oracle %type
1¡¢Ê¹ÓÃ%TYPE
ÔÚÐí¶àÇé¿öÏ£¬PL/SQL±äÁ¿¿ÉÒÔÓÃÀ´´æ´¢ÔÚÊý¾Ý¿â±íÖеÄÊý¾Ý¡£ÔÚÕâÖÖÇé¿öÏ£¬±äÁ¿Ó¦¸ÃÓµÓÐÓë±íÁÐÏàͬµÄÀàÐÍ¡£ÀýÈ磬students±íµÄfirst_nameÁеÄÀàÐÍΪVARCHAR2(20),ÎÒÃÇ¿ÉÒÔ°´ÕÕÏÂÊö·½Ê½ÉùÃ÷Ò»¸ö±äÁ¿
DECLARE
v_FirstName VARCHAR2(20);
µ«ÊÇÈç¹ûfirst_nameÁеĶ¨Òå¸Ä±äÁ˻ᷢÉúʲô£¨±ÈÈç˵±í¸Ä±äÁË£¬first_nameÏÖÔÚµÄÀàÐͱäΪVARCHAR2(25)£©£¿ÄǾͻᵼÖÂËù ÓÐʹÓÃÕâ¸öÁеÄPL/SQL´úÂ붼±ØÐë½øÐÐÐ޸ġ£Èç¹ûÄãÓкܶàµÄPL/SQL´úÂ룬ÕâÖÖ´¦Àí¿ÉÄÜÊÇÊ®·ÖºÄʱºÍÈÝÒ׳ö´íµÄ¡£
Õâʱ£¬Äã¿ÉÒÔʹÓÔ%TYPE”ÊôÐÔ¶ø²»Êǽ«±äÁ¿ÀàÐÍÓ²ÐÔ±àÂë¡£
ÀýÈ磺
DECLARE
v_FirstName students.first_name%TYPE;
ͨ¹ýʹÓÃ%TYPE,v_FirstName±äÁ¿½«Í¬students±íµÄfirst_nameÁеÄÀàÐÍÏàͬ£¨¿ÉÒÔÀí½âΪ½«Á½Õ߰ÆðÀ´£©¡£
ÿ´ÎÄäÃû¿é»òÃüÃû¿éÔËÐиÃÓï¾ä¿éÒÔ¼°±àÒë´æ´¢¶ÔÏ󣨹ý³Ì¡¢º¯Êý¡¢°ü¡¢¶ÔÏóÀàºÍ´¥·¢Æ÷£©Ê±£¬¾Í»áÈ·¶¨¸ÃÀàÐÍ¡£
ʹÓÃ%TYPEÊǷdz£ºÃµÄ±à³Ì·ç¸ñ£¬ÒòΪËüʹµÃPL/SQL¸ü¼ÓÁé»î£¬¸ü¼ÓÊÊÓ¦ÓÚ¶ÔÊý¾Ý¿â¶¨ÒåµÄ¸üС£
ÀýÈ磺
declare
v_id hr.jobs.job_id%type;
v_title hr.jobs.job_title%type;
begin
select job_id,job_title into v_id,v_title
from hr.jobs
where job_id ='&aa';
dbms_output.put_line('ÐòºÅ'||v_id );
dbms_output.put_line('Ãû³Æ'||v_title);
end;
Ö´ÐУ¬ÎÒÃÇÊäÈëaa±äÁ¿µÄÖµ£ºAD_VP
Êä³ö½á¹ûΪ£º
ÐòºÅAD_VP
Ãû³ÆAdministration Vice President
2 ʹÓÃ%ROWTYPE (Ï൱ÓÚ¶¨ÒåÒ»¸östruct À´½øÐдæ·Å£¬ÒÔ¶ÔÏóÀ´¿´¶ÔÊý¾Ý£©
ÔÚPL/SQLÖн«Ò»¸ö¼Ç¼ÉùÃ÷Ϊ¾ßÓÐÏàͬÀàÐ͵ÄÊý¾Ý¿âÐеÄ×÷·¨ÊǺܳ£¼ûµÄ¡£PL/SQLÌṩÁË%ROWTYPEÔËËã·û£¬Ê¹µÃÕâÑùµÄ²Ù×÷¸üΪ·½±ã¡£
ÀýÈ磺
DECLARE
v_StudentRecord students%ROWTYPE;
½«¶¨ÒåÒ»¸ö¼Ç¼£¬¸Ã¼Ç¼ÖеÄ×ֶν«Óëstudents±íÖеÄÁÐÏà¶ÔÓ¦¡£
ÀýÈ磺
declare
v_jobs hr.jobs%rowtype;
begin
select * into v_jobs
from hr.jobs
where job_id ='&aa';
dbms_output.put_line('ÐòºÅ'||v_jobs.job_id );
dbms_output.put_line('Ãû³Æ'||v_jobs.job_title);
end;
Ö´ÐУ¬ÎÒÃÇÊäÈëaa±äÁ¿µÄÖµ£ºAD_VP
Êä³ö½á¹ûΪ£º
ÐòºÅAD_VP
Ãû³ÆAdministration Vice President
×÷Õߣºtshfang
À´Ô´: ÄàÅßÎÄÕÂд×÷ http://www.nipei.com ÔÎĵØÖ·£º http://www.nipei.com/article/2384
Ïà¹ØÎĵµ£º
ѧϰOracle DBAÒ²°ë¸ö¶àѧÆÚÁË£¬½ñÌìÃÍÈ»²Å·¢ÏÖ£¬ÔÀ´ÎÒµÄÊ黹ÊǺÜеģ¬ÉϿβÙ×÷ʱºòÒ²Ö»ÊÇÖªµÀ´ó¸ÅÔõô×ö£¬µ«ÊÇÒªÕæµÄÈ«²¿×Ô¼º×ö£¬¶ø²»È¥·Ê黹ÊÇÓÐÒ»¶¨µÄÄѶȵģ¬ËùÒÔÄØ£¬½ñÌ쿪ʼ½«DBA´ÓÍ·¸´Ï°Ò»±é£¬Í¬Ê±ÔÙ²Ù×÷Ò»±é¡£
µÚÒ»Õ£¬Ñ§µÄÊÇOracleµÄÌåϵ½á¹¹£ ......
ÔÚOracleÖв鿴ËùÓеıí:
select * from tab/dba_tables/dba_objects/cat;
¿´Óû§½¨Á¢µÄ±í :
select table_name from user_tables; //µ±Ç°Óû§µÄ±í
select table_name from all_tables; //ËùÓÐÓû§µÄ±í   ......
OracleÊý¾Ý¿âÓαêʹÓ÷½·¨
2009-12-30 15:27
SQLÊÇÓÃÓÚ·ÃÎÊOracleÊý¾Ý¿âµÄÓïÑÔ£¬PL/SQLÀ©Õ¹ºÍ¼ÓÇ¿ÁËSQLµÄ¹¦ÄÜ£¬ËüͬʱÒýÈëÁ˸üÇ¿µÄ³ÌÐòÂß¼, ÏÂÃæÔÚ±¾ÎÄÖн«¶ÔÓαêµÄʹÓýøÐÐһϽ²½â,Ï£Íû¿ÉÒԺʹó¼Ò¹²Í¬Ñ§Ï°½ø²½¡£
¡¡¡¡Óαê×ÖÃæÀí½â¾ÍÊÇÓζ¯µÄ¹â±ê¡£ÓαêÊÇSQLµÄÒ»¸öÄڴ湤×÷Çø£¬ÓÉϵͳ»òÓû§ÒÔ±äÁ¿µÄÐÎ ......
ÔÎĵØÖ·£ºhttp://www.cnblogs.com/yf520gn/archive/2009/01/12/1374359.html
EXISTSµÄÖ´ÐÐÁ÷³Ì
select * from t1 where exists ( select null from t2 where y = x )
¿ÉÒÔÀí½âΪ:
for x in ( select * from t1 )
loop
if ( exists ( select null from ......
OracleËÀËø
1¡¢Ê²Ã´ÊÇËÀËø
¡¡¡¡ËÀËøÊÇÖ¸ÔÚÒ»×é½ø³ÌÖеĸ÷¸ö½ø³Ì¾ùÕ¼Óв»»áÊͷŵÄ×ÊÔ´£¬µ«Òò»¥ÏàÉêÇë±»ÆäËû½ø³ÌËùÕ¾Óò»»áÊͷŵÄ×ÊÔ´¶ø´¦ÓÚµÄÒ»ÖÖÓÀ¾ÃµÈ´ý״̬¡£ËÀËø²úÉúÓÐËĸö±ØÒªµÄÌõ¼þ£º»¥³âÌõ¼þ£¬²»¿É°þ¶áÌõ¼þ£¬²¿·Ö·ÖÅ䣬ѻ·µÈ´ý£¬ÕâËĸöÌõ¼þ²»Êdzä·ÖÌõ¼þ£¬¼´Ê¹ÕâËĸöÌõ¼þͬʱ´æÔÚ£¬ÏµÍ³Ò²²»Ò»¶¨·¢ÉúËÀËø£¬µ«ÏµÍ³Ò»µ ......