Oracle:
1.查询表名:
select table_name,tablespace_name,temporary from user_tables //在所有非管理员创建的表中查询
select table_name,tablespace_name,temporary from dba_tables //在所有管理员创建的表中查询
select table_name,tablespace_name,temporary from all_tables //在所有表中查询
select table_name,tablespace_name,temporary from all_tables where table_name='表名' //在所有表中查询指定表
select table_name,tablespace_name,temporary from all_tables where lespace_name='表空间名' //在所有表中查询属性指定表空间的表
其中:table_name:表名(varchar2(30));
tablespace_name:存储表名的表空间(varchar2(30));
temporary:能无法 为暂时表(varchar2(1))。
eg: select table_name,tablespace_name,temporary from user_tables where table_name='TEST_TEMP';
结果:
--------------------------------------------------------------------------------
table_name tablespace_name temporary
TEST_TEMP SDMP N
--------------------------------------------------------------------------------
注:表名变量值必须大写。
2.查询表列名:
SELECT COLUMN_NAME FROM USER_TAB_COLUMNS WHERE TABLE_NAME = '表名' ORDER BY COLUMN_ID
SELECT COLUMN_NAME FROM DBA_TAB_COLUMNS WHERE TABLE_NAME = '表名' ORDER BY COLUMN_ID
SELECT COLUMN_NAME FROM ALL_TAB_COLUMNS WHERE TABLE_NAME = '表名' ORDER BY COLUMN_ID
select column_name,data_type ,data_length,data_precision,data_scale from user_tab_columns where table_name='表名';
其中:column_name:列名(varchar2(30));
data_type:列的数据类型(varchar2(106));
data_length:列的长度(number);
eg:select column_name,data_type ,data_length,data_precision,data_scale from user_tab_columns where table_name='TEST_TEMP';
结果:
column_name data_type data_length data_precision data_scale
ID NUMBER 22 0
NAME NVARCHAR2 20
SEX CHAR 1
GRADE NVARCHAR2 10
--------------------------------------------------------------------------------
注:表名变量值必须大写。
另外,也可以 议决 all_tab_columns来获取有关表的数据。
eg:select * from all_tab_columns where table_name='TEST_TEMP';