mysql查询json中某个字段的值

SELECT b.name,t.name as stage_name,json_extract(employee,'$.reward') as reward FROM zb_stage t
join zb_battle b on(b.id=t.battle_id)
WHERE t.`status` = 4
ORDER BY t.battle_id asc

id	activity_id	battle_id	name	start_time	end_time	employee
1	1	3	启动会阶段	1589429484	1589810400	{"live": 0, "likes": 0, "browse": 80, "coupon": 0, "notify": 0, "reward": 1000, "second": 3, "checkin": 0, "seckill": 0}

 

json_extract('第一个为字段','第二个为json里的path')

REPLACE(json_extract(employee,'$.reward'),'"','')

REPLACE为去除双引号