发布网友 发布时间:2022-04-21 22:18
共2个回答
懂视网 时间:2022-04-30 14:39
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
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
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。
select * from user_col_comments
user_col_comments:table_name,column_name,comments
热心网友 时间:2022-04-30 11:47
分两种方法:
1、在命令窗口通过如下语句:
desc 表名;
2、用语句:
select COLUMN_NAME,DATA_TYPE,DATA_LENGTH from user_tab_cols where table_name='TEST';