標籤:14、查詢所有學生的Sname、Cno和Degree列。select t.sname,c.cno,c.degree from student t inner join score c on t.sno=c.sno15、查詢所有學生的Sno、Cname和Degree列。select t.sno,s.degree,c.cname from student t ,score s,course c where t.sno=s.sno and
標籤:oracle無法遠端連線重要原因,即使防火牆開放1521連接埠, 但是返回包可能是隨機連接埠,所以仍有可能被防火牆阻止。解決方案:在註冊表中增加一個字串值如下。可解決花費兩天找到的方法[HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\HOME0] "USE_SHARED_SOCKET"="TRUE" ORA-12516: TNS:listener could not find available handler with matching protocol
標籤:A表customers和B表tmp_cust_city有3個相同欄位, customer_id,city_name,customer_type 現要根據b表更新a表更新一個欄位情況:update customers aset city_name=(select b.city_name from tmp_cust_city b where b.customer_id=a.customer_id)where exists (select 1 from tmp_cust_city b
標籤:如果表結構只對應一個欄位,可以 select col1 bulk collect into 變數,不用遊標迴圈,簡潔高效create or replace function get_airway_subpoint(awid in number)return airway_subpnts_tab is--CREATE OR REPLACE TYPE AIRWAY_SUBPNTS_TAB as table of number(11)v_ptns
標籤:一.資料庫語言分類 二.DML之資料插入把一個表中的資料查詢出來插入另外一個表中。create table student(id number,name varchar2(20),age number);insert into student select id,name,age from student1;insert into student select * from student as of timestamp(sysdate-5/1440);
標籤: SELECT * FROM ( SELECT TT.*,ROWNUM RN FROM ( SELECT A.CASE_ID AS TREATID, A.TYPE AS TYPE, B.CONTENT AS CONTENT, B.ADD_USER_ID AS ADDUSERID, B.Add_User_Type AS
標籤:String sql="select * from( select e.*,rownum r from( select * from emp order by sal desc )e ) where r between ? and ? ";String sql="select * from( select e.*,rownum r from( select * from emp order by sal desc )e ) where r between 6 and 10 ";