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外连接查询

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GuanM 2024-11-19 15:17:11 +08:00
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commit 1983d42713
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数据库/头歌/外连接查询/外连接查询.sh Normal file
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USE Mall
GO
SET NOCOUNT ON
--********** 左连接 **********--
--********** Begin **********--
SELECT p.prod_id, p.prod_name, p.prod_price, p.vend_id,
v.vend_id, v.vend_name, v.vend_phone
FROM Products p LEFT JOIN Vendors v
ON p.vend_id = v.vend_id;
--********** End **********--
--********** 右连接 **********--
--********** Begin **********--
SELECT p.prod_id, p.prod_name, p.prod_price, p.vend_id,
v.vend_id, v.vend_name, v.vend_phone
FROM Products p RIGHT JOIN Vendors v
ON p.vend_id = v.vend_id;
--********** End **********--
GO