Oracle 查询表信息获取表字段及字段注释

时间:2021-11-12 07:13:02

获取表字段:

?
1
2
3
4
select *
from user_tab_columns
where Table_Name='用户表'
order by column_name

获取表注释:

?
1
2
3
4
5
select *
from user_tab_comments
where Table_Name='用户表'
 
order by Table_Name

获取字段注释:

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
select *
from user_col_comments
where Table_Name='用户表'
 
order by column_name
 
/* 获取表:*/
 
select table_name from user_tables; //当前用户的表
 
select table_name from all_tables; //所有用户的表
 
select table_name from dba_tables; //包括系统表
 
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:
 
ower,table_name,tablespace_name,last_analyzed等
 
all_objects:
 
ower,object_name,subobject_name,object_id,created,last_ddl_time,timestamp,status等
*/
 
/* 获取表字段:*/
 
select * from user_tab_columns where Table_Name='用户表';
 
select * from all_tab_columns where Table_Name='用户表';
 
select * from dba_tab_columns where Table_Name='用户表';
 
/* 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
*/
 
/* 获取表注释:*/
 
select * from user_tab_comments
 
/*
user_tab_comments:table_name,table_type,comments
 
相应的还有dba_tab_comments,all_tab_comments,这两个比user_tab_comments多了ower列。
*/
 
/* 获取字段注释:*/
 
select * from user_col_comments
 
/*
 
user_col_comments:table_name,column_name,comments
 
相应的还有dba_col_comments,all_col_comments,这两个比user_col_comments多了ower列。
*/