ccsenscloud/wisdomcar/src/main/resources/mapper_dao/WisdomCarDao.xml

<?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.ccsens.wisdomcar.persist.dao.WisdomCarDao">

    <select id="queryFreeCar" resultType="com.ccsens.wisdomcar.bean.vo.WisdomCarVo$FreeCar">
        ( SELECT id, car_number FROM t_wisdom_car WHERE hospital_id = #{hospitalId} AND rec_status = 0 ) EXCEPT
(
SELECT
	distinct c.id,
	c.car_number
FROM
	t_patient_wisdom_car pc,
	t_wisdom_car c
WHERE
	pc.car_id = c.id
	AND c.hospital_id = #{hospitalId}
	AND pc.end_time = 0
	AND pc.start_time >= ( unix_timestamp( ) - 2 * 60 * 60 ) * 1000
	AND pc.rec_status = 0
	AND c.rec_status = 0
	)
    </select>
    <select id="countUsed" resultType="java.lang.Long">
		SELECT
			count(*)
		FROM
			t_patient_wisdom_car
		WHERE
			car_id = 1
			AND
			((end_time = 0
			AND start_time &gt;=  #{startTime} - 2 * 60 * 60 * 1000)
			or
			<choose>
				<when test="endTime == null or endTime = 0">
					(start_time &lt;= #{startTime} and end_time &gt;=#{startTime})
				</when>
				<otherwise>
					(start_time &lt;= #{endTime} and end_time &gt;= #{startTime})
				</otherwise>
			</choose>
			 )
			AND rec_status = 0
	</select>
</mapper>