如何使用参加sql以检索的列从多个表

代码示例

加入多个表sql

SELECT TableA.*, TableB.*, TableC.*, TableD.*
FROM TableA
    JOIN TableB
        ON TableB.aID = TableA.aID
    JOIN TableC
        ON TableC.cID = TableB.cID
    JOIN TableD
        ON TableD.dID = TableA.dID
WHERE DATE(TableC.date)=date(now())

加入多个表

SELECT o.orderid, o.amount, i.description
2FROM orders o
3INNER JOIN items i
4ON o.itemid = i.itemid

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