Question

我需要根据WHERE子句的结果为SELECT子句添加一个连接字段。这是我目前的查询：

Declare
@Low numeric(13,0) = 10000,
@High numeric(13,0) = 100000000000,
@Name varchar(100) = '%',
@Stname varchar(100) = '%georgia',
@Sumlev varchar(3) = 1,
@County varchar(30) = 123456,
@Place varchar (5) = 8,
@Gid2 varchar(5),
@Gid2_1 varchar (7);

if object_id('tempdb..#GeoID2') is not null drop table #GeoID2

SELECT
    SUMLEV, State, County, Place, Name, Stname, ESTIMATESBASE2010, CONCAT(REPLICATE('0', 2 - LEN(STATE)) + STATE, REPLICATE('0', 3 - LEN(COUNTY)) + COUNTY) AS Gid2
INTO
    #GeoID2
FROM
    [CensusData].[dbo].[SUB-EST2014_ALL]
WHERE
    (NOT (SUMLEV = @Sumlev)) AND (NOT (County = @County)) AND (NOT (PLACE = @Place)) AND 
              (ESTIMATESBASE2010 > @Low) AND (ESTIMATESBASE2010 < @High) AND (Name LIKE @Name) and (Stname LIKE @Stname)

SELECT
    [#GeoID2].SUMLEV, [#GeoID2].State, [#GeoID2].County, [#GeoID2].Place, [#GeoID2].Stname, [#GeoID2].Name, [#GeoID2].ESTIMATESBASE2010, [ACS_14_5YR_S1901_with_ann].[HC01_EST_VC13] as Avg_Salary, [#GeoID2].Gid2, [#GeoID2].Gid21
FROM
    [CensusData].[dbo].[#GeoID2] INNER JOIN
    [CensusData].[dbo].[ACS_14_5YR_S1901_with_ann] ON [CensusData].[dbo].[#GeoID2].Gid2 = [CensusData].[dbo].[ACS_14_5YR_S1901_with_ann].[GEO id2]
ORDER BY
    [#GeoID2].NAME

我需要在我的第一个SELECT子句中添加一个CASE语句，为Gid2赋值。当前值分配为：

CONCAT(REPLICATE('0', 2 - LEN(STATE)) + STATE, REPLICATE('0', 3 - LEN(COUNTY)) + COUNTY) AS Gid2

我需要做的是在分配此值之前检查[County]的值。根据该结果，我将使用两个公式之一。这是我尝试过的（不起作用）：

Case
    When (County = 0)
    Then 'CONCAT(REPLICATE('0', 2 - LEN(STATE)) + STATE, REPLICATE('0', 5 - LEN(PLACE)) + PLACE) AS Gid2'
    Else 'CONCAT(REPLICATE('0', 2 - LEN(STATE)) + STATE, REPLICATE('0', 3 - LEN(COUNTY)) + COUNTY) AS Gid2'
End

我不确定使用CASE是正确的方法，但我无法找出任何其他方法来解决这个问题。有人可以帮忙吗？

Answer 1

好的我明白了。我正在使用＆＃39;当我应该使用时，在我的Concat功能面前（。这是一个有效的查询：

Declare
@Low numeric(13,0) = 10000,
@High numeric(13,0) = 100000000000,
@Name varchar(100) = '%',
@Stname varchar(100) = '%georgia',
@Sumlev varchar(3) = 1,
@County varchar(30) = 123456,
@Place varchar (5) = 8,
@Gid2 varchar(5),
@Gid2_1 varchar (7);

if object_id('tempdb..#GeoID2') is not null drop table #GeoID2

SELECT
SUMLEV, State, County, Place, Name, Stname, ESTIMATESBASE2010,

Case
    When (County = 0)
    Then (CONCAT(REPLICATE('0', 2 - LEN(STATE)) + STATE, REPLICATE('0', 5 - LEN(PLACE)) + PLACE))
    Else (CONCAT(REPLICATE('0', 2 - LEN(STATE)) + STATE, REPLICATE('0', 3 - LEN(COUNTY)) + COUNTY))
End AS Gid2

 INTO
    #GeoID2

FROM
    [CensusData].[dbo].[SUB-EST2014_ALL]

WHERE
    (NOT (SUMLEV = @Sumlev)) AND (NOT (County = @County)) AND (NOT (PLACE = @Place)) AND 
              (ESTIMATESBASE2010 > @Low) AND (ESTIMATESBASE2010 < @High) AND (Name LIKE @Name) and (Stname LIKE @Stname)

SELECT
    [#GeoID2].SUMLEV, [#GeoID2].State, [#GeoID2].County, [#GeoID2].Place, [#GeoID2].Stname, [#GeoID2].Name, [#GeoID2].ESTIMATESBASE2010, [ACS_14_5YR_S1901_with_ann].[HC01_EST_VC13] as Avg_Salary, [#GeoID2].Gid2

FROM
    [CensusData].[dbo].[#GeoID2] INNER JOIN
    [CensusData].[dbo].[ACS_14_5YR_S1901_with_ann] ON [CensusData].[dbo].[#GeoID2].Gid2 = [CensusData].[dbo].[ACS_14_5YR_S1901_with_ann].[GEO id2]

ORDER BY
    [#GeoID2].NAME

SELECT子句

1 个答案: