ORACLE to_char函数详解
转自:http://wisebo.bokee.com/viewdiary.15801227.htmlThe following are number examples for the to_char function.to_char(1210.73, '9999.9')would return '1210.7'to_char(1210.73, '9,999.99')would...
Oracle JOB 用法小结
一、设置初始化参数 job_queue_processes sql> alter system set job_queue_processes=n;(n>0) job_queue_processes最大值为1000 查看job queue 后台进程 sql>select name,description from v$bgp...
JOB详解
每天1点执行的oracle JOB样例DECLAREX NUMBER;BEGINSYS.DBMS_JOB.SUBMIT( job => X,what => 'ETL_RUN_D_Date;',next_date => to_date('2009-08-26 01:00:00','yyyy-mm-dd hh24:mi:ss'),interval => 'trunc(sysdate...
Oracle-主键约束、唯一约束与外键约束
1.主键约束: 一个表只能有一个主键约束。主键可以是单个字段,也可以是多个字段。无论是哪种情况,其所有字段都是NOT NULL。2.Unique约束:一个表可以有多个Unique约束,Unique的字段可以为NULL。3.主键与Unique...