package com.mindskip.xzs.repository;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.mindskip.xzs.domain.QuestionAnswer;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

/**
 * @author gonghl
 * @description 针对表【t_question_answer(问答)】的数据库操作Mapper
 * @createDate 2024-05-11 11:53:55
 * @Entity com.mindskip.xzs.questionAnswer.QuestionAnswer
 */
@Mapper
public interface QuestionAnswerMapper extends BaseMapper<QuestionAnswer> {

    /**
     * 新增时获取目前最大序列
     * @return 序号
     */
    @Select("select ifnull(max(sequence), 1) from t_question_answer")
    Integer getLastSequence();

}