Oracle query table and column information ____oracle
Source: Internet
Author: User
1, query all tables and table comments:
Sql> Select T.table_name, t.last_analyzed,s.comments from User_all_tables T, user_tab_comments s where T.TABLE_NAME = S.table_name;
TABLE_NAME last_analyzed COMMENTS
------------------------------ ------------- -------------------------------------------------------------------- ------------
City 2015/2/11 22: Urban Information table
College_news 2015/2/11 22: College Press
2, query a table for all columns and other information:
Select
T.column_name,t.data_length,c.comments, T.data_type,t.data_precision,t.data_scale,t.data_default,t.nullable,t. Last_analyzed
From
User_tab_columns t,user_col_comments c where t.table_name = C.table_name
and t.column_name = c.column_name and t.table_name = ' City ';
column_name Data_length COMMENTS Data_type data_precision Data_scale Data_default NULLABLE last_analyzed
------------------------------ ----------- ---------------------------------------------------------------------- ---------- -------------------------------------------------------------------------------- -------------- ------- --- -------------------------------------------------------------------------------- -------- -------------
ID  22 primary Key ID &N Bsp &NB Sp number &NBS P &NB Sp 0 &N Bsp &NB Sp n  2015/2/11 22:
parent_id 22 parent Node ID &NB Sp number &NBS P &NB Sp 0 &N Bsp &NB Sp &nbsP y  2015/2/11 22:
NAME &NBS P 80 name &NBSP ; &NB Sp  VARCHAR2 &N Bsp &NB Sp &NB Sp &NB Sp   y  2015/2/11 22:
Create_by 22 founder &N Bsp &NB Sp number &NBS P &NB Sp 0 &N Bsp &NB Sp y  2015/2/11 22:
Create_time  7 when created Between & nbsp &NB Sp date &N Bsp &NB Sp &NB Sp &NB SP y  2015/2/11 22:
Last_update_by 22 last modified person &NB Sp  NUMB ER &NB Sp 0 &N Bsp &NB Sp y  2015/2/11 22:
Last_update_time 7 Last modified time &NBS P &NB Sp date &N Bsp &NB Sp &NB Sp &NB Sp &NBSp Y  2015/2/11 22:
Enable_flag 22 identifier &nbs P &NB Sp &NB Sp number &NBS P &NB Sp 1 0 & nbsp &NB Sp y  2015/2/11 22:
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