æÖÐÒýÈëÁ˱¸·ÝѹËõ.ʹÓÃÕ߸ö¹¦ÄÜ¿ÉÒÔ¸ü¿ìËٵı¸·ÝÊý¾Ý¿â²¢ÇÒ
    ÏûºÄ¸üÉٵĴÅÅ̿ռä.ѹËõÁ¿ÒÀÀµÓÚÊý¾Ý¿âÖд洢µÄÊý¾Ý.ÀýÈç,º¬ÓÐÖØ¸´Öµ×Ö·ûÊý¾ÝµÄÊý¾Ý¿â¿ÉÒÔÓÐ
   ......

sql ×óÁ¬½Ó ½âÊÍ

Á¬½Ó²éѯ£¬¾ÍÊǽ«
Á½¸ö»ò¶à¸ö
±í»òÊÓͼ
ͨ¹ýÒ»¶¨µÄÌõ¼þ
½«È«²¿»ò²¿·Ý×Ö¶Î
È«²¿»ò²¿·Ý¼Ç¼
Á¬½Óµ½Ò»Æð£¬µÃµ½Ò»¸öеÄÊý¾Ý¼¯ºÏ¡£
È磺ÓÐÈËÔ±µµ°¸ºÍ¹¤×ʵµ°¸Á½¸ö±í£¬Á½¸ö±íÓй²Í¬µÄ¹Ø¼ü×Ö¶ÎXMDM(ÐÕÃû´úÂ룩£¬ÆäÖÐÈËÔ±µµ°¸´æ´¢ÁËÈËÊÂ×ÊÁÏ£¬¹¤×ʵµ°¸´æ´¢ÁËн³ê×ÊÁÏ¡£
Òò´Ë¿ÉÒÔͨ¹ýXMDM×ֶν«Á½¸ö±íÁ¬½ÓÆðÀ´£¬´Ó¶øÊ¹²éѯ½ ......

SQL SERVER 2005Ⱥ¼¯


SQL SERVER 2005µÄȺ¼¯±ØÐëÔÚʵÏÖÁËWINDOWSȺ¼¯µÄ»ù´¡ÉϲſÉÒÔ¡£
Ê×ÏÈÎÒÃÇÏÈÀ´¿´Ò»ÏÂSQL SERVER 2005Ⱥ¼¯µÄһЩÏà¹Ø½éÉÜ£º
ÔÚSQL SERVER 2005ÖÐÖ÷Òª¿ÉÒÔʹÓþµÏñºÍȺ¼¯Á½ÖÖ·½·¨À´ÊµÏָ߿ÉÓÃÐÔ£¬ÖÁÓÚÊý¾Ý¿â¾µÏñ×÷ΪSQL SERVER 2005µÄÐÂÌØÐÔÖ®Ò»£¬ÎÒÔÚÇ°ÃæµÄ²©ÎÄÒѾ­×öÁ˽éÉÜ£¬½ñÌìÎÒÃǾÍÀ´¿´Ò»ÏÂȺ¼¯µÄÅäÖ÷½·¨£ºµ±È»Ëüà ......

sql»Ö¸´xp_regread

sql»Ö¸´xp_regread
ɾ³ýµôxp_regreadºó£¬·¢ÏÖÒÔǰµÄ×÷Òµ²»Äܲ鿴£¬Ö»ÄÜÈ¥»Ö¸´ÁË¡£
exec sp_addextendedproc 'Xp_dirtree','xpstar.dll'    »Ö¸´ºó·¢ÏÖ²»ÄÜʹÓÃ
ÕÒµ½dbcc addextendedproc ("Xp_regread","xpstar.dll") »¹ÊDz»ÄÜʹÓÃ
ºóÀ´²Å·¢ÏÖ»Ö¸´µÄʱºòÒªÓÃСдdbcc addextended ......

OracleÈçºÎÖ´ÐÐÅúÁ¿sqlÓï¾ä

Òª´´½¨Á½¸öÎļþ
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 ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ