DBA³£ÓÃsql(¶þ)
session״̬£º
STATUS VARCHAR2(8) Status of the session:
ACTIVE - Session currently executing SQL
INACTIVE - sql¼°ÆäsessionûÓÐÊÍ·Å»òÕý³£Í˳ö......
KILLED - Session marked to be killed
CACHED - Session temporarily cached for use by Oracle*XA
SNIPED - Session inactive, waiting on the client
²éѯÊý¾Ý¿âÖгÖËøºÍµÈ´ýËøµÄÓû§ÐÅÏ¢
select distinct o.object_name, sh.sid "SID", sh.SERIAL# "SERIAL", sh.username||'('||sh.sid||','||sh.SERIAL#||')' "Holder",
sw.username||'('||sw.sid||','||sw.SERIAL#||')' "Waiter",
decode(lh.lmode, 1, 'null', 2,
'row share', 3, 'row exclusive', 4, 'share',
5, 'share row exclusive' , 6, 'exclusive') "Lock Type"
from v$session sw, v$lock lw,all_objects o, v$session sh, v$lock lh
where lh.id1 = o.object_id
and lh.id1 = lw.id1
and sh.sid = lh.sid
and sw.sid = lw.sid
and sh.lockwait is null
and sw.lockwait is not null
and lh.type = 'TM'
and lw.type = 'TM';
select /*+ NO_MERGE(a) NO_MERGE(b) NO_MERGE(c) */ 'Wait' "Status", a.username, a.machine, a.sid, a.serial#, a.last_call_et "Seconds", b.id1, c.sql_text "SQL"
from v$session a, v$lock b, v$sqltext c
where a.username is not null
and a.lockwait = b.kaddr
and c.hash_value =a.sql_hash_value
union
select /*+ NO_MERGE(a) NO_MERGE(b) NO_MERGE(c) */ 'Lock' "Status", a.username, a.machine, a.sid, a.serial#, a.last_call_et "Seconds", b.id1, c.sql_text "SQL"
from v$session a, v$lock b, v$sqltext c
where b.id1 in
(select /*+ NO_MERGE(d) NO_MERGE(e) */ distinct e.id1
from v$session d, v$lock e
where d.lockwait = e.kaddr)
and a.username is not null
and a.sid = b.sid
and b.request=0
and c.ha
Ïà¹ØÎĵµ£º
ms sql ¸üбíAÖÐijÁÐΪ±íBÖеÄÖµ
select *
from dbo.NT_areapin
go
select *
from dbo.NT_dict_area
update NT_areapin
set AllNamePin='PengShui'
from NT_areapin
where AreaId='486'
go
update NT_dict_area
set BriefNamePin = NT_areapin.BriefNamePin,AllNamePin = NT_areapin.AllNamePin
from N ......
sqlÔÚ¶à·½ÃþË÷ºÍÅóÓѵİïÖúÏ£¬ÖÕÓÚ¿ÉÒÔÁ¬½Ó³É¹¦£¬Õâ¶ÔÎÒÀ´ËµÊǸöÀï³Ì±®À´µÄ£¬ÔÚ¹¤×÷µÄ¹ý³ÌÖÐÎÒ×ÜÊÇûÓлú»á¿ÉÒÔÅö´¥µ½SQL£¬µ±ÎÒ¹ÄÆðÓÂÆøÓÂÆøÏëѧϰµÄʱºòÎÒÁ¬ÔõôÓö¼²»»á£¬½øÀ´ÖÕÓÚÁ´½Ó³É¹¦£¬¿ªÐĵغÍÅóÓÑ·ÖÏíÎҵijɹû¡£
1.°²×°sql£¬Ñ§Ï°SQl£¬ÒòΪһ°ãÎÒÊÇÏëÒªÓÃÓÚVS2005ÏîÄ¿µÄ£¬ËùÒÔÒ»°ã×îºó¾ÍÏȰ²×°VSÈí¼þ£¬ÒÔ±ã ......
IIS Web·þÎñÆ÷°²È«¼Ó¹Ì²½Ö裺
²½Öè¡¡°²×°ºÍÅäÖà Windows Server 2003¡£
×¢Ò⣺
1.½«\System32\cmd.exe×ªÒÆµ½ÆäËûĿ¼»ò¸üÃû£»
2.ϵͳÕʺž¡Á¿ÉÙ£¬¸ü¸ÄĬÈÏÕÊ»§Ãû£¨ÈçAdministrator£©ºÍÃèÊö£¬ÃÜÂ뾡Á¿¸´ÔÓ£»
3.¾Ü¾øÍ¨¹ýÍøÂç·ÃÎʸüÆËã»ú£¨ÄäÃûµÇ¼£»ÄÚÖùÜÀíÔ±ÕÊ»§£»Support_388945a0£»Guest£»ËùÓзDzÙ×÷ϵͳ·þ ......
·½·¨Ò»£º
select distinct name from tablename
·½·¨¶þ£º
select min(fid),name,sex from tablename group by name
×ܼƣº
select distinct name from tablename ´ò¿ªÖظ´¼Ç¼µÄµ¥¸ö×Ö¶Î
select * from tablename where fid in(Select min(fid) from tablename group by name)´ò¿ªÖظ´¼Ç¼µÄËùÓÐ×Ö¶ÎÖµ
select ......
--»ù´¡Á˽⣺
1) select distinct name from table --´ò¿ªÖظ´¼Ç¼µÄµ¥¸ö×Ö¶Î
2) select * from table where fid in(Select min(fid) from table group by name)--´ò¿ªÖظ´¼Ç¼µÄËùÓÐ×Ö¶ÎÖµ
3) select * from table where name in(select name from table group by name having count(name)=1)--´ò¿ªÖظ´ÈÎÒâ´ÎÊýµ ......