mysql的between查到的是一个闭区间 包括边界值，且值大于等于左区间小于等于右区间

select id from t_invoice_detail where id BETWEEN 66 and 68 查出来的结果包括66和68在内 等同于求id>=66 and id<=68 select id from t_invoice_detail where id BETWEEN 68 and 66 调换顺序 且值大于等于左区间小于等于右区间 等同于求id>=68 and id<=66

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