Mysql JSON_UNQUOTE()、JSON_EXTRACT() 函数使用

一、简介

JSON_EXTRACT() : Mysql 根据 Json 中指定的 key 取出对应的 value

JSON_UNQUOTE() : 取消引用 Json 值,返回字符串,如果参数为 null,则返回 null 值

二、使用案例

1、表结构 (F_transaction_data 字段类型为 JSON)

2、查询 SQL 

SELECT
  t1.F_merchant_id AS merchantId,
  t1.F_transaction_data,
  IFNULL(JSON_UNQUOTE(json_extract(t1.F_transaction_data, '$.t0')), 0) settleType,
  JSON_UNQUOTE(json_extract(t1.F_transaction_data, '$.source_type')) AS sourceType,
  JSON_UNQUOTE(json_extract(t1.F_transaction_data, '$.order_amount')) AS orderAmount,
  JSON_UNQUOTE(json_extract(t1.F_transaction_data, '$.channel_order_id')) AS channelOrderId
FROM
   lepay3.t_operation_info_10 t1
WHERE 
	t1.F_merchant_id = '4811013310'
   AND F_trade_type = 1
   AND F_operation_type = 2;

3、查询结果

4、F_transaction_data  的值