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我有mysql列:mysql |具體要求
[{"name":"Color","value":"Red (+5$)","price":"+5"}] // options column
,並要求:
SELECT C.options, C.qty, P.PRICE
FROM `cart` C
LEFT JOIN `products` P ON C.productid = P.id
WHERE C.userid = '3c9494e7ff22e2a7ac01a3e95fbbc0e4'
但我需要這樣的:
SELECT C.options, C.qty, (P.PRICE + (substract price +5 from options column))*C.qty
FROM `cart` C
LEFT JOIN `products` P ON C.productid = P.id
WHERE C.userid = '3c9494e7ff22e2a7ac01a3e95fbbc0e4'
是否有可能獲得上述要求? 謝謝。
爲什麼?爲什麼要在DBMS中解析或使用JSON做些事情?如果這是您的應用程序的意圖 - 然後將數據存儲在單獨的列 –