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

ÇóÒ»SQLÓï¾äд·¨

Êý¾Ý¿âÖеÄÊý¾ÝÈçÏ£º
ID          date            summary
0000001    2010-01-01        Ôç°à
0000001    2010-01-01        Íí°à
0000001    2010-01-01        Ò¹°à

ÏëÓÃSQlÓï¾ä²é´¦Êý¾Ý ÈçÏÂËùʾ£º
ID          date            summary1    summary2      summary3
0000001    2010-01-01        Ôç°à        Íí°à          Ò¹°à

ÇëÎÊÈçºÎд´ËÓï¾ä£¿


mark

»Ø¸´ÄÚÈÝÌ«¶ÌÁË£¡

select id,date,
      case summary
      when ¡®Ôç°à¡¯then summarey1,
      when 
      when
from ±í
group by id,date

ÄãºÃ summary ÖеÄÄÚÈÝÎÒÖ»ÊǾٸöÀý×Ó£¬ÄÚÈݲ»È·¶¨µÄŶ£¡

²»Ô¤ÏÈÈ·¶¨,ÎÞ·¨ÓÃsqlÓï¾äд³ö,Óý»²æÊý¾Ý´°¿Ú

¶¯Ì¬µÄ£¬Ö»ÄÜͨ¹ýºǫ́´æ´¢¹ý³ÌʵÏÖ£¬¾²Ì¬µÄ¿ÉÒÔÓÃdecode»òÕßcaseÀ´ÊµÏÖ

ÄÚÈݲ»È·¶¨,Ò»ÌõÓï¾ä¾Í²»¹»ÁË,µÄд´æ´¢¹ý³Ì,»òÕßÓý»²æ±í

Éæ¼°µ½ÐÐÁл¥»»µÄÏÔʾ£¬ÒªÃ´×Ô¼ºÔÚ³ÌÐòÀïת»»£¬Ò²¿ÉÒÔʹÓÃpbÊý¾Ý´°¿ÚÖÐ×îºóÒ»À࣬½»²æ±íÀàÐ͵ÄÊý¾Ý´°¿ÚÀ´ÏÔʾ ¡£

SQL code



Code highlighting produced by Actipro CodeHighlighter (freeware)
http://www.CodeHighlight


Ïà¹ØÎÊ´ð£º

sqlÐÔÄÜÇóÖú - MS-SQL Server / ÒÉÄÑÎÊÌâ

³¡¾°ÈçÏ£º
¿Í»§°Ñ±¸·ÝºÃµÄÊý¾Ý¿â£¬·¢¸øÎÒ£¬ÎÒÔÚ±¾»ú»¹Ô­ºó£¬ÔËÐÐдºÃµÄ´æ´¢¹ý³Ì£¬±È½Ï¿ì£¬²¢ÇÒÔÚʵʩÄDZßÔËÐÐͬÑù±È½Ï¿ì¡£µ«Êǵ±ÊµÊ©ÔÚ¿Í»§ÄDZßÔËÐеÄʱºòËٶȾͷdz£µÄÂý£¬Ê±¼ä³¬³öÁ˳ÌÐòµÄʱ¼äÏÞÖÆ¡£Ô¶³ÌÔÚ¿Í»§ÄÇ ......

pl/sql - Oracle / ¿ª·¢

СµÜ£¬×î½üҪתÐÐÈ¥×öoracle¿ª·¢ÁË£¬ÓÉÓÚ´óѧ±Ïҵʱ£¬×ßÁ˸öÍä·£¬ÏÖÔÚºÜСÐÄ£¬ÎÊÏ£¬×öPL/SQLÓÐûÓÐǰ;£¿£¿£¿
µ±È»ÎÒ˵µÄÕâ¸öǰ;ÊÇÖ¸ ÒÔºóÒªÌø²Û£¬Êг¡¶ÔÕâÑùµÄÈ˲ŵÄÐèÇóÁ¿´ó²»´ó£¿£¿

3q ÄÇ¿´À´»¹Ö»ÄÜÏȽӴ ......

SQL clr - MS-SQL Server / ·Ç¼¼Êõ°æ

ÏëÓÃSQL CLR×öÈçϵĴ洢¹ý³Ì,µ«ÊÇ·¢ÏÖ±¨´í: 
{ÓÉÓÚ´úÂëÒѾ­¹ýÓÅ»¯»òÕß±¾»ú¿ò¼ÜλÓÚµ÷ÓöÑÕ»Ö®ÉÏ£¬ÎÞ·¨¼ÆËã±í´ïʽµÄÖµ¡£} 
¶øÇÒÈç¹ûÊý¾Ý´Ócase 1ͨ¹ýʱ¾ÍÊÇÕýÈ·µÄ,´Ócase 2ͨ¹ýʱ´íÎó 
²¢ÇÒÔÚc ......

sqlÓÅ»¯ - Oracle / »ù´¡ºÍ¹ÜÀí

select count(1) from FX_RETURNBOOKCHECKLIST fxreturnbo0_ where fxreturnbo0_.BOOKID='164 ' AND fxreturnbo0_.RETURNID='00025.S0000001' 
ÉÏÃæÒ»¸ö¼òµ¥µÄSQL,Ö´ÐÐʱ¼ä2.6à ......

sqlserver´íÎó - MS-SQL Server / ÒÉÄÑÎÊÌâ

sqlserver2005 ½¨Á¢µÄÊý¾Ý¿â£¬ÓëÊÖ³Öpda´«ÊäÊý¾Ý£¬×î½üͻȻ³öÏÖÎÞ·¨´«µÝÊý¾ÝµÄÎÊÌ⣬pda¶ËÌáʾµÄ´íÎóʱoutofmemoryexception£¬µ«ÊÇpdaÉÏÃæµÄÈÝÁ¿Ã»ÓÐÎÊÌ⣬
sqlserverµÄÈÕ×ÓÉϵĴíÎóÈçÏ£º
ÈÕÆÚ 2010-1-25 14:45: ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ