Çë½Ì¸÷λ´ó¸çÒ»¸öSqlÎÊÌ⣬Äĸö°à¼¶µÄ½Ìʦ´ýÓö×î¸ß£¿
СµÜ×î½üÓöµ½Ò»¸öÎÊÌ⣬ҪÇóµÃ³öÄĸö°à¼¶µÄ½Ìʦ´ýÓö×î¸ß£¬°Ñͬһ¸ö°à¼¶µÄ½Ìʦ´ýÓöºÏ¼ÆÆðÀ´
°à¼¶±í ½Ìʦ±í
°à¼¶ID ½ÌʦID
°à¼¶Ãû×Ö °à¼¶ID
½Ìʦ´ýÓö
Ê×ÏÈÏëµ½µÄÊÇÓÃMAX£¨´ýÓö£©,µ«ÊÇÖ»Äܵóö´ýÓö×î¸ßµÄ½Ìʦ£¬ºóÏëһϣ¬ºÃÏñÖ»Óд洢¹ý³Ì²ÅÄÜ´¦Àí£¬¶øÇÒ´æ´¢¹ý³ÌÖл¹ÒªÑ»·´¦Àí°à¼¶ÊýºÍ½ÌʦÊý£¬±È½ÏÂé·³¡£
×îºóÒªÇó°´ÕÕ´ýÓö×î¸ßµÄ°à¼¶ÅÅÐòÏÂÀ´¡£
²»ÖªµÀ¸÷λ´ó¸çÓÐûÓкõÄ˼·ºÍ·½·¨£¬×îºÃµÄÊÇÒ»¾äSql¾ÍÄÜÍê³ÉµÄ¡£ÈçÓдúÂë¸üºÃ£¬Ð»Ð»ÁË
select °à¼¶ID,sum(½Ìʦ´ýÓö)
from ½Ìʦ±í
group by °à¼¶ID
order by 2 desc
SQL code:
select °à¼¶Ãû×Ö,sum(½Ìʦ´ýÓö)
from ½Ìʦ±í ,°à¼¶±í
where ½Ìʦ±í.°à¼¶ID = °à¼¶±í.°à¼¶ID
group by °à¼¶Ãû×Ö
order by 2 desc
SQL code:
select m.* , avg(n.½Ìʦ´ýÓö) ½Ìʦ´ýÓö from °à¼¶±í m , ½Ìʦ±í n where m.°à¼¶ID = n.°à¼¶ID group by m.°à¼¶ID,°à¼¶Ãû×Ö order by ½Ìʦ´ýÓö desc
ÊÇÓÃavg°É?ƽ¾ù´ýÓö°É?
²»ÊÇÓÃsum.
SQL code
{
Ïà¹ØÎÊ´ð£º
Á½ÖÖ´íÎó£º
1.Èç¹ûÎÒÕâÑùÉêÃ÷£ºResultSet rs;´íÎóÌáʾÈçÏ£º
An error occurred at line: 51 in the jsp file: /index.jsp
The local variable rs may not have been initialized
48: ......
sql2005
select *from v_ddxx where d_sfsc='0' and (g_ssbm='1001' or g_ssbm='1002') and (xxf>0 and xxfwzf <>0 ),Ö´ÐÐËÙ¶ÈÂýµÄÒªËÀ£¬µ«ÊÇÈç¹û°Ñ(xxf>0 and ......
PBÖпª·¢µÄ¡£
DateTime startTime=DateTime(em_1.Text)
DateTime endTime=DateTime(em_2.Text)
string sql
sql = dw_1.GetSQLSelect()+"Where (StartTime> '"+startTime+&q ......
DateTime startTime=DateTime(em_1.Text)
DateTime endTime=DateTime(em_2.Text)
string sql
sql = dw_1.GetSQLSelect()+"Where (StartTime> '"+startTime+"') and (EndTime ......
ÔÚÏȰ²×°ÁËvs.net 2008 ºóÔõô°²×° Sql server 2005¡£ËÑÁ˺ܶàÎÄÕ£¬¿ÉÊÇ»¹ÊÇûÓп´µ½Ôõô²ÅÄܹ»°²×°ÉÏ¡£
×ÜÊÇÔÚ°²×°sql serverµÄ¿Í»§¶Ë£¨management studio£©Ê±ºò±¨´í£¬×°ÄǸöÊý¾Ý¿â server ÒýÇæµÄʱºòûÓÐÎ ......