Oracle查詢表、視圖、序列等信息查詢 |
發(fā)布時間: 2012/8/11 16:41:16 |
這幾天做Oracle性能優(yōu)化,網(wǎng)上找了些資料。 有時候需要導出某用戶下的所有table、view、sequence、trigger等信息,下面的SQL可以將這些信息select出來: select * from user_tables; select * from user_views; select * from user_sequences; select * from user_triggers; 想查找表的數(shù)據(jù)條數(shù) 試試這個 select t.table_name,t.num_rows from user_tables t 如果沒有值,那就創(chuàng)建個函數(shù) 代碼 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 再執(zhí)行查詢 select table_name, count_rows(table_name) nrows from user_tables 本文出自:億恩科技【mszdt.com】 |