SELECT?b.column_name column_name -字段名
,b.data_type data_type -字段類型
,b.data_length -字段長度
,a.comments comments -字段註釋
FROM?user_col_comments a
,all_tab_columns b
WHERE?a.table_name = b.table_name and
a.table_name = 'table_name';
擴展資料:
關於獲取oracle表中所有需要的信息(字段、註釋、類型等等)
壹、獲取表字段:
select *?
from user_tab_columns?
where Table_Name='用戶表'?
order by column_name
二、獲取表註釋:
select *?
from user_tab_comments?
where Table_Name='用戶表'
order by Table_Name
三、獲取字段註釋:
select *?
from user_col_comments?
where Table_Name='用戶表'
order by column_name
/* 獲取表:*/
select table_name from user_tables; //當前用戶的表 ?
select table_name from all_tables; //所有用戶的表?
select table_name from dba_tables; //包括系統表
select table_name from dba_tables where owner='zfxfzb'
/*?
user_tables:
table_name,tablespace_name,last_analyzed等
dba_tables:
ower,table_name,tablespace_name,last_analyzed等
all_tables:
wer,table_name,tablespace_name,last_analyzed等
all_objects:
ower,object_name,subobject_name,object_id,created,last_ddl_time,timestamp,status等?
*/
/*? 獲取表字段:*/
select * from user_tab_columns where Table_Name='用戶表';
select * from all_tab_columns where Table_Name='用戶表';
select * from dba_tab_columns where Table_Name='用戶表';
/* 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?
*/
/*? 獲取表註釋:*/
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。?
*/
/* 獲取字段註釋:*/
select * from all_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。?
*/