[英]How Should I Combine These Two SQL queries into one?
嘗試這個,
SELECT column_name(s)
FROM Customer
INNER JOIN Order
ON Customer.CustomerID= Order.Customer_ID AND <conditions>;
內連接只是連接 2 個表的一種方式。 您還可以使用WHERE
閉包連接這兩個表,如下所示,
SELECT column_name(s)
FROM Customer c, Order o
WHERE c.CustomerID = o.Customer_ID AND <condition>
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