MYSQL直接在SQL提取json字符串中的内容-----将13位时间戳转换成标准的日期格式【记录SQL常用函数】字段内容如下所示: [{ "tax": { "taxName": "Tax1", "taxAmount": { "amount": 0, "currency": "USD" } }, "chargeName": "ItemPrice", "chargeType": "PRODUCT", "chargeAmount": { "amount": 499.99, "currency": "USD" } }]