select * from dba_tables where tablespace_name='DIGITPARTY'
所有表 DIGITPARTY为表空间名称,区分大小写
select * from user_tables 查看所有表
select * from all_views where owner=‘DIGITPARTY’ 所有视图 DIGITPARTY为用户名
select * from all_triggers where owner='DIGITPARTY'; 所有触发器
select table_name,count(*) from user_tab_columns where table_name in (select table_name from dba_tables where tablespace_name='DIGITPARTY')
group by table_name order by table_name 查看表的列数
select column_name,data_type ,data_length,data_precision,data_scale,table_name
from user_tab_columns where table_name in (select table_name from dba_tables where tablespace_name='DIGITPARTY') order by table_name 查看表的列项
select t.table_name,t.num_rows from user_tables t order by table_name 表的记录数
owner in varchar2 default null)
return number
authid current_user
IS
num_rows number;
stmt varchar2(2000);
begin
if owner is null then
stmt := 'select count(*) from "'||table_name||'"';
else
stmt := 'select count(*) from "'||owner||'"."'||table_name||'"';
end if;
execute immediate stmt into num_rows;
return num_rows;
end;
select table_name, count_rows(table_name) nrows from user_tables
select t.*,i.index_type from user_ind_columns t,user_indexes i
where t.index_name = i.index_name and t.table_name = i.table_name and t.table_name in (select table_name from user_tables) 查看索引
SELECT COUNT(*) FROM (
select t.*,i.index_type from user_ind_columns t,user_indexes i
where t.index_name = i.index_name and t.table_name = i.table_name and t.table_name in (select table_name from user_tables) ) 查看索引数
2、查找表的主键(包括名称,构成列):
select cu.* from user_cons_columns cu, user_constraints au where cu.constraint_name = au.constraint_name and au.constraint_type = 'P' and au.table_name = 表名
3、查找表的唯一性约束(包括名称,构成列):
select column_name from user_cons_columns cu, user_constraints au where cu.constraint_name = au.constraint_name and au.constraint_type = 'U' and au.table_name = 表名
4、查找表的外键(包括名称,引用表的表名和对应的键名,下面是分成多步查询):
select * from user_constraints c where c.constraint_type = 'R' and c.table_name = 表名
外键约束的列名:
select * from user_cons_columns cl where cl.constraint_name = 外键名称
引用表的键的列名:
select * from user_cons_columns cl where cl.constraint_name = 外键引用表的键名
5、查询表的所有列及其属性:
select t.*,c.COMMENTS from user_tab_columns t,user_col_comments c where t.table_name = c.table_name and t.column_name = c.column_name and t.table_name = 表名