Question

我在报告查询中使用以下SQL，我必须列出给定时间范围内的所有生日和纪念日。有没有更好的方法来避免UNION和SELECT - DISTINCT？我已将此更改为使用UNION ALL，因为数据已经是不同的。

请注意，我们可以在同一时间段内举行纪念日和生日。

SELECT  
    gpms.[birthdate]          AS [Date],
    'Birthday'                AS [Event], 
    gpms.[name]               AS [Name], 
    gpms.[email]              AS [Email],     
    gpms.[address]            AS [Address],   
FROM PERSONDETAILS gpms
JOIN @selectedpersons sgf ON sgf.[account] = gpms.[account]
WHERE DATEADD(year,DATEDIFF(YEAR, birthdate, @p_StartDate),birthdate) BETWEEN @p_StartDate AND @p_endDate
   OR DATEADD(year,DATEDIFF(YEAR, birthdate, @p_endDate  ),birthdate) BETWEEN @p_StartDate AND @p_endDate
UNION 
SELECT 
    gpms.[birthdate]          AS [Date],
    'Birthday'                AS [Event], 
    gpms.[name]               AS [Name], 
    gpms.[email]              AS [Email],     
    gpms.[address]            AS [Address],   
FROM PERSONDETAILS gpms
JOIN @selectedpersons sgf ON sgf.[account] = gpms.[account] 
WHERE DATEADD(year,DATEDIFF(YEAR, Anniversary, @p_StartDate),Anniversary) BETWEEN @p_StartDate AND @p_endDate
   OR DATEADD(year,DATEDIFF(YEAR, Anniversary, @p_endDate  ),Anniversary) BETWEEN @p_StartDate AND @p_endDate

Answer 1

试试这个：

SELECT
gpms.[birthdate]          AS [Date],
'Birthday'                AS [Event], 
gpms.[name]               AS [Name], 
gpms.[email]              AS [Email],     
gpms.[address]            AS [Address],   
FROM PERSONDETAILS gpms
JOIN @selectedpersons sgf  ON sgf.[account] = gpms.[account]    
WHERE DATEADD(year,DATEDIFF(YEAR, birthdate, @p_StartDate),birthdate) BETWEEN @p_StartDate AND @p_endDate
OR DATEADD(year,DATEDIFF(YEAR, birthdate, @p_endDate),birthdate) BETWEEN @p_StartDate AND @p_endDate
OR DATEADD(year,DATEDIFF(YEAR, Anniversary, @p_StartDate),Anniversary) BETWEEN @p_StartDate AND @p_endDate
OR DATEADD(year,DATEDIFF(YEAR, Anniversary, @p_endDate),Anniversary) BETWEEN @p_StartDate AND @p_endDate

在select查询中避免使用UNION

1 个答案: