示例：
record_date 日期；
record_time 时间
中间加空格符合日期时间格式

AND CONVERT ( DATETIME, record_date + ' ' + record_time ) >= '2022-03-08 14:44:13' 

下面是完整代码：

SELECT
	c.work_shift,
	c.pid ,
	c.num,
	d.lose ,
	gp.username,
	c.recordName 
FROM
	(
	SELECT
		a.work_shift,
		a.pid,
		a.recordName,
		COUNT ( a.date ) num 
	FROM
		(
		SELECT
			pid,
			record_date DATE,
			work_shift,
			recordName 
		FROM
			greenRecord 
		WHERE
			1 = 1 
			**AND CONVERT ( DATETIME, record_date + ' ' + record_time ) >= '2022-03-08** 14:44:13' 
			AND CONVERT ( DATETIME, record_date + ' ' + record_time ) <= '2022-03-22 14:44:21' 
		GROUP BY
			record_date,
			pid,
			work_shift,
			recordName 
		) a 
	GROUP BY
		a.pid,
		a.work_shift,
		a.recordName 
	) c
	LEFT JOIN (
	SELECT COUNT
		( b.date ) lose,
		b.pid 
	FROM
		(
		SELECT
			pid,
			record_date,
			COUNT ( record_date ) DATE 
		FROM
			greenRecord 
		WHERE
			1 = 1 
			AND CONVERT ( DATETIME, record_date + ' ' + record_time ) >= '2022-03-08 14:44:13' 
			AND CONVERT ( DATETIME, record_date + ' ' + record_time ) <= '2022-03-22 14:44:21' 
		GROUP BY
			record_date,
			pid 
		HAVING
			COUNT ( record_date ) < 2 
		) b 
	GROUP BY
		b.pid 
	) d ON c.pid = d.pid
	LEFT JOIN greenPerson gp ON gp.identity_card= c.pid 
WHERE
	1 =1