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SELECT SNO,SNAME FROMSWHERE SNAME=’王%’ SELECT SNO,SNAME FROM S WHERE SNAME=’王_’ SELECT SNO,SNAMEFROMS WHERE SNAME LIKE ’王%’ SELECT SNO,SNAME FROM S WHERE SNAME LIKE ’王_’
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SELECT SNO FROMSC WHERE CNO=’DB’ AND GRADE BETWEEN 60 AND 90 SELECT SNO FROM SC WHERE CNO=’DB’ OR GRADE BETWEEN 60 AND 90 SELECT SNO FROM SC WHERE CNO=’DB’ AND GRADE>=60 AND 90 SELECTSNO FROM SCWHERECNO=’DB’ AND GRADE<=60 AND GRADE>=90
SELECT SNO,SNAME FROMSWHERE SNAME=’王%’ SELECT SNO,SNAME FROM S WHERE SNAME=’王_’ SELECT SNO,SNAMEFROMS WHERE SNAME LIKE ’王%’ SELECT SNO,SNAME FROM S WHERE SNAME LIKE ’王_’
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