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

SQLµÝ¹éÁ½ÕÅÊý¾Ý±í

²¿ÃŽṹ
Id name parentId
-----------------
1 ÈËʲ¿ 0
2
¿ª·¢²¿ 1
3 ·þÎñ²¿ 1
Óû§½á¹¹
Id name departId
--------------------
101
ÕÅÈý 2
102 ÀîËÄ 2
103 ÍõÎå 3
ÏëµÃµ½
ID name
parentId
-------------------
1 ÈËʲ¿ 0
2 ¿ª·¢²¿ 1
101
ÕÅÈý 2
102 ÀîËÄ 2
3 ·þÎñ²¿ 1
103 ÍõÎå 3
½â¾ö·½·¨ÈçÏ£º
--------------------------
http://topic.csdn.net/u/20100316/18/759f627f-4d56-4344-aa54-633916ee4f2c.html?11673


Ïà¹ØÎĵµ£º

sql ³£ÓÃ

¹«Ë¾×éÖ¯SQLˮƽ¿¼ÊÔ£¬¿´ÁËд½Ì²Ä£¬Ð´Á˵ã×ܽᷢÉÏÀ´¸ú´ó¼Ò·ÖÏí¡£
ÎÒ¹«Ë¾Ê¹ÓõÄÊÇSybase ASE12.5£¬ËùÒÔÏÂÃæµÄÒ»Ð©ÌØÐÔÊÇÕë¶ÔSybase ASEµÄ¡£
Ò»£ºSQL Bisic
1£ºSQL(Structured Quary Language)ÌØÐÔ£º
a£º±ê×¼»¯
b£º·Ç¹ý³Ì»¯µÄ
c£º¿ÉÓÅ»¯µÄ
d£ºÃæÏò¼¯ºÏ²Ù×÷µÄ
2£ºASEÖеÄÊý¾ÝÀàÐÍ
a£ºNumberic
b£ºCharacter
c£ºDat ......

ÓÃEXPLAIN PLAN ·ÖÎöSQLÓï¾ä

ÈçºÎÉú³Éexplain plan?
¡¡¡¡½â´ð:ÔËÐÐutlxplan.sql. ½¨Á¢plan ±í
¡¡¡¡Õë¶ÔÌØ¶¨SQLÓï¾ä£¬Ê¹Óà explain plan set statement_id = 'tst1' into plan_table
¡¡¡¡ÔËÐÐutlxplp.sql »ò utlxpls.sql²ì¿´explain plan
EXPLAIN PLAN ÊÇÒ»¸öºÜºÃµÄ·ÖÎöSQLÓï¾äµÄ¹¤¾ß,ËüÉõÖÁ¿ÉÒÔÔÚ²»Ö´ÐÐSQLµÄÇé¿öÏ·ÖÎöÓï¾ä. ͨ¹ý·ÖÎö,ÎÒÃǾͿÉÒÔÖ ......

ͨ¹ýÁ½¸öÀý×Ó½²½âPIVOT/UNPIVOTµÄÓ÷¨_SQL¼¼ÇÉ

ʹÓùýSQL Server 2000µÄÈ˶¼ÖªµÀ£¬ÒªÏëʵÏÖÐÐÁÐת»»,±ØÐë×ÛºÏÀûÓþۺϺ¯ÊýºÍ¶¯Ì¬SQL£¬¾ßÌåʵÏÖÆðÀ´ÐèÒªÒ»¶¨µÄ¼¼ÇÉ£¬¶øÔÚSQL Server 2005ÖУ¬Ê¹ÓÃÐÂÒý½øµÄ¹Ø¼ü×ÖPIVOT/UNPIVOT£¬Ôò¿ÉÒÔºÜÈÝÒ×µÄʵÏÖÐÐÁÐת»»µÄÐèÇó¡£
ÔÚ±¾ÎÄÖÐÎÒÃǽ«Í¨¹ýÁ½¸ö¼òµ¥µÄÀý×ÓÏêϸ½²½âPIVOT/UNPIVOTµÄÓ÷¨¡£
PIVOTµÄÓ÷¨£º
Ê×ÏÈ´´½¨²âÊÔ±í£¬È» ......

SQL *PLUS RepostµÄ¿ª·¢·½·¨

SQL *PLUS  RepostµÄ¿ª·¢·½·¨
ʹÓÃSQL*PLUS ¿ÉÖ±½ÓÔÚIE BrowserÖÐÉú³É¹æÕûµÄ×Ö·ûÐÍReport. ʵÏÖ·½·¨¼òµ¥£¬²¼ÊðÈÝÒס£
·½·¨:
1.       ÀûÓÃÎı¾±à¼­Æ÷±àдSQL*PLUS  ½Å±¾£¬±£´æ³É .sql Îļþ¡£
2.       ÉÏ´«sql ÎļþÖÁÓ¦ÓõÄsql Ŀ¼¡£
3.  ......

sql ʱ¼ä¸ñʽת»»

Óï¾ä¼°²éѯ½á¹û£º
SELECT CONVERT(varchar(100), GETDATE(), 0): 05 16 2006 10:57AM
SELECT CONVERT(varchar(100), GETDATE(), 1): 05/16/06
SELECT CONVERT(varchar(100), GETDATE(), 2): 06.05.16
SELECT CONVERT(varchar(100), GETDATE(), 3): 16/05/06
SELECT CONVERT(varchar(100), GETDATE(), 4): 16.05.06
SE ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ