Oracle查看所有表和字段
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='用户名'
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。
例如:
1、查看表用户scott下的表EMP中的所有字段:
select COLUMN_NAME from user_tab_columns t where t.TABLE_NAME='EMP'; //注:表名要大写
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