1> 閫氳繃姝よ鍙ユ煡璇㈡鍦ㄩ攣瀹氱殑SESSION_ID:
1
SELECT SESSION_ID FROM V$LOCKED_OBJECT,USER_OBJECTS WHERE V$LOCKED_OBJECT.OBJECT_ID = USER_OBJECTS.OBJECT_ID
SELECT SESSION_ID FROM V$LOCKED_OBJECT,USER_OBJECTS WHERE V$LOCKED_OBJECT.OBJECT_ID = USER_OBJECTS.OBJECT_ID
2> 閫氳繃絎竴姝ユ煡璇㈠埌鐨凷ESSION_ID鏌ヨSERIAL#
1SELECT SERIAL# FROM V$SESSION WHERE SID='12'(姝ゅ'12'涓轟笂闈㈡煡璇㈠埌鐨?/span>'SESSION_ID')
SELECT SERIAL# FROM V$SESSION WHERE SID='12'(姝ゅ'12'涓轟笂闈㈡煡璇㈠埌鐨?/span>'SESSION_ID')
3> 鏍規(guī)嵁1,2姝ユ煡璇㈠埌鐨凷ESSION_ID鍜孲ERIAL#鎵ц
1ALTER SYSTEM KILL SESSION '12,154'(12涓篠ESSION_ID鐨勫? 154涓篠ERIAL#鐨勫?
ALTER SYSTEM KILL SESSION '12,154'(12涓篠ESSION_ID鐨勫? 154涓篠ERIAL#鐨勫?4> 濡傛灉鍒╃敤涓婇潰鐨勫懡浠ゆ潃姝諱竴涓繘紼嬪悗錛岃繘紼嬬姸鎬佽緗負(fù)"killed"錛屼絾鏄攣瀹氱殑璧勬簮寰堥暱鏃墮棿娌℃湁琚噴鏀撅紝閭ｄ箞榪樺彲浠ュ湪os涓綰у啀鏉姝葷浉搴旂殑榪涚▼(綰跨▼)錛岄鍏堟墽琛屼笅闈㈢殑璇彞鑾峰緱褰撳墠榪涚▼(綰跨▼)鐨勬爣紺篜ID錛?br />
1select spid, osuser, s.program
2from v$session s,v$process p
3where s.paddr=p.addr and s.sid=12 (12鏄笂闈㈢殑SESSION_ID)
select spid, osuser, s.program 2
from v$session s,v$process p3
where s.paddr=p.addr and s.sid=12 (12鏄笂闈㈢殑SESSION_ID)鐒跺悗鍦∣S閫氳繃浠誨姟綆＄悊鍣ㄦ壘鍒板搴旂殑榪涚▼錛屽湪鏉姝昏繖涓繘紼?綰跨▼)
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with rollup 銆?/span>with cube銆?/span>grouping CUBE 鍜?ROLLUP 涔嬮棿鐨勫尯鍒湪浜庯細(xì) CUBE 鐢熸垚鐨勭粨鏋滈泦鏄劇ず浜?jiǎn)鎵閫夊垪涓肩殑鎵鏈夌粍鍚堢殑鑱氬悎銆? ROLLUP 鐢熸垚鐨勭粨鏋滈泦鏄劇ず浜?jiǎn)鎵閫夊垪涓肩殑鏌愪竴灞傛緇撴瀯鐨勮仛鍚堛? grouping: 褰撶敤 CUBE 鎴?ROLLUP 榪愮畻絎︽坊鍔犺鏃訛紝闄勫姞鐨勫垪杈撳嚭鍊間負(fù)1錛屽綋鎵娣誨姞鐨勮涓嶆槸鐢?CUBE 鎴?ROLLUP 浜х敓鏃訛紝闄勫姞鍒楀間負(fù)0銆? --渚嬪 DECLARE @T TABLE(鍚嶇О VARCHAR(1) , 鍑虹増鍟?VARCHAR(10), 浠鋒牸1 INT, 浠鋒牸2 INT) INSERT @T SELECT 'a', '鍖椾含', 11, 22 UNION ALL SELECT 'a', '鍥涘窛', 22, 33 UNION ALL SELECT 'b', '鍥涘窛', 12, 23 UNION ALL SELECT 'b', '鍖椾含', 10, 20 UNION ALL SELECT 'b', '鏄嗘槑', 20, 30 SELECT 鍚嶇О, 鍑虹増鍟? SUM(浠鋒牸1) AS 浠鋒牸1, SUM(浠鋒牸2) AS 浠鋒牸2, GROUPING(鍚嶇О) AS CHECK鍚嶇О, GROUPING(鍑虹増鍟? AS CHECK鍑虹増鍟? FROM @T GROUP BY 鍚嶇О,鍑虹増鍟?WITH CUBE /* 鍚嶇О 鍑虹増鍟? 浠鋒牸1 浠鋒牸2 CHECK鍚嶇О CHECK鍑虹増鍟? ---- ---------- ----------- ----------- ------- -------- a 鍖椾含 11 22 0 0 a 鍥涘窛 22 33 0 0 a NULL 33 55 0 1 b 鍖椾含 10 20 0 0 b 鏄嗘槑 20 30 0 0 b 鍥涘窛 12 23 0 0 b NULL 42 73 0 1 NULL NULL 75 128 1 1 NULL 鍖椾含 21 42 1 0 NULL 鏄嗘槑 20 30 1 0 NULL 鍥涘窛 34 56 1 0 錛堟墍褰卞搷鐨勮鏁頒負(fù) 11 琛岋級(jí) */ --鍒嗘瀽 /*group by 涓ゅ垪錛氬悕縐版湁涓や釜綾誨埆A,B;鎵鏈夌敱CUBE榪愮畻鑰岀敓鎴愯鐨勬槸 鍚嶇О 鍑虹増鍟? 浠鋒牸1 浠鋒牸2 CHECK鍚嶇О CHECK鍑虹増鍟? ---- ---------- ----------- ----------- ------- -------- a NULL 33 55 0 1 b NULL 42 73 0 1 鍑虹増鍟嗘湁涓変釜綾誨埆錛屾墍鏈夌敱CUBE榪愮畻鑰岀敓鎴愯鐨勬槸 鍚嶇О 鍑虹増鍟? 浠鋒牸1 浠鋒牸2 CHECK鍚嶇О CHECK鍑虹増鍟? ---- ---------- ----------- ----------- ------- -------- NULL 鍖椾含 21 42 1 0 NULL 鏄嗘槑 20 30 1 0 NULL 鍥涘窛 34 56 1 0 浠ュ強(qiáng) NULL NULL 75 128 1 1 */ SELECT 鍚嶇О, 鍑虹増鍟? SUM(浠鋒牸1) AS 浠鋒牸1, SUM(浠鋒牸2) AS 浠鋒牸2 FROM @T GROUP BY 鍚嶇О,鍑虹増鍟?WITH ROLLUP /* 鍚嶇О 鍑虹増鍟? 浠鋒牸1 浠鋒牸2 ---- ---------- ----------- ----------- a 鍖椾含 11 22 a 鍥涘窛 22 33 a NULL 33 55 b 鍖椾含 10 20 b 鏄嗘槑 20 30 b 鍥涘窛 12 23 b NULL 42 73 NULL NULL 75 128 */
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/*
渚嬪瓙:
declare @i uniqueidentifier
select @i=newid()
begin
print cast(@i as varchar(50))
end
*/
2:Oracle涓紝鏈塖YS_GUID鍑芥暟錛岃繑鍥炴暟鎹被鍨嬩負(fù)char錛岄暱搴︿負(fù)32銆?br /> /*
select sys_guid() from dual
*/
DB2涓紝娌℃湁浜х敓GUID鐨勫嚱鏁幫紝鏈変竴鏇夸唬鐨勫嚱鏁癵enerate_unique錛岃繑鍥炵殑鏁版嵁綾誨瀷涓篊HAR FOR BIT錛岄暱搴︿負(fù)13銆?br />
SYBASE涓紝涔熸湁NEWID()鍑芥暟錛岃繑鍥炵殑鏁版嵁綾誨瀷涓篶har錛岄暱搴︿負(fù)36銆?br />
璇勮堪錛孏UID鍦ㄤ繚璇佹暟鎹褰昉rimary Key鍞竴鎬э紝浣滅敤寰堝ぇ錛孌B2涓嶆敮鎸佽繖涓鍑芥暟錛屽晢鐢ㄤ富嫻佹暟鎹簱涓紝DB2鏈宸侻S SQL Server榪樻湁鐩存帴鏀寔GUID鐨勬暟鎹被鍨嬶紝鏀寔鏈濂姐係YBASE鐨勬枃妗ｄ綔寰楁渶宸紝鍦ㄥ叾鏂囨。涓棤娉曟煡鍒癗EWID鍑芥暟錛屼絾鏄彲浠ヤ嬌鐢ㄣ?br />
杞嚦:http://www.cnblogs.com/jobs/archive/2004/07/26/27533.html
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2.濡傛灉榪欐椂鐧婚檰鐨勮瘽錛岃偗瀹氫細(xì)鎻愮ず浣犳病鏈夌洃鍚櫒錛岄偅鏄洃鍚殑鏈嶅姟娌℃湁寮錛屽埌璁＄畻鏈虹殑鏈嶅姟閭ｈ繘鍏ユ湇鍔＄殑鏂規(guī)硶錛氭帶鍒墮潰鏉?銆夌鐞嗗伐鍏?銆夋湇鍔★紙淇╀釜榻胯疆鐨勯偅涓浘鏍囷級(jí)錛岀劧鍚庢壘鍒癘racleOraHome92TNSListener榪欎釜鏈嶅姟錛屾妸瀹冨惎鍔ㄤ簡(jiǎn)錛屽氨濂戒簡(jiǎn)銆?/p>
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select top eachpage * from jobs where job_id not in ( select top (eachpage*(currentpage-1)) job_id from jobs order by job_id desc)) order by job_id desc;
explain:
1. eachpage : the number of each page show the recorder
2.currentpage: current page
notice:
the red line in the sentence,you should take care of it, because Microsoft SQLServer TOP Function can't support the expression .it can only support a number.
so before you prepare to buildup the sql sentence ,you should alread calculate the result of the expression about (eachpage*(currentpage-1)) .
Example:
set eachpage=3
currentpage=5
so (eachpage*(currentpage-1)) =12
select top 3 * from jobs where (job_id not in (select top 12 job_id from jobs order by job_id desc)) order by job_id desc
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