SQLServerºÍOracleµÄ³£Óú¯Êý¶Ô±È
1.¾ø¶ÔÖµ
S:select abs(-1) value
O:select abs(-1) value from dual
2.È¡Õû(´ó)
S:select ceiling(-1.001) value
O:select ceil(-1.001) value from dual
3.È¡Õû£¨Ð¡£©
S:select floor(-1.001) value
O:select floor(-1.001) value from dual
4.È¡Õû£¨½ØÈ¡£©
S:select cast(-1.002 as int) value
O:select trunc(-1.002) value from dual
5.ËÄÉáÎåÈë
S:select round(1.23456,4) value 1.23460
O:select round(1.23456,4) value from dual 1.2346
6.eΪµ×µÄÃÝ
S:select Exp(1) value 2.7182818284590451
O:select Exp(1) value from dual 2.71828182
7.È¡eΪµ×µÄ¶ÔÊý
S:select log(2.7182818284590451) value 1
O:select ln(2.7182818284590451) value from dual; 1
8.È¡10Ϊµ×¶ÔÊý
S:select log10(10) value 1
O:select log(10,10) value from dual; 1
9.ȡƽ·½
S:select SQUARE(4) value 16
O:select power(4,2) value from dual 16
10.ȡƽ·½¸ù
S:select SQRT(4) value 2
O:select SQRT(4) value from dual 2
11.ÇóÈÎÒâÊýΪµ×µÄÃÝ
S:select power(3,4) value 81
O:select power(3,4) value from dual 81
12.È¡Ëæ»úÊý
S:select rand() value
O:select sys.dbms_random.value(0,1) value from dual;
13.È¡·ûºÅ
S:select sign(-8) value -1
O:select sign(-8) value from dual -1
----------Êýѧº¯Êý
14.Ô²ÖÜÂÊ
S:SELECT PI() value 3.1415926535897931
O:²»ÖªµÀ
15.sin,cos,tan ²ÎÊý¶¼ÒÔ»¡¶ÈΪµ¥Î»
ÀýÈ磺select sin(PI()/2) value µÃµ½1£¨SQLServer£©
16.Asin,Acos,Atan,Atan2 ·µ»Ø»¡¶È
17.»¡¶È½Ç¶È»¥»»(SQLServer£¬Oracle²»ÖªµÀ)
DEGREES£º»¡¶È-¡µ½Ç¶È
RADIANS£º½Ç¶È-¡µ»¡¶È
---------ÊýÖµ¼ä±È½Ï
18. Ç󼯺Ï×î´óÖµ
S:select max(value) value from
(select 1 value
union
select -2 value
union
select 4 value
union
select 3 value)a
O:select greatest(1,-2,4,3) value from dual
19. Ç󼯺Ï×îСֵ
S:select min(value) value from
(select 1 value
union
select -2 value
union
select 4 value
union
select 3 value)a
O:select least(1,-2,4,3) value from dual
20.ÈçºÎ´¦ÀínullÖµ(F2ÖеÄnullÒÔ10´úÌæ)
S:select F1,IsNull(F2,10) value from Tbl
O:select F1,nvl(F2,10) value from Tbl
--------ÊýÖµ¼ä±È½Ï-----------------
Ïà¹ØÎĵµ£º
Ê×ÏȲéÕÒÄ¿±êÓû§µÄµ±Ç°½ø³Ì£º
select sid,serial# from v$session where username='ERP';
²éѯ½á¹û£º
sid serial#
222 123
122 233
Ç¿ÐжϿªÓû§Á¬½Ó£º
alter system kill session 'sid,serial';
ÀýÈ磺
alter system kill session '222,123';
......
ÖйúµçÁ¦ÐÐҵĿǰÕýÔÚ¾Àúמ޴óµÄ±ä»¯£º´Ó¹ú¼Ò°ìµçµ½ÆóÒµ°ìµç£¬ÐγÉÁ˶à¼Ò¾ºÕù°ìµçµÄ¸ñ¾Ö£»³§Íø·Ö¿ª¡¢¾º¼ÛÉÏÍø£¬´Ó¼Æ»®µ½Êг¡×ª¹ì£¬ÒýÈë¶àÖÖ¾¼Ã³É·Ö£»´ÓµØÓòÐÔ·ÖÉ¢¹©µçÏò´óµçÍø·¢Õ¹£»´ÓÕþÆó²»·Öµ½ÕþÆó·Ö¿ª¡£ÕâЩ±ä»¯£¬Ê¹ÖйúµÄµçÁ¦ÐÐÒµ¾ÊÜ×ÅǰËùδÓеÄѹÁ¦¡£
Ò»·½Ã棬2003Äê¹úÄڵķ¢µçÆóÒµÖØÐ¸Ä×é£ ......
ÔÎijö´¦£ºhttp://www.cnblogs.com/luoht/archive/2010/03/01/1676049.html
ÓÃINд³öÀ´µÄSQLµÄÓŵãÊDZȽÏÈÝÒ×д¼°ÇåÎúÒ×¶®£¬Õâ±È½ÏÊʺÏÏÖ´úÈí¼þ¿ª·¢µÄ·ç¸ñ¡£
¡¡¡¡µ«ÊÇÓÃINµÄSQLÐÔÄÜ×ÜÊDZȽϵ͵쬴ÓSQLÖ´ÐеIJ½ÖèÀ´·ÖÎöÓÃINµÄSQLÓë²»ÓÃINµÄSQLÓÐÒÔÏÂÇø±ð£º
¡¡¡¡SQLÊÔͼ½«Æäת»»³É¶à¸ö±íµÄÁ¬½Ó£¬Èç¹ûת»»²»³É¹¦ÔòÏÈÖ´ÐÐ ......
1.¾ø¶ÔÖµ
S:select abs(-1) value
O:select abs(-1) value from dual
2.È¡Õû(´ó)
S:select ceiling(-1.001) value
O:select ceil(-1.001) value from dual
3.È¡Õû£¨Ð¡£©
S:select floor(-1.001) value
O:select floor(-1.001) value from dual
4.È ......