目录

oracle

 数据表

  视图

mysql

数据表

视图

hive

表

视图

pg

表

视图

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oracle

 数据表

     SELECT a.owner AS owner,a.TABLE_NAME AS bywm,a.comments AS bzwm  FROM all_tab_comments a 
     where a.OWNER 
     NOT IN ('SYS', 'SYSTEM', 'CTXSYS', 'XDB', 'EXFSYS', 'MDSYS', 'OLAPSYS', 'APEX_030200', 'ORDDATA', 'OUTLN', 'SYSMAN', 'WMSYS', 
     'ORDSYS', 'DBSNMP', 'MDDATA','MGMT_VIEW', 'ORDPLUGINS', 'SCOTT', 'SI_INFORMATN_SCHEMA', 'WK_TEST', 'WKPROXY', 'WKSYS', 'WMSYS', 
     'XDB', 'FLOWS_FILES', 'ANONYMOUS', 'APPQOSSYS', 'OWBSYS_AUDIT', 'OWBSYS', 'SI_INFORMTN_SCHEMA', 'IX', 'SH', 'DIP', 'OE', 
     'APEX_PUBLIC_USER', 'HR', 'SPATIAL_CSW_ADMIN_USR', 'ORACLE_OCM', 'SPATIAL_WFS_ADMIN_USR', 'XS$NULL', 'BI', 'PM')

  视图

SELECT
     A.OWNER,
    A.VIEW_NAME ,
    B.*,
    A.TEXT 
FROM
    ALL_VIEWS A,
    ALL_TAB_COMMENTS B 
WHERE
    A.VIEW_NAME = B.TABLE_NAME  AND A.TEXT is not NULL   AND A.OWNER = B.OWNER 
    AND A.OWNER 
     NOT IN ('SYS', 'SYSTEM', 'CTXSYS', 'XDB', 'EXFSYS', 'MDSYS', 'OLAPSYS', 'APEX_030200', 'ORDDATA', 'OUTLN', 'SYSMAN', 'WMSYS', 
     'ORDSYS', 'DBSNMP', 'MDDATA','MGMT_VIEW', 'ORDPLUGINS', 'SCOTT', 'SI_INFORMATN_SCHEMA', 'WK_TEST', 'WKPROXY', 'WKSYS', 'WMSYS', 
     'XDB', 'FLOWS_FILES', 'ANONYMOUS', 'APPQOSSYS', 'OWBSYS_AUDIT', 'OWBSYS', 'SI_INFORMTN_SCHEMA', 'IX', 'SH', 'DIP', 'OE', 
     'APEX_PUBLIC_USER', 'HR', 'SPATIAL_CSW_ADMIN_USR', 'ORACLE_OCM', 'SPATIAL_WFS_ADMIN_USR', 'XS$NULL', 'BI', 'PM')

mysql

数据表

select * from information_schema.tables where table_type='BASE TABLE'
and table_schema not in ('performance_schema', 'mysql', 'sys', 'information_schema')

视图

select * from information_schema.tables 
where table_type in('view','VIEW')
and table_schema not in ('performance_schema', 'mysql', 'sys', 'information_schema')

hive

表

查询表

先切换shema到目标库，然后查表

use bqtest;
show tables；

查具体的表信息，以t_dj_qyxx为例

desc formatted `t_dj_qyxx`

视图

先切换shema到目标库，然后查视图

use bqtest;

show views

pg

表

SELECT
    pc.relname AS bywm,
    pds.description AS bzwm,
    pn.nspname AS OWNER,
    pd.datname AS DATABASE 
FROM
    pg_class pc
    INNER JOIN pg_namespace pn ON pn.oid = pc.relnamespace
    INNER JOIN pg_database pd ON pd.datdba = pn.nspowner 
    AND pd.datistemplate =
    FALSE LEFT JOIN pg_description pds ON pc.oid = pds.objoid 
    AND pds.objsubid = 0 
WHERE
    pc.relkind IN ( 'r', 'p' ) AND pc.oid NOT IN ( SELECT inhrelid FROM pg_inherits )

视图

select schemaname, viewname from pg_views