1. 說明：復制表(只復制結構，源表名：a，新表名：b)
SQL: select * into b from a where 1<>1;
2. 說明：拷貝表(拷貝數據，源表名：a，目標表名：b)
SQL: insert into b(a, b, c) select d, e, f from b;
3. 說明：顯示文章、提交人和最后回復時間
SQL: select a.title, a.username, b.adddate from table a,( select max(adddate) adddate from table where table.title=a.title) b |
4. 說明：外連接查詢(表名1：a，表名2：b)
SQL: select a.a, a.b, a.c, b.c, b.d, b.f from a LEFT OUT JOIN b ON a.a = b.c; |
5. 說明：日程安排提前五分鐘提醒
SQL: select * from 日程安排 where datediff(''minute'', f開始時間, getdate())>5 |
6. 說明：兩張關聯表，刪除主表中已經在副表中沒有的信息
SQL: delete from info where not exists( select * from infobz where info.infid=infobz.infid ); |
7. 說明：——
SQL: SELECT A.NUM, A.NAME, B.UPD_DATE, B.PREV_UPD_DATE FROM TABLE1,(SELECT X.NUM, X.UPD_DATE, Y.UPD_DATE PREV_UPD_DATE FROM (SELECT NUM, UPD_DATE, INBOUND_QTY, STOCK_ONHAND FROM TABLE2 WHERE TO_CHAR(UPD_DATE,''YYYY/MM'') = TO_CHAR(SYSDATE, ''YYYY/MM'')) X, (SELECT NUM, UPD_DATE, STOCK_ONHAND FROM TABLE2 WHERE TO_CHAR(UPD_DATE,''YYYY/MM'') = TO_CHAR(TO_DATE(TO_CHAR(SYSDATE, ''YYYY/MM'') || ''/01'',''YYYY/MM/DD'') - 1, ''YYYY/MM'') ) Y, WHERE X.NUM = Y.NUM （+）AND X.INBOUND_QTY + NVL(Y.STOCK_ONHAND,0) <> X.STOCK_ONHAND ) B WHERE A.NUM = B.NUM; |
8. 說明：——
SQL: select * from studentinfo where not exists(select * from student where studentinfo.id=student.id) and 系名稱=''"&strdepartmentname&"'' and 專業名稱=''"&strprofessionname&"'' order by 性別, 生源地, 高考總成績; |
(T111)
