Question

对于模糊的标题感到抱歉，但我真的不知道给这个问题的标题：

我有以下结果集：

ID   Field   FieldValue   Culture
1    Color   Groen        nl-NL
2    Taste   Kip          nl-NL
3    Color   Green        en-GB
4    Taste   Chicken      en-GB
5    Color   Green        en
6    Taste   Chicken      en

我想模仿ASP.Net的资源选择方式，用户文化（nl-NL）

SELECT Field, FieldValue FROM Tbl WHERE Culture = 'nl-NL'

或者当特定文化没有结果时，请尝试父文化（nl）

SELECT Field, FieldValue FROM Tbl WHERE Culture = 'nl'

或者当父文化没有结果时，请尝试默认的Culture（en）

SELECT Field, FieldValue FROM Tbl WHERE Culture = 'en'

如何在一个T-SQL语句中组合这些SELECT语句？
我正在使用LINQ，因此LINQ表达式会更大。

OR声明不起作用，因为我不想混合各种文化 ORDER BY语句无济于事，因为它会为每种文化返回多个记录。

输出可能看起来像（nl-NL）：

Color   Groen
Taste   Kip

或（en-GB / en）：

Color   Green
Taste   Chicken

Answer 1

因此，这里的代码完全按照您的示例编写。您可以在客户端代码中确定特定的文化（nl-NL），中性文化（nl）和后备文化（en），并将这些值提供给SQL。

SELECT Field, FieldValue FROM Tbl WHERE Culture = (
    SELECT TOP 1 Culture FROM (
        SELECT 1 as n, Culture FROM Tbl WHERE Culture = 'nl-NL'
        UNION
        SELECT 2, Culture FROM Tbl WHERE Culture = 'nl'
        UNION
        SELECT 3, Culture FROM Tbl WHERE Culture = 'en'
    ) cultures
    ORDER BY n
)

您确定需要针对特定文化的整个翻译表，而不是每个字符串的翻译吗？如果在en中有字符串A和B，但在nl-NL中只有字符串A

，该怎么办？

Answer 2

试试这个：

SELECT Field, FieldValue FROM Tbl WHERE Culture = 'nl-NL' 

union

SELECT Field, FieldValue FROM Tbl WHERE Culture = 'nl' 
and not exists(select * from tbl where culture = 'nl-NL')

union

SELECT Field, FieldValue FROM Tbl WHERE Culture = 'en' 
and not exists(select * from tbl where culture = 'nl-NL')
and not exists(select * from tbl where culture = 'nl')

的LINQ：

var x = (from a in tbl
        where culture == "nl-NL"
        select a
        )

        .Union

        (from a in tbl
        where culture == "nl"
        && !tbl.Any(c => c.Culture == "nl-NL")
        select a
        )

        .Union
        (from a in tbl
        where culture == "en"
        && !tbl.Any(c => c.Culture == "nl-NL")
        && !tbl.Any(c => c.Culture == "nl")
        select a
        );

Answer 3

假设@Culture正在传播文化：

select Field,COALESCE(fc.FieldValue,pc.FieldValue,dc.FieldValue)
from
    Tbl dc
        left join
    Tbl pc
        on
            dc.Field = pc.Field and
            pc.Culture = SUBSTRING(@Culture,1,CHARINDEX('-',@Culture)-1)
        left join
    Tbl fc
        on
            dc.Field = fc.Field and
            fc.Culture = @Culture
where
    dc.Culture = 'en'

将返回整个表格（别名可能更长 - dc =默认文化，pc =部分文化，fc =完整文化。

Answer 4

给定目标文化返回完全匹配，或者失败匹配父项。（假设是文化领域的左2个字符）

（修订版）

-- @TargetCulture represents the culture we are interested in
DECLARE @TargetCulture varchar(5)
SET @TargetCulture = 'nl-NL'

-- Parent represents the Result_Set (as in OP) plus column for the 'parent' culture
;WITH Parent AS
(
    SELECT 
        *, 
        LEFT(Culture, 2) AS parent
    FROM 
        Result_Set
)
SELECT 
    * 
FROM 
    Parent
WHERE
    -- Get either a full matching culture or just a match on the parent
    (@TargetCulture = Culture AND @TargetCulture <> parent)
    OR
    (@TargetCulture <> Culture AND @TargetCulture = parent)

更改@TargetCulture变量的值，以检索nl，en-GB和en的文化数据。

Answer 5

另一种方法;

SELECT * FROM tbl WHERE tbl.Culture = (
 SELECT COALESCE(
  CASE WHEN EXISTS (SELECT 1 FROM tbl WHERE Culture = @locale) THEN @locale ELSE NULL END,
  CASE WHEN EXISTS (SELECT 1 FROM tbl WHERE Culture = SUBSTRING(@locale, 1, CHARINDEX('-', @locale + '-') - 1)) THEN SUBSTRING(@locale, 1, CHARINDEX('-', @locale + '-') - 1) ELSE NULL END,
  'en'
 )
)


nl-nl -> 'nl-nl'
en -> 'en'
en-xxx -> 'en'
zz-gg -> 'en'
en-gb -> 'en-gb'
ff -> 'en'

T-SQL Where语句 - 或者

5 个答案: