ʹÓÃSQLÓï¾äÆô¶¯SQL ServerÍâΧ×é¼þ·þÎñ
-- To allow advanced options to be changed.
EXEC sp_configure 'show advanced options', 1
GO
-- To update the currently configured value for advanced options.
RECONFIGURE
GO
-- To enable the feature.
EXEC sp_configure 'CLR', 0
GO
-- To update the currently configured value for this feature.
RECONFIGURE
GO
Ïà¹ØÎĵµ£º
“Where” ÊÇÒ»¸öÔ¼ÊøÉùÃ÷£¬Ê¹ÓÃWhereÀ´Ô¼ÊøÀ´Ö®Êý¾Ý¿âµÄÊý¾Ý£¬WhereÊÇÔÚ½á¹û·µ»ØÖ®Ç°Æð×÷Óõģ¬ÇÒWhereÖв»ÄÜʹÓþۺϺ¯Êý¡£
“Having”ÊÇÒ»¸ö¹ýÂËÉùÃ÷£¬ÊÇÔÚ²éѯ·µ»Ø½á¹û¼¯ÒÔºó¶Ô²éѯ½á¹û½øÐеĹýÂ˲Ù×÷£¬ÔÚHavingÖпÉÒÔʹÓþۺϺ¯Êý¡£
ÔÚËµÇø±ð֮ǰ£¬µÃÏȽéÉÜGROUP BYÕâ¸ö×Ӿ䣬¶øÔÚ˵GROUP×Ó¾äǰ ......
11.3µ÷ÓųÌÐò/¼õÇá¸ºÔØ
Èç¹ûÆÚÍû¼õÇáÊý¾Ý¿â·þÎñÆ÷ÕûÌåµÄCPU»òÕßI/O¸ºÔØ£¬¿Éͨ¹ýÒÔϲ½ÖèÈ·¶¨×ÊÔ´Ãܼ¯Ð͵ÄSQLÓï¾ä£º
1.Ñ¡ÔñÔÚÓ¦ÓóÌÐòµÄ´¦Àí¸ß·åÆÚ¼ì²â¡£
2.ÔÚÒÔÉÏÖÜÆÚÄÚ£¬ÊÕ¼¯²Ù×÷ϵͳ¼°Oracleͳ¼ÆÐÅÏ¢¡£ÐèÒªÊÕ¼¯µÄOracleͳ¼ÆÐÅÏ¢ÖÁÉÙ°üÀ¨ÎļþµÄI/O£¨Í¨¹ýÊÓͼV$FILESTAT£©£¬ÏµÍ³Í³¼ÆÐÅÏ¢£¨V$SYSSTAT£©£¬ÒÔ¼°SQLͳ¼ÆÐÅÏ¢£ ......
Sql Server ÖÐÒ»¸ö·Ç³£Ç¿´óµÄÈÕÆÚ¸ñʽ»¯º¯Êý
--
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(10 ......
SQL Server ÓÅ»¯ÐÔÄܵö·½Ãæ
(Ò»).Êý¾Ý¿âµÄÉè¼Æ
¿ÉÒԲο´×î½üÂÛ̳ÉϳöÏÖÒ»¸ö¾«»ªÌûhttp://topic.csdn.net/u/20100415/10/a377d835-acbd-4815-8bcb-b367f88ac8b5.html?92227
Êý¾Ý¿âÉè¼Æ°üº¬ÎïÀíÉè ......