Oracle中查看所有表和欄位以及表注釋.欄位注釋

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Oracle中查看所有表和欄位以及表注釋.欄位注釋

Oracle中查看所有表和欄位以及表注釋.欄位注釋

擷取表:

select table_name from user_tables; //目前使用者擁有的表     
 
select table_name from all_tables; //所有使用者的表
select table_name from dba_tables; //包括系統資料表
select table_name from dba_tables where owner='使用者名稱'
 
user_tables:
table_name,tablespace_name,last_analyzed等
dba_tables:
ower,table_name,tablespace_name,last_analyzed等
all_tables:
ower,table_name,tablespace_name,last_analyzed等
all_objects:
ower,object_name,subobject_name,object_id,created,last_ddl_time,timestamp,status等

擷取表欄位:

select * from user_tab_columns where Table_Name='使用者表';
select * from all_tab_columns where Table_Name='使用者表';
select * from dba_tab_columns where Table_Name='使用者表';
user_tab_columns:
table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等
all_tab_columns :
ower,table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等
dba_tab_columns:
ower,table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等

擷取表注釋:

select * from user_tab_comments
user_tab_comments:table_name,table_type,comments
相應的還有dba_tab_comments,all_tab_comments,這兩個比user_tab_comments多了ower列。
擷取欄位注釋:
select * from user_col_comments
user_col_comments:table_name,column_name,comments

相應的還有dba_col_comments,all_col_comments,這兩個比user_col_comments多了ower列。

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