Oracle 查询表 视图 序列 表数据条数等信息查询
这几天做性能优化，网上找了些资料。
有时候需要导出某用户下的所有table、view、sequence、trigger等信息，下面的SQL可以将这些信息select出来：
select * from user_tables;
select * from user_views;
select * from user_sequences;
select * from user_triggers;
select * from user_views;
select * from user_sequences;
select * from user_triggers;
想查找表的数据条数
试试这个
select t.table_name,t.num_rows from user_tables t
如果没有值，那就创建个函数
代码
create or replace function count_rows(table_name in varchar2,
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
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
再执行查询
select table_name, count_rows(table_name) nrows from user_tables
