Sql ¸ù¾ÝÃû³ÆÌÞ³ýÖØ¸´Êý¾Ý¡¢¸ù¾Ýid·µ»Ø×îеÄ
select *
from (
select soft.NETMODEL,
soft.softname,
soft.softid,
soft.SOFTVER,
soft.createdate,
row_number() over(partition by softname order by softId desc) indexId
from ZTEspt_Soft_File soft
where soft.softkind = 7)
where indexId = 1;
Òª½â¾öµÄÎÊÌâ
Òѽâ¾öµÄЧ¹û
Ïà¹ØÎĵµ£º
1. ¿ÉÒÔÓýű¾±¸·Ý
¡¡¡¡manger studio--ÓÒ¼üÄãµÄÊý¾Ý¿â--ÈÎÎñ--Éú³É½Å±¾
¡¡¡¡Ôڽű¾Éú³ÉÏòµ¼µÄ"Ñ¡Ôñ¶ÔÏóÀàÐÍ"²½ÖèÖÐ, ½«"´æ´¢¹ý³Ì"Ñ¡ÉÏ, ÔÚ½ÓÏÂÀ´µÄ"Ñ¡Ôñ´æ´¢¹ý³Ì"µÄ²½ÖèÖÐ, Ñ¡ÔñËùÓеĴ洢¹ý³Ì(»òÕßÄãÒª¸´ÖƵĴ洢¹ý³Ì)
¡¡¡¡Íê³Éºó, ËùÓд洢¹ý³ÌµÄ½Å±¾»áÉú³ÉÔÚÒ»¸öеIJéѯ´°¿ÚÖÐ, ¹ØµôÉú³É½Å±¾Ïòµ¼, ÔÚÉú³ÉµÄ´æ´¢¹ý³Ì ......
declare @i int
set @i=1
while @i<30
begin
insert into test (userid) values(@i)
set @i=@i+1
end
---------------
while Ìõ¼þ
begin
Ö´ÐвÙ×÷
set @i=@i+1
end
WHILE
ÉèÖÃÖØ¸´Ö´ÐÐ SQL Óï¾ä»òÓï¾ä¿éµÄÌõ¼þ¡£Ö»ÒªÖ¸¶¨µÄÌõ¼þÎªÕæ£¬¾ÍÖØ¸´Ö´ÐÐÓï¾ä¡£¿ÉÒÔʹÓà BREAK ºÍ CONTINUE ¹Ø¼ü×ÖÔÚÑ»·ÄÚ²¿¿ØÖÆ W ......
[MySQLÓÅ»¯] -- ÈçºÎ²éÕÒSQLЧÂʵØÏµÄÔÒò
ʱ¼ä:2010-2-28À´Ô´:HaCMS¿ªÔ´ÉçÇø ×÷Õß:chusong
²éѯµ½Ð§ÂÊµÍµÄ SQL Óï¾ä ºó£¬¿ÉÒÔͨ¹ý EXPLAIN »òÕß DESC ÃüÁî»ñÈ¡ MySQL ÈçºÎÖ´ÐÐ SELECT Óï¾äµÄÐÅÏ¢£¬°üÀ¨ÔÚ SELECT Óï¾äÖ´Ðйý³ÌÖбíÈçºÎÁ¬½ÓºÍÁ¬½ÓµÄ˳Ðò£¬±ÈÈçÎÒÃÇÏë¼ÆËã 2006 ÄêËùÓй«Ë¾µÄÏúÊ۶ÐèÒª¹ØÁª sales ......
תÖÁhttp://mbtk.blog.sohu.com/150003773.html £¬²¢²¹³äһЩÏà¹ØÖªÊ¶¡£
DBCC ErrorLog £ºÈç¹ûºÜÉÙÖØÆðmssqlserver·þÎñ£¬ÄÇô·þÎñÆ÷µÄÈÕÖ¾»áÔö³¤µÃºÜ¿ì£¬¶øÇÒ´ò¿ªºÍ²é¿´ÈÕÖ¾µÄËÙ¶ÈÒ²»áºÜÂý¡£Ê¹ÓÃÕâ¸öÃüÁ¿ÉÒԽضϵ±Ç°µÄ·þÎñÆ÷ÈÕÖ¾£¬Ö÷ÒªÊÇÉú³ÉÒ»¸öеÄÈÕÖ¾¡£¿ÉÒÔ¿¼ÂÇÉèÖÃÒ»¸öµ÷¶ÈÈÎÎñ£¬Ã¿ÖÜÖ´ÐÐÕâ¸öÃüÁî×Ô¶¯½Ø¶Ï·þÎ ......