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(Sno,Tno)和{Cno,Cname,Grade,Tno,Tname} (Sno, Cno, Tno)和{Sno, Sname, Sex, Birthday, Cno} (Sno, Cno)和{Sno, Sname, Sex, Birthday, Cno, Cname, Grade} (Sno, Cno, Tno)和{Sno, Sname, Sex, Birthday, Tno, Tname}
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(Sno,Tno)和{Cno,Cname,Grade,Tno,Tname} (Sno, Cno,Tno) 和{Sno, Sname, Sex, Birthday, Cno} (Sno, Cno)和{Sno, Sname, Sex, Birthday, Cno, Cname, Grade} (Sno, Cno,Tno)和{Sno, Sname, Sex, Birthday, Tno, Tname}
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MODIFY sc SET grade+10 UPDATE sc SET grade+10 MODIFY sc SET grade=grade+10 UPDATE sc SET grade=grade+10
MODIFY sc SET grade+10 UPDATE sc SET grade+10 MODIFY sc SET grade=grade+10 UPDATE sc SET grade=grade+10
MODIFY sc SET grade+10 UPDATE sc SET grade+10 MODIFY sc SET grade=grade+10 UPDATE sc SET grade=grade+10
MODIFY sc SET grade+10 UPDATE sc SET grade+10 MODIFY sc SET grade=grade+10 UPDATE sc SET grade=grade+10
MODIFY sc SET grade+10 UPDATE sc SET grade+10 MODIFY sc SET grade=grade+10 UPDATE sc SET grade=grade+10
MODIFY sc SET grade+10 UPDATE sc SET grade+10 MODIFY sc SET grade=grade+10 UPDATE sc SET grade=grade+10
MODIFY sc SET grade+10 UPDATE sc SET grade+10 MODIFY sc SET grade=grade+10 UPDATE sc SET grade=grade+10