mysql存在则更新，不存在就插入

存在就更新的sql语句

# 需要先创建唯一索引或者唯一主键
replace into labels.label_last_new(StockId,StockName,LabelName,EnabledStatus,OccurrenceDate)
select StockId,StockName,LabelName,EnabledStatus,max(OccurrenceDate) from labels.t_stocklabel2022 as t2 group by StockId