现有:
目标:
# 实现方法:
update purchase_goods set goods_name = concat(goods_id, ". ", goods_name)
# update 表名 set 字段1 = concat(字段a , "任意字符串", 字段b)
# 数据还原
update purchase_goods set goods_name = substring_index(goods_name, ' ', -1)where goods_id =1
"""
"""