SQL SERVER ÈÕÆÚ¸ñʽ
³£Ó㺠Select CONVERT(varchar(100), GETDATE(), 8): 10:57:46
Select CONVERT(varchar(100), GETDATE(), 24): 10:57:47
Select CONVERT(varchar(100), GETDATE(), 108): 10:57:49
Select CONVERT(varchar(100), GETDATE(), 12): 060516 Select CONVERT(varchar(100), GETDATE(), 23): 2006-05-16
Ïà¹ØÎĵµ£º
Microsoft SQL Server 2008 ¶Ô T-SQL ÓïÑÔ½øÐÐÁ˽øÒ»²½ÔöÇ¿¡£ÎªÁËÈÿª·¢ÈËÔ±¾¡¿ìÁ˽âÕâЩ±ä»¯£¬ÎÒÃÇÕë¶Ô 2007 Äê 6 Ô CTP °æ±¾µÄ SQL Server 2008 ÖÐµÄ T-SQL ÓïÑÔµÄÐÂÔö¹¦ÄܽøÐÐÁË·ÖÎöºÍ³¢ÊÔ¡£±¾ÎÄÃèÊö×Ô SQL Server 2008 CTP1 ÒÔÀ´ÕâЩÓïÑÔÔöÇ¿ºÍ±ä»¯¡£
¡¡¡¡±¾Îİüº¬ÈçÏÂÄÚÈÝ£º
¡¡¡¡· T-SQL Ðй¹ÔìÆ÷
¡¡¡¡&mid ......
Ëø»úÖÆ
NOLOCKºÍREADPASTµÄÇø±ð¡£
1. ¿ªÆôÒ»¸öÊÂÎñÖ´ÐвåÈëÊý¾ÝµÄ²Ù×÷¡£
BEGIN TRAN t
INSERT INTO Customer
SELECT 'a','a'
2. Ö´ÐÐÒ»Ìõ²éѯÓï¾ä¡£
SELECT * from Customer WITH (NOLOCK)
½á¹ûÖÐÏÔʾ"a"ºÍ"a"¡£µ±1ÖÐÊÂÎñ»Ø¹öºó£¬ÄÇôa½«³ÉΪÔàÊý¾Ý¡£(×¢:1ÖеÄÊÂÎñδÌá½») ¡£NOLOCK±íÃ÷ûÓжÔÊý¾Ý±íÌí¼Ó¹²Ï ......
¶à±íÁª½Ó²éѯ
Ò»¡¢¶à±íÁª½Ó²éѯµÄ·ÖÀà
¶à±íÁª½Ó²éѯʵ¼ÊÉÏÊÇͨ¹ý¸÷¸ö±íÖ®¼ä¹²Í¬ÁеĹØÁªÐÔÀ´²éѯÊý¾ÝµÄ£¬ËüÊǹØÏµÊý¾Ý¿â²éѯ×îÖ÷ÒªµÄÌØÕ÷¡£
Áª½Ó²éѯ¿É·ÖΪÈý´óÀ࣬·ÖÁíΪ£º
1£® ÄÚÁª½Ó¡£
2£® ÍâÁª½Ó¡£
3£® ½»²æÁª½Ó¡£
ÄÇôÎÒÃÇÒ»ÆðÀ´¿´Ò»ÏÂÈçºÎʹÓö ......
1.ʲô½ÐSQL×¢È룿ÈçºÎ·ÀÖ¹£¿Çë¾ÙÀý˵Ã÷
´ð£ºSQL×¢ÈëÊdz£¼ûµÄÀûÓóÌÐò©¶´½øÐй¥»÷µÄ·½·¨¡£µ¼ÖÂsql×¢Èë¹¥»÷²¢·ÇϵͳÔì³ÉµÄ£¬Ö÷ÒªÊdzÌÐòÖкöÂÔÁ˰²È«ÒòËØ£¬ÀûÓÃsqlÓïÑÔ©¶´»ñµÃºÏ·¨Éí·ÝµÇ½ϵͳ
ÀýÈ磺
"Select * from users where name='"+uName+"' and pwd='"+uPwd+"' " ......