Sql2005/08 ±í½á¹¹ SQL Óï¾ä
SELECT
(case when a.colorder=1 then d.name
--+'('+cast(h.value as nvarchar)+')'
else '' end)±íÃû,
a.colorder ×Ö¶ÎÐòºÅ,
a.name ×Ö¶ÎÃû,
isnull(g.[value],'') AS ×Ö¶Î˵Ã÷,
(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '¡Ì'else '' end) ±êʶ,
(case when (SELECT count(*)
from sysobjects
WHERE (name in
(SELECT name
from sysindexes
WHERE (id = a.id) AND (indid in
(SELECT indid
from sysindexkeys
WHERE (id = a.id) AND (colid in
(SELECT colid
from syscolumns
WHERE (id = a.id) AND (name = a.name))))))) AND
(xtype = 'PK'))>0 then '¡Ì' else '' end) Ö÷¼ü,
b.name ÀàÐÍ,
a.length Õ¼ÓÃ×Ö½ÚÊý,
COLUMNPROPERTY(a.id,a.name,'PRECISION') as ³¤¶È,
--isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as СÊýλÊý,
(case when a.isnullable=1 then '¡Ì'else '' end) ÔÊÐí¿Õ,
isnull(e.text,'') ĬÈÏÖµ
from syscolumns a left join systypes b
on a.xtype=b.xusertype
inner join sysobjects d
on a.id=d.id and d.xtype='U' and d.name'sysdiagrams'
left join syscomments e
on a.cdefault=e.id
left join sys.extended_properties g
on a.id=g.major_id AND a.colid = g.minor_id
left join sys.extended_properties h
on a.id=h.major_id AND h.minor_id =0
order by a.id,a.colorder
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backup log dbname with NO_LOG
backup log dbname with TRUNCATE_ONLY
DBCC SHRINKDATABASE(dbname)
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µ½Êý¾Ý¿âÎļþµÄ´æ·ÅĿ¼£¬½«dbname_log.LDFÎļþɾ³ý£¬ÅÂSµÄ»° ......
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EXIT£ºÖÕÖ¹SQL*PLUS£¬²¢½«¿ØÖÆÈ¨½»»¹¸øOS¡£
2¡¢±à¼ÃüÁî
1) List»òL£ºÏÔʾ»º³åÇøÖÐËùÓеÄÐС£
SQL> list
1 select
2 *
3* from dept --×¢£º*´ú±íµ±Ç°ÐС£ ......
1¡¢²éÕÒ±íÖжàÓàµÄÖØ¸´¼Ç¼£¬Öظ´¼Ç¼ÊǸù¾Ýµ¥¸ö×ֶΣ¨peopleId£©À´ÅжÏ
select * from people
where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1)
2¡¢É¾³ý±íÖжàÓàµÄÖØ¸´¼Ç¼£¬Öظ´¼Ç¼ÊǸù¾Ýµ¥¸ö× ......
SET TIMING ON | OFF
SQL> set timing on
SQL> select * from emp where empno = 7369;
EMPNO ENAME JOB MGR HIREDATE SAL COMM
---------- ---------- --------- ---------- ----------- ---------- ----------
DEPTNO
----------
7369 SMITH CLERK ......