public Criteria andUserGroupIdGreaterThan(String value) {
            addCriterion("user_group_id >", value, "userGroupId");
            return (Criteria) this;
        }
This class was generated by MyBatis Generator.
This class corresponds to the database table chat_group

@mbg.generated
AnyChatServer/src/main/java/org/anychat/model/base/ChatGroupCriteria.java