insert into user (user_id,user_name,create_time) values (#{userId},#{userName},#{createTime}) update user set user_name=#{userName},create_time=#{createTime} where user_id = #{userId} delete from user where user_id = #{userId} select user_id , user_name ,create_time from user select user_id , user_name ,create_time from user where user_id = #{userId}