Oracle使用总结

Posted 2020-09-20

一、修改表名要修改索引以及主键

ALTER TABLE AFA_AUTH_FUNCTION RENAME TO BACK_AFA_AUTH_FUNCTION    ----修改表名
alter table BACK_AFA_AUTH_FUNCTION rename constraint PK_AFA_AUTH_FUNCTION to PK_BACK_AFA_AUTH_FUNCTION;    ----修改主键
alter index PK_AFA_AUTH_FUNCTION rename to PK_BACK_AFA_AUTH_FUNCTION;　　　　　　----修改索引

在做不同系统的集成时，有的表重复了，又不想删除，这时候就可以修改相应的表名、主键名、索引名

二、Case-When用法

update afa_auth_role set FSUBSYSTEMID=
 (case
         when FSUBSYSTEMID = ‘c08af79072f444878c7c5deea25187aa‘ then
          ‘NONTAX-PLATFROM‘
         when FSUBSYSTEMID = ‘896a7961034b4559b4fc4a1520460075‘ then
          ‘NONTAX-BASE‘
         when FSUBSYSTEMID = ‘8c36fdbdce80424a9ae3f11183e19f47‘ then
          ‘NONTAX-AGENCY‘
           when  FSUBSYSTEMID = ‘0816b0670e7d428d886e54e7fc0fcb5a‘ then
          ‘NONTAX-FINANCE‘
  end);

注意相关的写法。

三、insert 与时间行数等配合使用

Insert into afa_org (ORG_ID, ORG_CODE, ORG_NAME, PARENT_ORG_ID, ORG_LEVEL, IS_LEAF, ORG_TYPE, STATUS, CREATE_TIME, LASTEST_TIME)
select  t.fid as ORG_ID,
         t.ffindeptcode as ORG_CODE,
         t.ffindeptname as ORG_NAME,
         t.frgnid as PARENT_ORG_ID,
         null as ORG_LEVEL,
         null as IS_LEAF,
         ‘FINDEPT‘ as ORG_TYPE,
         t.fisenable as STATUS,
         to_date(t.fcreatetime,‘yyyy-mm-dd hh24:mi:ss‘) as CREATE_TIME,         
         to_date(TO_CHAR(to_timestamp(t.fupdatetime, ‘yyyymmddhh24missff3‘),
                         ‘yyyy-mm-dd hh24:mi:ss‘),
                 ‘yyyy-mm-dd hh24:mi:ss‘) as LASTEST_TIME from fab_fin_dept t;

注意相关函数的配合使用。

四、相关技巧

select (t4.fcode || ‘_‘ || t3.fcode) as PARTY_CODE

通过||可以将两个字段合并

    update afa_app_function set func_seq= (APP_ID ||func_seq) where APP_ID<>‘APPCENTER‘;

<>不等于标志