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

OracleÊý¾Ý¿âÓαêʹÓôóÈ«

SQLÊÇÓÃÓÚ·ÃÎÊORACLEÊý¾Ý¿âµÄÓïÑÔ£¬PL/SQLÀ©Õ¹ºÍ¼ÓÇ¿ÁËSQLµÄ¹¦ÄÜ£¬Ëü ͬʱÒýÈëÁ˸üÇ¿µÄ³ÌÐòÂß¼­¡£ PL/SQLÖ§³ÖDMLÃüÁîºÍSQLµÄÊÂÎñ¿ØÖÆÓï¾ä¡£DDLÔÚPL/SQLÖв»±»Ö§³Ö£¬Õâ¾ÍÒâζ×÷ÔÚPL/SQL³ÌÐò¿éÖв»ÄÜ´´½¨±í»òÆäËûÈκζÔÏ󡣽Ϻà µÄPL/SQL³ÌÐòÉè¼ÆÊÇÔÚPL/SQL¿éÖÐʹÓÃÏóDBMS_SQLÕâÑùµÄÄÚ½¨°ü»òÖ´ÐÐEXECUTE IMMEDIATEÃüÁÁ¢¶¯Ì¬SQLÀ´Ö´ÐÐDDLÃüÁPL/SQL±àÒëÆ÷±£Ö¤¶ÔÏóÒýÓÃÒÔ¼°Óû§µÄȨÏÞ¡£
¡¡¡¡ÏÂÃæÎÒÃǽ«ÌÖÂÛ¸÷ÖÖÓÃÓÚ·ÃÎÊORACLEÊý¾Ý¿âµÄDDLºÍTCLÓï¾ä¡£
¡¡¡¡²éѯ
¡¡¡¡SELECTÓï¾äÓÃÓÚ´ÓÊý¾Ý¿âÖвéѯÊý¾Ý£¬µ±ÔÚPL/SQLÖÐʹÓÃSELECTÓï¾äʱ£¬ÒªÓëINTO×Ó¾äÒ»ÆðʹÓ㬲éѯµÄ·µ»ØÖµ±»¸³ÓèINTO×Ó¾äÖеıäÁ¿£¬±äÁ¿µÄÉùÃ÷ÊÇÔÚDELCAREÖС£SELECT INTOÓï·¨ÈçÏ£º
SELECT [DISTICT|ALL]{*|column[,column,...]}
INTO (variable[,variable,...] |record)
from {table|(sub-query)}[alias]
WHERE............
¡¡¡¡PL/SQLÖÐSELECTÓï¾äÖ»·µ»ØÒ»ÐÐÊý¾Ý¡£Èç¹û³¬¹ýÒ»ÐÐÊý¾Ý£¬ÄÇô¾ÍҪʹÓÃÏÔʽÓα꣨¶ÔÓαêµÄÌÖÂÛÎÒÃǽ«ÔÚºóÃæ½øÐУ©£¬INTO×Ó¾äÖÐÒªÓÐÓëSELECT×Ó¾äÖÐÏàͬÁÐÊýÁ¿µÄ±äÁ¿¡£INTO×Ó¾äÖÐÒ²¿ÉÒÔÊǼǼ±äÁ¿¡£
¡¡¡¡%TYPEÊôÐÔ
¡¡¡¡ÔÚPL/SQLÖпÉÒÔ½«±äÁ¿ºÍ³£Á¿ÉùÃ÷ΪÄÚ½¨»òÓû§¶¨ÒåµÄÊý¾ÝÀàÐÍ£¬ÒÔÒýÓÃÒ»¸öÁÐÃû£¬Í¬Ê±¼Ì³ÐËûµÄÊý¾ÝÀàÐͺʹóС¡£ÕâÖÖ¶¯Ì¬¸³Öµ·½·¨ÊǷdz£ÓÐÓõ쬱ÈÈç±äÁ¿ÒýÓõÄÁеÄÊý¾ÝÀàÐͺʹóС¸Ä±äÁË£¬Èç¹ûʹÓÃÁË%TYPE,ÄÇôÓû§¾Í²»±ØÐ޸ĴúÂ룬·ñÔò¾Í±ØÐëÐ޸ĴúÂë¡£
¡¡Àý£º
v_empno SCOTT.EMP.EMPNO%TYPE;
v_salary EMP.SALARY%TYPE; 
¡¡¡¡²»µ«ÁÐÃû¿ÉÒÔʹÓÃ%TYPE,¶øÇÒ±äÁ¿¡¢Óαꡢ¼Ç¼£¬»òÉùÃ÷µÄ³£Á¿¶¼¿ÉÒÔʹÓÃ%TYPE¡£Õâ¶ÔÓÚ¶¨ÒåÏàͬÊý¾ÝÀàÐ͵ıäÁ¿·Ç³£ÓÐÓá£
DELCARE
V_A NUMBER(5):=10;
V_B V_A%TYPE:=15;
V_C V_A%TYPE;
BEGIN
DBMS_OUTPUT.PUT_LINE
('V_A='||V_A||'V_B='||V_B||'V_C='||V_C);
END
SQL>/
V_A=10 V_B=15 V_C=
PL/SQL procedure successfully completed.
SQL>
¡¡¡¡ÆäËûDMLÓï¾ä
¡¡ ¡¡ÆäËü²Ù×÷Êý¾ÝµÄDMLÓï¾äÊÇ:INSERT¡¢UPDATE¡¢DELETEºÍLOCK TABLE,ÕâЩÓï¾äÔÚPL/SQLÖеÄÓï·¨ÓëÔÚSQLÖеÄÓï·¨Ïàͬ¡£ÎÒÃÇÔÚÇ°ÃæÒѾ­ÌÖÂÛ¹ýDMLÓï¾äµÄʹÓÃÕâÀï¾Í²»ÔÙÖØ¸´ÁË¡£ÔÚDMLÓï¾äÖпÉÒÔʹÓÃÈÎ ºÎÔÚDECLARE²¿·ÖÉùÃ÷µÄ±äÁ¿£¬Èç¹ûÊÇǶÌ׿飬ÄÇôҪעÒâ±äÁ¿µÄ×÷Ó÷¶Î§¡£
¡¡¡¡Àý£º
CREATE OR REPLACE PROCEDURE FIRE_EMPLOYEE (pempno in number)
¡¡AS
¡¡¡¡v_ename EMP.ENAME%TYPE;
¡¡BEGIN
¡¡¡¡SELECT ename INTO v


Ïà¹ØÎĵµ£º

¡¾×ª¡¿ÈçºÎ²é¿´oracle sqlÖ´Ðмƻ®

·½·¨Ò»
µÚÒ»²½£ºµÇÈësql/plus Ö´ÐÐÃüÁÎÞÏȺó˳Ðò£©
set   time   on; (˵Ã÷£º´ò¿ªÊ±¼äÏÔʾ£©  
  set   autotrace   on; (˵Ã÷£º´ò¿ª×Ô¶¯·ÖÎöͳ¼Æ£¬²¢ÏÔʾSQLÓï¾äµÄÔËÐнá¹û£©  
  set   autotrace   traceonly; (˵à ......

Jsp Á¬½Ó mySQL¡¢Oracle Êý¾Ý¿â±¸Íü

Jsp Á¬½Ó mySQL¡¢Oracle Êý¾Ý¿â±¸Íü
2009-12-15 16:47
Jsp »·¾³Ä¿Ç°×îÁ÷ÐеÄÊÇ Tomcat5.0¡£Tomcat5.0 ×Ô¼º°üº¬Ò»¸ö Web ·þÎñÆ÷£¬Èç¹ûÊDzâÊÔ£¬¾Íû±ØÒª°Ñ Tomcat Óë IIS »ò Apache ¼¯³ÉÆðÀ´¡£ÔÚ Tomcat ×Ô´øµÄ Web ·þÎñÆ÷Ï¿ÉÒÔ½øÐÐ Jsp ²âÊÔ¡£
    °²×° Tomcat5.0 ǰÐèÒª°²×° JDK(Èç¹ûÊÇ Windows server ......

Oracleɾ³ýÖØ¸´¼Ç¼

Oracleɾ³ýÖØ¸´¼Ç¼µÄ×îºÃµÄ·½·¨£º
DELETE from EMP E WHERE E.ROWID > (SELECT MIN(y.ROWID)
from EMP y
WHERE y.EMPNO = E.EMPNO )
1¡¢×Ó²éѯÕÒ³öijԱ¹¤×îµÍµÄROWID£¨¿Ï¶¨Ö»ÓÐÒ»¸ö£©£¬ÆäËü´óÓÚÕâÌõ¼Ç¼ROWIDµÄ£¬È«²¿É¾³ý¡£
2¡¢OracleÖÐʹÓÃROWIDɾ³ýÖØ¸´¼Ç¼×î¿ì,ÒòΪRowid¶ÔÓ¦ÕâÌõ¼Ç¼ÔÚ´ÅÅÌÉϵÄλÖÃ
ÃæÊÔ£º ......

¼Ó¿ìOracleµÄ»Ø¹öËÙ¶È

ÎÊÌâÃèÊö
1¡¢Ó¦ÓÃÁ¬½ÓÊý¾ÝÒì³£»ºÂý£¬°üÀ¨¿Í»§¶ËʹÓÃplsqlÁ¬½Ó£»
2¡¢Êý¾Ý¿âÖ÷»úcpuÕ¼ÓÃÂʾӸ߲»Ï£¬IOдÈë¾Ó¸ß²»Ï¡£
3¡¢Ö÷»úÈÕ³£Î¬»¤²Ù×÷ÏìÓ¦Âý£¬Èçman»òw£»
·ÖÎöÎÊÌâ
ØÏµÍ³¼°oracleÓ¦ÓÃΪʲôÏìÓ¦Âý
1¡¢ÎªÊ²Ã´ÏµÍ³Á¬wÕâô¼òµ¥µÄ²Ù×÷¶¼»á¾õµÃ¿¨ÄØ£¿
2¡¢ÎªÊ²Ã´Ã»ÓÐÈκÎÓ¦ÓýÓÈëµÄÇé¿öÏ£¬Êý¾Ý¿â»áÓдóÁ¿µÄдÈë ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ