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

accessÖÐdistinctµÄÓ÷¨

ÎÒÓõÄaccess2003£¬±íÊý¾ÝÈçÏ£º

col1 col2
zhao 22
zhang 33
zhao 14
zhao 12

Ï£Íû¶ÁÈ¡col1²»Öظ´µÄËùÓÐ×ֶΣ¬¶øÇÒÖ»¶Á²»Öظ´µÄcol1µÄËùÓмǼµÄµÚÒ»Ìõ£¬°´ÕÕcol2ÅÅÐò£¬sqlÓï¾ä¸ÃÔõôд£¿

½á¹ûÓ¦¸ÃÊÇ£º

col1 col2
zhang 33
zhao 12

ÒýÓÃ
²Î¿¼
Èç¹ûÊÇÀàËÆÏÂÃæµÄ²éѯÓï¾ä,¾ÍûÎÊÌâ: 
  select  distinct  ×ֶΠ from  ±í 
   
   
  Èç¹ûÊÇÓÃÔھۺϺ¯ÊýÖÐ,¾Í²»Ö§³Ö. 
  select  count(distinct  ×Ö¶Î)  from  ±í


Ò²¿ÉÒÔתÍäÒ»ÏÂд¸ö¼æÈÝmssqlºÍaccess µÄ´úÂë
select count(*) from T group by ×Ö¶Î

select col1 from tab group by col1
select count(*) as tab from (select distinct a from tab )

ÒÔÉÏÎÒûÊԳɹ¦£¬Çë×¢Ò⣬Èç¹ûÓÐ3Ìõ¼Ç¼µÄcol1ÊÇÖØ¸´µÄ£¬ÄÇôֻ¶ÁȡһÌõ¼Ç¼

ÕâÀïÃæÃ»ÓÐÉæ¼°µ½ÇóºÍ£¬Ö»ÊǶÁ³öÀ´²»Öظ´Ä³×ֶεÄËùÓмǼ£¬µ±È»¸Ã¼Ç¼Ҫ°üÀ¨ËùÓÐ×Ö¶Î


Ïà¹ØÎÊ´ð£º

Access²éÕÒÖØ¸´ÎÊÌâ - ÆäËûÊý¾Ý¿â¿ª·¢ / Access

ÎÒÓÃAccessÊý¾Ý¿â×öÁËÒ»¸öͼÊéÊý¾Ý¿â£¬ÀïÃæÓÐÒ»¸ö×Ö¶ÎÊÇISBN£¬¾ÍÊÇISBNºÅ£¬µ«ÊÇÖ»µÄÒ»×Ü·ÖͼÊéдµÄISBNºÅ£¬ÓеÄûд£¬Ð´µÄÄÇÒ»²¿·ÖÓеÄISBNÊÇÖØ¸´µÄ£¬ÄÜ·ñÓÃSQLÓïÑÔ°ÑÖØ¸´µÄ¹ýÂ˵ô£¬µ«Ã»Ð´ISBNºÅµÄͼÊé²»ÄܹýÂ˵ô£¬È ......

ACCESSÎı¾¿ò³¤¶ÈÊǶàÉÙ? - ÆäËûÊý¾Ý¿â¿ª·¢ / Access

ÎÒ½«Ò»¶Î4000À´×ÖµÄÎı¾¸³Öµ¸øËüÔõô¾Í³ö´íÁË,ÌáʾÔËÐÐʱ´íÎó2176 Õâ¸öÊôÐÔµÄÉèÖÃֵ̫³¤?
ÄãÊÇÔõÑù¸³ÖµµÄ£¿

²âÊÔÁËһϣ¬Óñ¸×¢×ֶθøÎı¾¿ò×öÊý¾ÝÔ´£¬Ã»ÓÐÌáʾÉèÖÃֵ̫³¤,14893×Ö·û

ÒýÓÃÎÒ½«Ò»¶Î4000À´×ÖµÄÎ ......

aspÁ¬½ÓACCESSÊý¾Ý¿âµÄÎÊÌ⣡£¡

×î½üѧϰasp£¬µ±Á·Ï°µ½Á¬½ÓÊý¾Ý¿âµÄʱºò£¬ÆµÆµ³ö´í£¬¿É¾ÍÊDz»ÖªµÀ´íÔÚÔõôµØ·½£¬Çë¸ßÊÖ°ïæ¿´¿´£¡£¡Ð»Ð»£¡
°üº¬Îļþxx.asp¡¢xxsave.asp¡¢conn.aspÒÔ¼°student1.mdbºÍ±íxxgl¡­¡­
xx.aspΪ£º
<html>
<hea ......

dOOdads Á¬½Ó ACCESS µÄÊý¾Ý·ÖÒ³ÎÊÌâ

ÈçÌâ dOOdads Á¬½Ó ACCESS µÄÊý¾Ý·ÖÒ³ÎÊÌ⣡
ʹÓà dOOdads Á¬½Ó ACCESSÊý¾ÝµÄʱºò Êý¾Ý·ÖÒ³µÄÎÊÌ⣡
¸ù¾ÝÕâ¸ö¸Ä°É
C# code:

public static Product[] SearchProducts(string keyword, int categoryID, int pa ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ