ÇóÒ»sqlÓï¾ä
Óû§±í£ºuser
id name sex
1 ÕÅÈý Å®
2 ÀîËÄ ÄÐ
3 Íõ¶þ ÄÐ
ÎÄÕÂ±í£ºarticle
id fid title
1 1 ÕÅÈýµÄÎÄÕÂ
2 1 ÕÅÈýµÄÎÄÕÂ
3 2 ÀîËĵÄÎÄÕÂ
4 3 Íõ¶þµÄÎÄÕÂ
ÏëÓÃÒ»ÌõsqlÓï¾äµÃµ½ÏÂÃæµÄÁÐ±í£º
Óû§Ãû(name) ÎÄÕÂÊý() ÐÔ±ð(sex)
ÕÅÈý 2 Å®
ÀîËÄ 1 ÄÐ
Íõ¶þ 1 ÄÐ
Äã·¢µ½ÁíÍâÒ»¸ö°æµÄÒѾÓÐÈ˸øÄã»Ø´ðÁË
http://topic.csdn.net/u/20100216/10/9d4b7ebf-c685-43c2-9ed7-500302295295.html
SELECT users.name,COUNT(article.fid),users.sex from users AS users , article AS article WHERE users.id = article.fid GROUP BY article.fid;
SQL code:
select name,sex,count(article.id)
from user left join article on user.id=article.fid
group by name,sex
Ïà¹ØÎÊ´ð£º
ÇëÎÊһϣ¬ÍâÍøÁ½Ì¨SQLSERVERʵÀýÊý¾Ý´«Ê䣬ÓÐûÓвÉÓÃÊý¾ÝѹËõºÍ¼ÓÃÜ¡£Ñ¹Ëõ±ÈÊǶàÉÙ£¬¼ÓÃÜÊÇʲô¼ÓÃÜËã·¨£¿Ïà¹ØÎĵµÄÄÀï¿ÉÒÔÕÒµ½£¿Ð»Ð»
ÎÒÒ²ÏëÖªµÀ£¡¹Ø×¢´ËÌù£¡
¹Ø×¢¡«¡«
Êý¾Ý¿â´óÅ£¶¼ÄÄÈ¥Á˰¡£¿
......
protected void btnLogin_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection("Server = (local);user id = sa;pwd = 1;database = Login");
&nb ......
СµÜ£¬×î½üҪתÐÐÈ¥×öoracle¿ª·¢ÁË£¬ÓÉÓÚ´óѧ±Ïҵʱ£¬×ßÁ˸öÍä·£¬ÏÖÔÚºÜСÐÄ£¬ÎÊÏ£¬×öPL/SQLÓÐûÓÐǰ;£¿£¿£¿
µ±È»ÎÒ˵µÄÕâ¸öǰ;ÊÇÖ¸ ÒÔºóÒªÌø²Û£¬Êг¡¶ÔÕâÑùµÄÈ˲ŵÄÐèÇóÁ¿´ó²»´ó£¿£¿
3q ÄÇ¿´À´»¹Ö»ÄÜÏȽӴ ......
±í
id bh
1 10
2 11
3 12
4 15
5 16
6 22
7 25
8 26
9 27
10 28
½«bh°´Á¬Ðø·Ö¶Î³öÀ´·µ»Ø×Ö·û´®£º
10~12£¬15~16£¬22£¬25~28
SQL code:
declare @t tabl ......
ÈçºÎÔÚSQL2005ÖÐÉ趨¶¨Ê±×÷Òµ£¬±ÈÈç˵¶¨Ê±ÇåÀíijЩ±íµÄÊý¾Ý£¬
»òÕßÊǶ¨Ê±µÄ½«Ä³Ð©±íµÄÊý¾Ýµ¼³öexcel£¡
ÔÚÏߵȴý£¬¼±¼±¼±£¬×îºÃÊÇÏêϸ²½Ö裡
֮ǰÎÒ×öµÄ×÷ÒµÓеãÎÊÌ⣡
°ïUP
²Î¿¼:http://hi.baidu.com/toiota ......