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

mysqlÇ󯽾ùÖµµÄÎÊÌ⣬¼±£¡

²ÉÓÃPHP+MYSQL
±í company
userid  name  status
1        Ìì²Å    1
2        Ó¢ÐÛ    1
3        ¹í²Å    0

±í dp
gid  userid  sort1  sort2
1      1        4      3
2      2        2      3
3      2        2      1
4      2        3      2
5      2        3      2

Áгö  status=1 µÄÇé¿öϱícompanyÖеÄÊý¾Ý²¢¼ÆËã±ídpÖÐuseridÖµÏàͬµÄsort1ºÍsort2µÄƽ¾ùÖµ
name  avgsort1  avgsort2
Ìì²Å    4          3
Ó¢ÐÛ    2.5        2

Çë½Ì¸ßÊÖÓÃSQLÓï¾äÔõÑùʵÏÖ°¡£¿£¿£¿
SQL code:

--²âÊÔÊý¾Ý
if Object_id('company') is not null
drop table company
create table company(
id bigint not null,
[name] varchar(50) not null,
state int not null
)
insert into company
select '1','Ìì²Å','1'
union all
select '2','Ó¢ÐÛ','1'
union all
select '3','¹í²Å','0'

if Object_id('dp') is not null
dro


Ïà¹ØÎÊ´ð£º

mysqlÈçºÎʵÏÖ¸ßЧµÄËÑË÷£¿

Ò»¸öÐÐÒµÍøÕ¾£¬ÒªÊµÏֵŦÄÜÒªÇóΪ£º

Ò»ËÑË÷±íµ¥¿ÉÑ¡ËÑË÷ ²úÆ·/×ÊѶ/É̼ң¬ËÑË÷ʱϣÍûÏÈËѱêÌâºóÈ«ÎÄ£¬µ±Ç°µÄÊý¾ÝÁ¿¹À¼Æ3Íò¶à£¬¶¨Î»ÆÚÍûÔÚ°ÙÍò¼¶Ò²¿ÉÓá£

Êý¾ÝÀàÐÍΪinnodb£¬µ±Ç°µÄ·½·¨ÊǶԹؼü´Ê½øÐÐ ......

mysqlµÄÇý¶¯³ÌÐò

ÎÒÓÐÒ»¸öjava»·¾³ÏµijÌÐò£¬ÔÚ±¾»úÔËÐÐÕý³££¬µ«·¢²¼µ½ÍøµÄÐéÄâÖ÷»úʱ²»ÄÜÁ¬½ÓÊý¾Ý¿âÁ¬½Ó³Ø
jdk 1.6 tomcat6.0.18 mysql5 mysqljdbc5.1.5
ÐéÄâÖ÷»úµÄ¼¼ÊõÈËԱ˵£¬Ö»ÄÜÅäÖþÖÓòµÄÊý¾Ý¿âÁ¬½Ó³Ø£¬Ò²¾ÍÊÇÔÚM ......

MYSQL°²×°Ê§°Ü

ÎÒÒÔǰ°²×°ÁËÒ»´Î£¬ºóÀ´Ð¶ÔØÁË£¬ÏÖÔÚÔÙ°²×°µÄʱºò£¬Ìáʾ´íÎó£ºError 1305.Error reading from file C:DOCUME~1\LOCALS~1\Temp\mysql_server.msi.Verify that the file exists and that you can access it.
¿ÉÊÇÎÒÕÒ ......

MYSQLÓëSmartyµÄÓ¦ÓÃ

ÔÚÈýÊ®½²Óöµ½ÕâÑùÒ»¸öÎÊÌâ¾ÍÊÇÔËÐдúÂëʱ³öÏÖ´íÎó Fatal error: Call to undefined method mysql::fetch_array() in D:\WWW\news\index.php on line 12
£¬ÎÒ°Ñmysql::fetch_array() ¸Ä³Émysql::fetch_row() ÓÖ³öÏÖF ......

ÓйØmysqlµÄÎÊÌ⣡ - Java / Web ¿ª·¢

ÎÒµÄmysqlÔõôûÓа취дÈëÖÐÎÄÊý¾Ý£¿Ö»ÒªÊÇÊý¾ÝдÈëÊý¾Ý¿âʱ ¾Í»á±ä³ÉÈý¸öÎʺŠ£¿Çë½Ì¸ßÈË£¡£¡
linux? ÔõôдÈëµÄ

ÔÚmysqlÖÐÖ´ÐÐ show variables like 'character%'Ìù½á¹û³öÀ´¡£

ÔÚ°²×°MYSLQʱ½«Êý¾Ý¿âµÄ×Ö· ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ