数据库表(T1)中有个字段(pinfos)是这样保存数据的:[{"subject":"1111222222","postids":"1,3,6,7,9","successdate":"2019-03-04"},{"subject":"3333","postids":"3,9,12","successdate":"2019-03-24"},{"subject":"3333","postids":"1,7","successdate":"2019-04-07"},{"subject":"3333","postids":"1,2,5","successdate":"2019-05-04"}]字段类型为:text这个只是一条记录中的这个字段里的内容,这个表有N条记录。需求:想在这个表中,把这个(pinfos)字段中所有successdate小于2019-06-01的的记录,全部找出来。
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