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| <?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.tievd.jyz.mapper.CameraMapper">
|
| <select id="findMaxChangeTime" resultType="DATE" parameterType="LONG">
| SELECT
| IFNULL( IF( max( c.create_time ) > max( c.update_time ), max( c.create_time ), max( c.update_time ) ) ,'1970-01-01')
| FROM
| t_camera c
| WHERE c.device_id = #{deviceId}
| </select>
|
| </mapper>
|
|
