Question

我正在制作一个rdl报告，我有三个复选框，如果选中则需要更改我的WHERE语句。如果未选中，则结果应仅按日期范围匹配。如果选中了一个或多个，则需要返回与对应字符串变量匹配的字段。

WHERE 
(EffectiveDate BETWEEN @StartDate AND @EndDate) 
AND (((@IncludeSEWPrefix = 1 AND PrefixId = 'SEW') OR @IncludeSEWPrefix = 0)
AND ((@IncludePAWPrefix = 1 AND PrefixId = 'PAW') OR @IncludePAWPrefix = 0)
AND ((@IncludeRPLPrefix = 1 AND PrefixId = 'RPL') OR @IncludeRPLPrefix = 0))

到目前为止，我的代码在没有选中的情况下以及选中的代码时都有效，但在选中多个复选框时则不返回任何内容。因此，为了尝试修复此问题，我将代码更改为此

WHERE 
(EffectiveDate BETWEEN @StartDate AND @EndDate) 
AND ((((@IncludeSEWPrefix = 1 AND PrefixId = 'SEW') OR @IncludeSEWPrefix = 0)
OR ((@IncludePAWPrefix = 1 AND PrefixId = 'PAW') OR @IncludePAWPrefix = 0)
OR ((@IncludeRPLPrefix = 1 AND PrefixId = 'RPL') OR @IncludeRPLPrefix = 0)))

无论选择什么行，都导致返回所有行。谁能告诉我哪里出错了？

Answer 1

我相信这是正确的重新排列。比第一次出现更棘手的问题。问题是((@IncludeSEWPrefix = 1 AND PrefixId = 'SEW') OR @IncludeSEWPrefix = 0)与AND之间的分隔意味着如果两个包含为true，则一行需要同时包含PrefixId，这是不可能发生的。如果你用OR分隔它们，那么只有一个包含false，意味着每一行都会通过。因此，请检查一行是否包含任何包含的前缀，否则所有包含都必须关闭。

WHERE EffectiveDate BETWEEN @StartDate AND @EndDate
AND 
(
    (@IncludeSEWPrefix = 1 AND PrefixId = 'SEW') OR
    (@IncludePAWPrefix = 1 AND PrefixId = 'PAW') OR 
    (@IncludeRPLPrefix = 1 AND PrefixId = 'RPL') OR
    (@IncludeSEWPrefix = 0 AND @IncludePAWPrefix = 0 AND @IncludeRPLPrefix = 0)
)

Answer 2

试试这个

WHERE  
(EffectiveDate BETWEEN @StartDate AND @EndDate)  
AND 
(
(@IncludeSEWPrefix = 1 AND PrefixId = 'SEW' OR @IncludeSEWPrefix = 0) AND 
(@IncludePAWPrefix = 1 AND PrefixId = 'PAW' OR @IncludePAWPrefix = 0) AND 
(@IncludeRPLPrefix = 1 AND PrefixId = 'RPL' OR @IncludeRPLPrefix = 0)
)

Answer 3

你有比所需更多的括号，它不会伤害但只是要注意。也许这可以提供帮助：

WHERE (EffectiveDate BETWEEN @StartDate AND @EndDate) 
    AND (   ((@IncludeSEWPrefix = 1 AND PrefixId = 'SEW') OR (@IncludeSEWPrefix = 0 AND @PrefixId <> 'SEW'))
        OR ((@IncludePAWPrefix = 1 AND PrefixId = 'PAW') OR (@IncludePAWPrefix = 0 AND @PrefixId <> 'PAW'))
        OR ((@IncludeRPLPrefix = 1 AND PrefixId = 'RPL') OR (@IncludeRPLPrefix = 0 AND @PrefixId <> 'RPL'))
        )

Where语句中的SQL Boolean Vars

3 个答案: