ORACLE实验二 - 数据库编程

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ORACLE实验二(二)

2015-07-24 11:27:11 来源: 作者: 【大中小】浏览:6次

CT DISTINCT MAKER,MAX(PRICE) FROM PRODUCT ,PC WHERE PRODUCT.MODEL=PC.MODEL AND TYPE='PC' GROUP BY MAKER; SELECT DISTINCT MAKER,COUNT(*) FROM PRODUCT WHERE TYPE='PC' GROUP BY MAKER HAVING COUNT(*)>=3; UPDATE PRODUCT SET MAKER='B' WHERE MAKER='A'; DELETE PRODUCT P1 WHERE P1.TYPE='LAPTOP' AND EXISTS ( SELECT * FROM PRODUCT P2 WHERE P2.TYPE='Printer' AND P1.MODEL=P2.MODEL ); ROLLBACK;

如有不当之处还请多多指教...

本人劳动成果，还请转载署名出处。。。

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