~~~ public enum CompareType { // 大于 Greater = 0, // 不大于（小于或等于） LessThanOrEqual = 1, // 小于 LessThan = 2, // 不小于（大于或等于） GreaterThanOrEqual = 3, // 相等 Equal = 4, // 不等于 NotEqual = 5, // 类似于 Like = 6, // IS NULL / IS NOT NULL IS = 7, // IN 查询 IN = 8, // Not In 查询 NotIn = 9, // IS NOT NULL IsNot = 10, // BETWEEN 在某两个值之间 Between = 11, } ~~~