Õâ¸ösqlÓï¾äÔõôд°¡
Ħ¸ù֪ʶÌö¨Ê±ÈÎÎñ ¸Ä³É ×¢Èëservice
±ít
ÓÐ×ֶΣºÃû³Æ,ʱ¼äºÍÆäËû×Ö¶Î
name----time
a-------2006
a-------2007
a-------2008
a-------2009
b-------2007
b-------2008
c-------2007
c-------2008
c-------2009
ÒªÇó²é³öµÄ½á¹û£º
°´Ãû³Æ£¬Ò²¾ÍÊÇa,b,cÈ¡³öÈÕÆÚÏàͬ×î´ó¼Ç¼£¬ÒªÇóÈÕÆÚ±ØÐëÊÇÏàͬµÄ¡£
°´ÉÏÃæµÄÊý¾Ý¾ÍÊÇ
a----2008
b----2008
c----2008
±¾À´Ó¦¸ÃÈ¡2009µÄÊý¾Ý£¬µ«ÒòΪbûÓÐ2009µÄÊý¾Ý£¬ËùÒÔ¾ÍÈ¡2008µÄ¡£a£¬b£¬c¶¼ÓÐ2008µÄÊý¾Ý¡£Èç¹ûij¸öûÓÐ2008µÄÄÇ»¹ÒªÔÙÍËÈ¡2007µÄ....
sqlÓï¾äÔõôд°¡£¬SQLSERVERµÄ£¬¸ßÊÖÖ¸½Ì¡£
SQL code:
DECLARE @TB TABLE(name VARCHAR(10),time INT)
INSERT @TB
SELECT 'a',2006 UNION ALL
SELECT 'a',2007 UNION ALL
SELECT 'a',2008 UNION ALL
SELECT 'a',2009 UNION ALL
SELECT 'b',2007 UNION ALL
SELECT 'b',2008 UNION ALL
SELECT 'c',2007 UNION ALL
SELECT 'c',2008 UNION ALL
SELECT 'c',2009
SELECT top 1 TIME from
(SELECT * from @TB T1
WHERE EXISTS(SELECT 1 from @TB WHERE TIME=T1.TIME AND NAME<>T1.NAME))AS T
group by time
having count(*)=(select count(distinct name) from @tb ) order by time desc
£¨ËùÓ°ÏìµÄÐÐÊýΪ 9 ÐУ©
TIME
-----------
2008
£¨ËùÓ°ÏìµÄÐÐÊýΪ 1 ÐУ©
SQL code
Code highlighting produced by Actipro CodeHighlighter (freeware)
http://www.
Ïà¹ØÎÊ´ð£º
Ö´ÐеÄ˳Ðò£º
1£©Îļþä¯ÀÀ¿ò£¨Ñ¡ÔñÎļþʹÓã©
Ñ¡ÔñºÃÎļþºó
µã»÷Ò»¸öµ¼Èë°´Å¥µÄʱºò £¬°ÑÉÏÃæÉÏ´«¿òÀïµÄcsvÎļþÒÔÒ»¸öIDΪÎļþÃû£¬ÉÏ´«µ½**/**Îļþ¼ÐÏÂ
2£©¶ÁÈ¡Õâ¸öÎļþ¼ÐϵÄcsvµÄÎļþ£¬×ª»»³Ésql
3 ......
±íÈçÏÂ
½ÌÊÒID ×ùλÊý ¿ªÊ¼Ê±¼ä ½áÊøÊ±¼ä 2009Äê1ÔÂ1ÈÕ 2009Äê1ÔÂ2ÈÕ 2009Äê1ÔÂ3ÈÕ
101 50 08£º00 08£º30 30 40 50
101 50 09£º00 ......
select convert(varchar(50),cast(convert(numeric(18,2),1275674000000/100000000)as real))+'ÒÚ'
select cast(convert(numeric(18,2),1275674000000/100000000)as real)
ΪʲôÉÏÒ»¸öÓÃvarcharת»»ºó¾ÍÖ»±£ÁôÁËÒ ......
table1:
uID uName
1 СÀî
2 СÕÅ
table2:
pID uID type
1 1 H1
2   ......