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

SQL Server Linked Server ·ÃÎÊÔ¶³ÌÊý¾Ý¿â

ÔÚʹÓÃSQL ServerÊý¾Ý¿âʱ, Èç¹ûÐèÒª·ÃÎÊÔ¶³ÌµÄÁíÍâÒ»¸öÊý¾Ý¿â, ÄÇô¿ÉÒÔʹÓÃLinked ServerÀ´ÊµÏÖÕâ¸ö¹¦ÄÜ, ºÜ·½±ã. ±¾ÎÄ×ܽáÁË×Ô¼ºÔÚʹÓÃLinked Server¹¦ÄÜʱÓöµ½µÄ¼¸¸öÎÊÌâ, Èç¹ûÉÔ²»×¢Òâ,ºÜ¿ÉÄܳöÏÖ¸÷ÖÖ´íÎó.
1)´´½¨ÁËÒ»¸öеÄLinked Serverºó, ÐèÒªÊ×ÏÈÉèÖÃlogin ÕË»§, ÓÒ¼ü->ÊôÐÔ->Security, Èçͼ


Ïà¹ØÎĵµ£º

Sqlº¯Êý´óÈ«

--¾ÛºÏº¯Êý
use pubs
go
select avg(distinct price)  --ËãÆ½¾ùÊý
from titles
where type='business'
go
use pubs
go
select max(ytd_sales)  --×î´óÊý
from titles
go
use pubs
go
select min(ytd_sales) --×îСÊý
from titles
go
use pubs
go
select type,sum(price),sum(advance)  ......

SQL Server 2000£«ADO.NETʵÏÖ²¢·¢¿ØÖÆ ×ªÔØ

³£¼û²¢·¢²¢·¢Ò»ÖÂÐÔÎÊÌâ°üÀ¨£º¶ªÊ§µÄÐ޸ġ¢²»¿ÉÖØ¸´¶Á¡¢¶ÁÔàÊý¾Ý¡¢»ÃÓ°¶Á£¨»ÃÓ°¶ÁÔÚһЩ×ÊÁÏÖÐÍùÍùÓë²»¿ÉÖØ¸´¶Á¹éΪһÀࣩ¡£
2.2.1.1 ¶ªÊ§ÐÞ¸Ä
ÏÂÃæÎÒÃÇÏÈÀ´¿´Ò»¸öÀý×Ó£¬ËµÃ÷²¢·¢²Ù×÷´øÀ´µÄÊý¾ÝµÄ²»Ò»ÖÂÐÔÎÊÌâ¡£
¿¼ÂÇ·É»ú¶©Æ±ÏµÍ³ÖеÄÒ»¸ö»î¶¯ÐòÁÐ:
¼×ÊÛÆ±µã£¨¼×ÊÂÎñ£©¶Á³öijº½°àµÄ»úƱÓà¶îA,ÉèA=16.
ÒÒÊÛÆ±µã£¨ÒÒÊÂÎñ ......

oracle SQLÐÔÄÜÓÅ»¯

ÎÒÃÇÒª×öµ½²»µ«»áдSQL,»¹Òª×öµ½Ð´³öÐÔÄÜÓÅÁ¼µÄSQL,ÒÔÏÂΪ±ÊÕßѧϰ¡¢ÕªÂ¼¡¢²¢»ã×ܲ¿·Ö×ÊÁÏÓë´ó¼Ò·ÖÏí£¡
£¨1£©      Ñ¡Ôñ×îÓÐЧÂʵıíÃû˳Ðò(Ö»ÔÚ»ùÓÚ¹æÔòµÄÓÅ»¯Æ÷ÖÐÓÐЧ)£º
ORACLEµÄ½âÎöÆ÷°´ÕÕ´ÓÓÒµ½×óµÄ˳Ðò´¦Àífrom×Ó¾äÖеıíÃû£¬from×Ó¾äÖÐдÔÚ×îºóµÄ±í(»ù´¡±í driving table)½«±»×îÏÈ´¦Àí£ ......

ʹÓÃHibernate+MySql+native SQLµÄBUG,ÒÔ¼°½â¾ö°ì·¨

±¾À´ÊÇmssql+hibernate+native SQL Ó¦ÓõĺܺÍг
µ«Êǵ½Á˰Ñmssql»»³Émysql£¬¾Í³öÁË´í(ͬÑùµÄÊý¾Ý½á¹¹ºÍÊý¾Ý)¡£
²éѯ·½·¨ÊÇ£º
String sql =
"select id XXX_ID from t_tab";
List<Map> list = session.createSQLQuery(sql)
.setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP)
.list();
´í ......

ÈçºÎ¼ì²éSQL Server×èÈû

--²éѯӦÓóÌÐòµÄµÈ´ý
SELECT TOP 10
wait_type,waiting_tasks_count AS tasks,
wait_time_ms,max_wait_time_ms AS max_wait,
signal_wait_time_ms AS signal
from sys.dm_os_wait_stats
ORDER BY wait_time_ms DESC
--²éѯÔÚÈÎһʱ¿ÌËùÓÐÊÚȨ¸øµ±Ç°Ö´ÐÐÊÂÎñ»òµ±Ç°Ö´ÐÐÊÂÎñµÈ´ýµÄËø
SELECT
request_session_id A ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ