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4£®¼ÙÉèij¡°²Ö¿â¹ÜÀí¡±¹ØÏµÐÍÊý¾Ý¿âÓÐÏÂÁÐÎå¸ö¹ØÏµÄ£Ê½£º Áã¼þPART(PNO,PNAME,COLOR,WEIGHT) ÏîÄ¿PROJECT(JNO,JNAME,JDATE)

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(1) ÊÔ½«PROJECT¡¢P_P¡¢PARTÈý¸ö»ù±¾±íµÄ×ÔÈ»Áª½Ó¶¨ÒåΪһ¸öÊÓͼVIEW1£¬ PART¡¢P_S¡¢SUPPLIERÈý¸ö»ù±¾±íµÄ×ÔÈ»Áª½Ó¶¨ÒåΪһ¸öÊÓͼVIEW2¡£ (2) ÊÔÔÚÉÏÊöÁ½¸öÊÓͼµÄ»ù´¡ÉϽøÐÐÊý¾Ý²éѯ£º ¢Ù ¼ìË÷ÉϺ£µÄ¹©Ó¦ÉÌËù¹©Ó¦µÄÁã¼þµÄ±àºÅºÍÃû×Ö¡£

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AS SELECT A.JNO,JNAME,DATE,C.PNO,PNAME,COLOR,WEIGHT,TOTAL FROM PROJECT A,P_P B£¬PART C

WHERE A.JNO=B.JNO AND B.PNO=C.PNO; CREATE VIEW VIEW2

AS SELECT A.PNO,PNAME,COLOR,WEIGHT,C.SNO,SNAME,SADDR,QUANTITY

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FROM PART A,P_S B,SUPPLIER C

WHERE A.PNO=B.PNO AND B.SNO=C.SNO; (2) ¢Ù

SELECT PNO,PNAME FROM VIEW2

WHERE SADDR LIKE ¡¯ÉϺ££¥¡¯; ¢Ú SELECT SNO,SNAME FROM VIEWl,VIEW2

WHERE VIEWl.PNO=VIEW2.PNO AND JNO=¡¯J4¡¯;

5. ¶ÔÓÚ½ÌÎñ¹ÜÀíÊý¾Ý¿âÖлù±¾±íSC£¬½¨Á¢ÊÓͼÈçÏ£º CREATE VIEW S_GRADE(SNO,C_NUM,AVG_GRADE) AS SELECT SNO,COUNT(CNO),AVG(GRADE) FROM SC

GROUP BY SNO

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(1) SELECT * FROM S_GRADE (2) SELECT SNO,C_NUM FROM S_GRADE

WHERE AVG_GRADE>80; (3) SELECT SNO,AVG_GRADE FROM S_GRADE

WHERE C_NUM>(SELECT C_NUM FROM S_GRADE SNO=¡¯200912121¡¯); (4) UPDATE S_GRADE

SET C_NUM=C_NUM+1 WHERE SNO=¡¯200915122¡¯ (5) DELETE FROM S_GRADE WHERE C_NUM>4;

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SELECT SNO,COUNT(CNO) AS C_NUM,AVG(GRADE) AS AVG_GRADE FROM SC

GROUP BY SNO;

¢Æ ÔÊÐí²éѯ¡£ÏàÓ¦µÄ²Ù×÷ÈçÏ£º

SELECT SNO,COUNT(CNO)AS C_NUM FROM SC

GROUP BY SNO

HAVING AVG(GRADE)>80;

¢Ç ÔÊÐí²éѯ¡£ÏàÓ¦µÄ²Ù×÷ÈçÏ£º

SELECT SNO,AVG(GRADE) AS AVG_GRADE FROM SC

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GROUP BY SNO

HAVING COUNT(CNO)>(SELECT COUNT(CNO) FROM SC

GROUP BY SNO

HAVING SNO=¡¯200912121¡¯);

¢È ²»ÔÊÐí¡£C_NUMÊǶÔSCÖеÄѧÉúÑ¡Ð޿γ̵ÄÃÅÊý½øÐÐͳ¼Æ£¬ÔÚδ¸ü¸ÄSC±íʱ£¬ÒªÔÚÊÓͼS_GRADEÖиü¸ÄÃÅÊý£¬ÊDz»¿ÉÄܵġ£

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CREATE INDEX SC_GRADE ON SC(GRADE DESC) GO

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2£®¶ÔÓÚÀý5.9½Ìѧ¹ÜÀíÊý¾Ý¿âµÄ±íSºÍSC£¬ÓÐÏÂÁгÌÐòÇåµ¥£¬ÊÔÐðÊöÆä¹¦ÄÜ¡£

USE JXGL GO

DECLARE @MyNo CHAR(9) SET @MyNo='S7'

IF (SELECT SDEPT FROM S WHERE SNO=@MyNo)='CS' BEGIN

SELECT AVG(GRADE) AS 'ƽ¾ù³É¼¨' FROM SC

WHERE SNO=@MyNo

END ELSE

PRINT 'ѧºÅΪ'+@MyNo+'µÄѧÉú²»´æÔÚ»ò²»ÊôÓÚ¼ÆËã»ú¿ÆÑ§Ïµ' GO

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4£®AFTER´¥·¢Æ÷ºÍINSTEAD OF´¥·¢Æ÷ÓÐʲô²»Í¬£¿

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5£®ÔÚ½Ìѧ¹ÜÀíÊý¾Ý¿âÖУ¬´´½¨Ò»¸öÃûΪSTU_AGEµÄ´æ´¢¹ý³Ì£¬¸Ã´æ´¢¹ý³Ì¸ù¾ÝÊäÈëµÄѧºÅ£¬Êä³ö¸ÃѧÉúµÄ³öÉúÄê·Ý¡£

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USE JXGL GO

CREATE PROCEDURE STU_AGE @S_NAME CHAR(8) AS

SELECT YEAR(GETDATE()-AGE) AS 'YEAR' FROM S

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