<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.imooc.demo.dao.AreaDao">
	<select id="queryArea" resultType="com.imooc.demo.entity.Area">
		SELECT area_id, area_name,
		priority, create_time, last_edit_time
		FROM tb_area
		ORDER BY priority
		DESC
	</select>
	<select id="queryAreaById" resultType="com.imooc.demo.entity.Area">
		SELECT area_id, area_name,
		priority, create_time, last_edit_time
		FROM tb_area
		WHERE
		area_id=#{areaId}
	</select>
	<insert id="insertArea" useGeneratedKeys="true" keyProperty="areaId"
		keyColumn="area_id" parameterType="com.imooc.demo.entity.Area">
		INSERT INTO
		tb_area(area_name,priority,
		create_time,last_edit_time)
		VALUES
		(#{areaName},#{priority},
		#{createTime},#{lastEditTime})
	</insert>
	<update id="updateArea" parameterType="com.imooc.demo.entity.Area">
		update tb_area
		<set>
			<if test="areaName != null">area_name=#{areaName},</if>
			<if test="priority != null">priority=#{priority},</if>
			<if test="lastEditTime != null">last_edit_time=#{lastEditTime}</if>
		</set>
		where area_id=#{areaId}
	</update>
	<delete id="deleteArea">
		DELETE FROM
		tb_area
		WHERE
		area_id =
		#{areaId}
	</delete>
</mapper>