SELECT * FROM 学生 WHERE 绩点>=3.7 and 绩点<=4.0 and 挂科数=0
SELECT * FROM 学生 WHERE 绩点 BETWEEN 3.7 and 4.0 and 挂科数=0
SELECT * FROM 学生 WHERE 绩点>=3.7 and (绩点<=4.0 and 挂科数=0)
SELECT * FROM 学生 WHERE 挂科数=0 and (绩点>=3.7 OR 绩点<=4.0)
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