动态sql

新增

    insert into t_tablename
    
        user_id,
    
    
        #{name},
    

修改

    update set t_tablename
    
      username = #{username},
      user_id = #{userId},
      sex = #{sex},
    
    where
        id = #{id}

查询

    bct.company_id as companyId,bct.pic2 as pic2,


    bc.name as cName


    select
        
        
    from t_b_c_t bct
    left join t_b_c bc
    
        bct.co_id = #{cId}
        and bct.id in
        
            #{id}
        
    

like模糊查询

    select *
    from t_user
    
        
            and name like concat('%',#{contactName},'%')