oracle Óαê
oracle Óαê
¹Ø¼ü×Ö: oracle Óαê
1. Óαê: ÈÝÆ÷£¬´æ´¢SQLÓï¾äÓ°ÏìÐÐÊý¡£
2. ÓαêÀàÐÍ: ÒþʽÓα꣬ÏÔʾÓα꣬REFÓαꡣÆäÖУ¬ÒþʽÓαêºÍÏÔʾÓαêÊôÓÚ¾²Ì¬Óα꣨ÔËÐÐǰ½«ÓαêÓëSQLÓï¾ä¹ØÁª£©,REFÓαêÊôÓÚ¶¯Ì¬Óαê(ÔËÐÐʱ½«ÓαêÓëSQLÓï¾ä¹ØÁª)¡£
3. ÒþʽÓαê: DMLÓï¾ä¶ÔÓ¦µÄÓα꣬ÓÉOracle×Ô¶¯¹ÜÀí£¬Ò²³ÆSQLÓαꡣ£¨ËùÓеÄDML²Ù×÷¶¼±»OracleÄÚ²¿½âÎöΪһ¸öcursorÃûΪSQLµÄÒþʽÓα꣩
q ÒþʽÓαêµÄÊôÐÔÓУº
q %FOUND – SQL Óï¾äÓ°ÏìÁËÒ»Ðлò¶àÐÐʱΪ TRUE
q %NOTFOUND – SQL Óï¾äûÓÐÓ°ÏìÈκÎÐÐʱΪTRUE
q %ROWCOUNT – SQL Óï¾äÓ°ÏìµÄÐÐÊý
q %ISOPEN - ÓαêÊÇ·ñ´ò¿ª£¬Ê¼ÖÕΪFALSE
¾ÙÀý˵Ã÷£º
Sql´úÂë
declare
v_empno emp.empno %type:=7000;
begin
update emp set ename='fxe' where empno=v_empno;
if SQl%found then
dbms_output.put_line(SQL%rowcount||'Delete Ok!');
end if;
if SQL%notfound then -- Ò»ÌõSQL¾Í±íʾÊÇÒ»¸öÒþʽÓαê
dbms_output.put_line('¹ÍÔ±±àºÅ'||v_empno||'²»´æÔÚ');
end if;
end;
declare
v_empno emp.empno %type:=7000;
begin
update emp set ename='fxe' where empno=v_empno;
if SQl%found then
dbms_output.put_line(SQL%rowcount||'Delete Ok!');
end if;
if SQL%notfound then -- Ò»ÌõSQL¾Í±íʾÊÇÒ»¸öÒþʽÓαê
dbms_output.put_line('¹ÍÔ±±àºÅ'||v_empno||'²»´æÔÚ');
end if;
end;
4. ÏÔʾÓαê
Ïà¹ØÎĵµ£º
Oracle µÄ¹ÜÀí¿ÉÒÔͨ¹ýOEM»òÕßÃüÁîÐнӿڡ£ Oracle ClusterwareµÄÃüÁ¿ÉÒÔ·ÖΪÒÔÏÂ4ÖÖ£º
½Úµã²ã£ºosnodes
ÍøÂç²ã£ºoifcfg
¼¯Èº²ã£ºcrsctl, ocrcheck,ocrdump,ocrconfig
Ó¦Óò㣺srvctl,onsctl,crs_stat
ÏÂÃæ·Ö±ðÀ´½éÉÜÕâЩÃüÁî¡£
Ò»£® ½Úµã²ã
Ö»ÓÐÒ»¸öÃüÁ¡¡osnodes£¬ Õâ ......
Âß¼ÉÏ£º
Single column µ¥ÐÐË÷Òý
Concatenated ¶àÐÐË÷Òý
Unique ΨһË÷Òý
NonUnique ·ÇΨһË÷Òý
Function-basedº¯ÊýË÷Òý
Domain ÓòË÷Òý
ÎïÀíÉÏ£º
Partitioned ·ÖÇøË÷Òý
NonPartitioned ·Ç·ÖÇøË÷Òý
B-tree£º
Normal Õý³£ÐÍBÊ÷
Rever Key ·´×ªÐÍBÊ÷
Bitmap λͼË÷Òý
Ë÷Òý½á¹¹£º
B-tree£º
ÊʺÏÓë´óÁ¿µÄÔö¡¢É ......
±íÀàÐÍ£º
1¶Ñ×éÖ¯±í£¨heap organized table£©£ºÕâЩ¾ÍÊÇ“ÆÕͨ”µÄ±ê×¼Êý¾Ý¿â±í¡£Êý¾ÝÒԶѵķ½Ê½¹ÜÀí¡£¶Ñ£¨heap£©ÊÇÒ»×é¿Õ¼ä£¬ÒÔÒ»ÖÖÓÐÐ©Ëæ»úµÄ·½Ê½Ê¹Óá£
2Ë÷Òý×éÖ¯±í£¨index organized table£©£ºÕâЩ±í°´Ë÷Òý½á¹¹´æ´¢¡£Õâ¾ÍÇ¿ÖÆÒªÇóÐб¾ÉíÓÐijÖÖÎïÀí˳Ðò¡£Ë÷Òý×éÖ¯±íIOTÖУ¬Êý¾ÝÒª¸ù¾ÝÖ÷¼üÓÐÐòµØ´æ´¢¡£
3Ë÷Ò ......
ÔÚOracleÖеÄÊ÷ÐβÙ×÷
1.È¡×ӽڵ㼰·¾¶(ÕýÊ÷):
select t.id ,t.code, t.name ,t.pid
,SYS_CONNECT_BY_PATH(t.id,'.')||'.' as IdPath
from tas_catalog t
--where id!=110
start with id=110
connect by pid = prior id
order siblings by id
2.È¡¸÷¼¶¸¸½Úµã(µ¹Ê÷)£º
select t.id ,t.code, t.na ......