相关疑难解决方法(0)

我用以下代码创建一个视图

SELECT
    CONVERT(NVARCHAR, YEAR(okuma_tarihi)) + 'T1' AS sno,
    YEAR(okuma_tarihi) AS Yillar,
    SUM(toplam_kullanim_T1) AS TotalUsageValue, 'T1' AS UsageType
FROM
    TblSayacOkumalari
GROUP BY
    CONVERT(NVARCHAR, YEAR(okuma_tarihi)) + 'T1', YEAR(okuma_tarihi)

UNION ALL

SELECT
    CONVERT(NVARCHAR, YEAR(okuma_tarihi)) + 'T2' AS sno,
    YEAR(okuma_tarihi) AS Yillar,
    SUM(toplam_kullanim_T2) AS TotalUsageValue, 'T2' AS UsageType
FROM
    TblSayacOkumalari
GROUP BY
    CONVERT(NVARCHAR, YEAR(okuma_tarihi)) + 'T1', YEAR(okuma_tarihi)

UNION ALL

SELECT
    CONVERT(NVARCHAR, YEAR(okuma_tarihi)) + 'T3' AS sno,
    YEAR(okuma_tarihi) AS Yillar,
    SUM(toplam_kullanim_T3) AS TotalUsageValue, 'T3' AS UsageType
FROM
    TblSayacOkumalari
GROUP BY
    CONVERT(NVARCHAR, YEAR(okuma_tarihi)) + 'T1', YEAR(okuma_tarihi) …

我在 SQL Server 数据库中创建了一个视图，它只是两个表的联接。

有什么方法可以将唯一的主键插入到该视图的行中...或者我不确定如何指定其中一个列名作为主键...有什么想法吗？

谢谢