SQL Server需要一列和所有其他记录的前1条记录

Question

我需要有一个查询来选择KitchenBlinkSound='Y'加top 1 KitchenBlinkSound='N'的所有记录，这是我的表结构。

我要求的结果将是OrderNo 225,226,227。基本上它包含所有KitchenBlinkSound='Y'条记录以及top 1条记录的KitchenBlinkSound='N'。

Answer 1

SELECT * FROM TABLE WHERE KitchenBlinkSound='Y'
UNION ALL 
SELECT TOP 1 *  FROM TABLE WHERE KitchenBlinkSound='N'
ORDER BY ORDERNO

<强>更新

SELECT TOP 3 * FROM
(
    SELECT * FROM #TABLE1 WHERE KitchenBlinkSound='Y'
    UNION ALL 
    SELECT ORDERNO,KITCHENSTATUS,KitchenBlinkSound FROM
    (
        SELECT *,
        ROW_NUMBER() OVER(PARTITION BY KitchenBlinkSound ORDER BY ORDERNO ASC) RNO 
        FROM #TABLE1 WHERE KitchenBlinkSound='N'
    )TAB
    WHERE TAB.RNO=1
)MAIN

• 由于子查询不允许ORDER BY，因此会添加ROW_NUMBER（），以确保您按升序选择TOP 1 ORDERNO。如果您想按降序将ASC更改为DESC。

Answer 2

Select * from [your table name] where KitchenBlickSound = 'Y'
UNION
Select TOP 1 * from [your table name] where KitchenBlickSound = 'N'