Question

我正在为初始页面加载创建存储过程，因此有两个不同的查询和结果集。

第一个查询在第二个查询中完全重复为嵌套SELECT。

我的问题是，是将第一个查询的结果放入表格var还是只是在第二个查询中复制代码/查询？

提前致谢。

--Get Most Popular Sports for each country
    SELECT
        dbo.Countries2Sports.rank,
        dbo.Countries2Sports.SportName,
        dbo.Countries2Sports.imageURL,
        dbo.Countries2Sports.imageALTtext
    FROM
        dbo.Countries2Sports
    WHERE
        dbo.Countries2Sports.CountryCode = @CountryCode
    ORDER BY
        dbo.Countries2Sports.rank ASC

    --Get Organizations related to each country's sports
    SELECT
        dbo.Countries2Organizations.ID,
        dbo.Countries2Organizations.OrganizationCode,
        dbo.Countries2Organizations.OrganizationName,
        dbo.Countries2Organizations.LogoURL,
        dbo.Countries2Organizations.Sport
    FROM
        dbo.Countries2Organizations
    WHERE
        dbo.Countries2Organizations.Sport IN 
            (
                SELECT
                    dbo.Countries2Sports.SportName
                FROM
                    dbo.Countries2Sports
                WHERE
                    dbo.Countries2Sports.CountryCode = @CountryCode
            )
      AND (dbo.Countries2Organizations.CountryCode = @CountryCode OR 
           dbo.Countries2Organizations.CountryCode = '')

Answer 1

如果您不想在输出中使用结果集，那么您可以使用CTE，如果记录数量低，则可以比临时表更好：

;WITH CTE AS (
    SELECT
        dbo.Countries2Sports.rank,
        dbo.Countries2Sports.SportName,
        dbo.Countries2Sports.imageURL,
        dbo.Countries2Sports.imageALTtext

    FROM
        dbo.Countries2Sports
    WHERE
        dbo.Countries2Sports.CountryCode = @CountryCode
    --ORDER BY
    --    dbo.Countries2Sports.rank ASC
)
--Get Organizations related to each country's sports
SELECT
    dbo.Countries2Organizations.ID,
    dbo.Countries2Organizations.OrganizationCode,
    dbo.Countries2Organizations.OrganizationName,
    dbo.Countries2Organizations.LogoURL,
    dbo.Countries2Organizations.Sport
FROM
    dbo.Countries2Organizations
WHERE
    dbo.Countries2Organizations.Sport IN 
        (
            SELECT
                dbo.Countries2Sports.SportName
            FROM
                CTE
        )
AND (   dbo.Countries2Organizations.CountryCode = @CountryCode  OR dbo.Countries2Organizations.CountryCode = '')

SQL Azure存储过程多个结果集

1 个答案: