下面选项中,用于将表student中字段grade值更新为80的SQL语句是 A: ALTERTABLEstudentsetgrade=80; B: UPDATEstudentsetgrade=80wheregrade=80; C: UPDATEstudentsetgrade=80wheregrade<=80; D: UPDATEstudentsetgrade=80;
下面选项中,用于将表student中字段grade值更新为80的SQL语句是 A: ALTERTABLEstudentsetgrade=80; B: UPDATEstudentsetgrade=80wheregrade=80; C: UPDATEstudentsetgrade=80wheregrade<=80; D: UPDATEstudentsetgrade=80;
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