Question

我无法将以下内容转换为带有子查询的sql语句：

SELECT 
    "AM-Martin".dbo.CpCore_Site.Number
    , "AM-Martin".dbo.CpCore_Site.Latitude
    , "AM-Martin".dbo.CpCore_Site.Longitude
    , "AM-Martin".dbo.CpSm_Face.RetiredOn
    , "AM-Martin_bin".dbo.CpCore_Image.Bytes
    , "AM-Martin".dbo.CpCore_Site.Name
    , "AM-Martin".dbo.CpCore_Site.Zipcode
FROM
    "AM-Martin".dbo.CpCore_Site
    INNER JOIN "AM-Martin".dbo.CpSm_Face on "AM-Martin".dbo.CpSm_Face.SiteId = "AM-Martin".dbo.CpCore_Site.Oid
WHERE
    "AM-Martin".dbo.CpSm_Face.RetiredOn LIKE '%9999%'
     AND "AM-Martin".dbo.CpCore_Site.Number LIKE N'%LA%' OR "AM-Martin".dbo.CpCore_Site.Number LIKE N'%LC%' OR "AM-Martin".dbo.CpCore_Site.Number LIKE N'%BH%'
     AND "AM-Martin".dbo.CpCore_Site.Latitude > 0.0
GROUP BY 
    "AM-Martin".dbo.CpCore_Site.Number
    , "AM-Martin".dbo.CpCore_Site.Latitude
    , "AM-Martin".dbo.CpCore_Site.Longitude
    , "AM-Martin".dbo.CpSm_Face.RetiredOn
    , "AM-Martin_bin".dbo.CpCore_Image.Bytes
    , "AM-Martin".dbo.CpCore_Site.Name
    , "AM-Martin".dbo.CpCore_Site.Zipcode;

图像数据类型给了我关于尝试使用GROUP BY的问题我得到的错误是：

错误：无法比较text，ntext和image数据类型排序，除非使用IS NULL或LIKE运算符。错误代码：306

我找到了一个解决方案，请参阅我之前的问题SQL Query to delete duplicate values in a 3 tables inner join with two different databases，但我的图片存在转换问题。

我的目标是编写一个子查询来获取主sql语句之外的图像，然后加入图像。到目前为止，这就是我所拥有的：

SELECT 
    "AM-Martin_bin".dbo.CpCore_Image.Bytes
    FROM
    (
SELECT 
    "AM-Martin".dbo.CpCore_Site.Number
    , "AM-Martin".dbo.CpCore_Site.Latitude
    , "AM-Martin".dbo.CpCore_Site.Longitude
    , "AM-Martin".dbo.CpSm_Face.RetiredOn
    , "AM-Martin".dbo.CpCore_Site.Name
    , "AM-Martin".dbo.CpCore_Site.Zipcode
FROM
    "AM-Martin".dbo.CpCore_Site
    INNER JOIN "AM-Martin".dbo.CpSm_Face on "AM-Martin".dbo.CpSm_Face.SiteId = "AM-Martin".dbo.CpCore_Site.Oid
WHERE
    "AM-Martin".dbo.CpSm_Face.RetiredOn LIKE '%9999%'
     AND "AM-Martin".dbo.CpCore_Site.Number LIKE N'%LA%' OR "AM-Martin".dbo.CpCore_Site.Number LIKE N'%LC%' OR "AM-Martin".dbo.CpCore_Site.Number LIKE N'%BH%'
     AND "AM-Martin".dbo.CpCore_Site.Latitude > 0.0
GROUP BY 
    "AM-Martin".dbo.CpCore_Site.Number
    , "AM-Martin".dbo.CpCore_Site.Latitude
    , "AM-Martin".dbo.CpCore_Site.Longitude
    , "AM-Martin".dbo.CpSm_Face.RetiredOn
    , "AM-Martin".dbo.CpCore_Site.Name
    , "AM-Martin".dbo.CpCore_Site.Zipcode
) AS a
INNER JOIN "AM-Martin_bin".dbo.CpCore_Image on "AM-Martin".dbo.CpSm_Face.Oid = "AM-Martin_bin".dbo.CpCore_Image.OwnerId;

运行此查询时出现的错误是：

错误：多部分标识符＆＃34; AM-Martin.dbo.CpSm_Face.Oid＆＃34;可以不受约束。错误代码：4104

任何帮助实现这一目标的人都将不胜感激。

Answer 1

编辑：添加

中的所有列

我似乎无法再编辑我的评论，但这应该可以解决第二个问题：

SELECT 
    a.*
    , "AM-Martin_bin".dbo.CpCore_Image.Bytes
FROM
    (
SELECT DISTINCT
    "AM-Martin".dbo.CpCore_Site.Number
    , "AM-Martin".dbo.CpCore_Site.Latitude
    , "AM-Martin".dbo.CpCore_Site.Longitude
    , "AM-Martin".dbo.CpSm_Face.RetiredOn
    , "AM-Martin".dbo.CpCore_Site.Name
    , "AM-Martin".dbo.CpCore_Site.Zipcode
    , "AM-Martin".dbo.CpSm_Face.Oid
FROM
    "AM-Martin".dbo.CpCore_Site
    INNER JOIN "AM-Martin".dbo.CpSm_Face on "AM-Martin".dbo.CpSm_Face.SiteId = "AM-Martin".dbo.CpCore_Site.Oid
WHERE
    "AM-Martin".dbo.CpSm_Face.RetiredOn LIKE '%9999%'
     AND "AM-Martin".dbo.CpCore_Site.Number LIKE N'%LA%' OR "AM-Martin".dbo.CpCore_Site.Number LIKE N'%LC%' OR "AM-Martin".dbo.CpCore_Site.Number LIKE N'%BH%'
     AND "AM-Martin".dbo.CpCore_Site.Latitude > 0.0
) AS a
INNER JOIN "AM-Martin_bin".dbo.CpCore_Image on a.Oid = "AM-Martin_bin".dbo.CpCore_Image.OwnerId;

注意我从内部查询中删除了GROUP BY，而是添加了DISTINCT以消除可能的重复项。但是，我无法测试这是否有效，因为我不知道您的数据。

为了便于阅读，我建议您为表格添加别名，而不是在任何地方重复"AM-MARTIN".dbo.<tablename>部分（最初会让我失去关于找到合适的列等等）。

示例：

SELECT 
    a.*
    , b.Bytes
FROM
    (
SELECT DISTINCT
    a_inner.Number
    , a_inner.Latitude
    , a_inner.Longitude
    , b_inner.RetiredOn
    , "a_inner.Name
    , a_inner.Zipcode
    , b_inner.Oid
FROM
    "AM-Martin".dbo.CpCore_Site a_inner
    INNER JOIN "AM-Martin".dbo.CpSm_Face b_inner on b_inner.SiteId = a_inner.Oid
WHERE
    b_inner.RetiredOn LIKE '%9999%'
     AND b_inner.Number LIKE N'%LA%' OR b_inner.Number LIKE N'%LC%' OR b_inner.Number LIKE N'%BH%'
     AND b_inner.Latitude > 0.0
) AS a
INNER JOIN "AM-Martin_bin".dbo.CpCore_Image b on a.Oid = b.OwnerId;

请注意，我为子查询使用了a_inner和b_inner别名。但是，您也可以使用a和b。我真的很想确保你看到差异，而不是想知道列的来源。

将SQL查询拆分为嵌套查询（子查询）

1 个答案: