本文使用System.Data.OracleClient方式,這是MS提供的以ADO.NET方式訪問Oracel的驅動;Oracle也有個Oracle Data Provider for .NET(ODP.NET)下篇再討論。訪問Oracle時用戶端(或者web伺服器)得安裝一個Oracle的用戶端,這個有點不爽,SQL
1.根據ROWID來分select * from t_xiaoxi where rowid in(select rid from (select rownum rn,rid from(select rowid rid,cid from t_xiaoxi order by cid desc) where rownum<10000) where rn>9980) order by cid desc;執行時間0.03秒2.按分析函數來分select * from (select t.*,
[ 作者:shuipipi 轉貼自:csdn 點擊數:81 更新時間:2005-11-17 ] 減小字型 增大字型* SQL Group Function* s (num can be a column or expression) (null values are ign* ored, default between distinct and all is all) *********************************** *********
How can an attacker exploit a PL/SQL procedure that doesn’t even take user input? Orhow does one do SQL injection using DATE or even NUMBER data types? In the pastthis has not been possible but as this paper will demonstrate, with a little bit of
Oracle查詢重複資料與重複資料刪除記錄方法 比如現在有一人員表 (表名:peosons) 若想將姓名、社會安全號碼、住址這三個欄位完全相同的記錄查詢出來 select p1.* from persons p1,persons p2 where p1.id<>p2.id and p1.cardid = p2.cardid and p1.pname = p2.pname and p1.address =
本函數可以將“目標字串”以“指定字串”進行拆分,並通過表結構返回結果。代碼如下:CREATE OR REPLACE TYPE str_split IS TABLE OF VARCHAR2 (4000);CREATE OR REPLACE FUNCTION splitstr(p_string IN VARCHAR2, p_delimiter IN VARCHAR2) RETURN str_split PIPELINEDAS v_length NUMBER :=