OracleÖÐÌí¼ÓJob
OracleÖÐÌí¼ÓJob
--ÿ15·ÖÖÓ trunc(sysdate+1/96,'MI')/*5:Mins*/ sysdate + 5/(60*24)
SQL> variable jobno number;
SQL> begin
2 dbms_job.submit(:jobno,'´æ´¢¹ý³ÌÃû;',sysdate,'/*1:Hr*/ sysdate + 1/24' );
3 commit;
4 end;
5 /
Ïà¹ØÎĵµ£º
ÓÐÈËÓöµ½Õâôһ¸öÎÊÌ⣬·ÃÎÊÒ»¸öÐòÁÐÔõô³ö´íÁË£¬´íÎóÈçÏ£º ORA-08002: ÐòÁÐ SEQ_GX.CURRVAL ÉÐδÔڴ˻ỰÖж¨Òå ÕâÊÇÒòΪÔÚÒ»¸öеĻỰÖУ¬ÐòÁÐÐèÒª³õʼ»¯£¬Ò²¾ÍÊÇͨ¹ý.NEXTVALÀ´Íê³ÉÐòÁеijõʼ»¯¡£ ²âÊÔÈçÏ£º Connected to Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 Connected as crmii SQL> SQ ......
ÈçºÎ¿´¶®ORACLEÖ´Ðмƻ®
Ò»¡¢Ê²Ã´ÊÇÖ´Ðмƻ®
An explain plan is a representation of the access path that is taken when a query is executed within Oracle.
¶þ¡¢ÈçºÎ·ÃÎÊÊý¾Ý
At the physical level Oracle reads blocks of data. The smallest amount of data read is a single Oracle block, the largest is con ......
£¨1 £© ×¢ÒâÔö¼ÓÔ¼ÊøÊ±µÄд·¨£¬ºÍORACLE ÂÔÓв»Í¬
Oracle £º
ALTER TABLE SCHEMA.PREFIX_INFO ADD (
CONSTRAINT PK_PREFIX_INFO PRIMARY KEY (INFO_ID));
PostgresQL £º
alter table schema.prefix_info add constraint prefix_info_pkey primary key(info_id);
£¨2 £©ÏµÍ³Ä¬ÈϵÄ×î´óÖµÓëORACLE ²»Í¬
Oracle £ ......
1. ²é¿´Êý¾ÝµÄ×Ö·û¼¯
sqlplus> col parameter format a30
sqlplus> col value format a30
sqlplus> select * from nls_database_parameter
PARAMETER VALUE
------------------------------ --------------------
...
NLS_CH ......
OracleÖÐstart with…connect by prior×Ó¾äÓ÷¨
connect by Êǽṹ»¯²éѯÖÐÓõ½µÄ£¬Æä»ù±¾Óï·¨ÊÇ£º
select … from tablename
start with Ìõ¼þ1
connect by Ìõ¼þ2
where Ìõ¼þ3;
Àý£º
select * from table
start with org_id = ‘HBHqfWGWPy’
connect by prior org_id = parent_id;
  ......