SQL Server为此查询创建临时表

Question

我有这个问题：

DECLARE 
@ProjectID int = 3,
@Year int = 2010,
@MeterTypeID int = 1,
@StartDate datetime,
@EndDate datetime

SET @StartDate = '07/01/' + CAST(@Year as VARCHAR)
SET @EndDate = '06/30/' + CAST(@Year+1 as VARCHAR)

SELECT  tblMEP_Sites.Name AS SiteName, convert(varchar(10),BillingMonth ,101) AS BillingMonth, SUM(Consumption) AS Consumption
FROM tblMEP_Projects

JOIN tblMEP_Sites
ON tblMEP_Projects.ID = tblMEP_Sites.ProjectID

JOIN tblMEP_Meters
ON tblMEP_Meters.SiteID = tblMEP_Sites.ID

JOIN tblMEP_MonthlyData
ON tblMEP_MonthlyData.MeterID = tblMEP_Meters.ID

JOIN tblMEP_CustomerAccounts
ON tblMEP_CustomerAccounts.ID = tblMEP_Meters.CustomerAccountID

JOIN tblMEP_UtilityCompanies
ON tblMEP_UtilityCompanies.ID = tblMEP_CustomerAccounts.UtilityCompanyID

JOIN tblMEP_MeterTypes
ON tblMEP_UtilityCompanies.UtilityTypeID = tblMEP_MeterTypes.ID

WHERE tblMEP_Projects.ID = @ProjectID
AND tblMEP_MonthlyData.BillingMonth Between @StartDate AND @EndDate
AND tbLMEP_MeterTypes.ID = @MeterTypeID
GROUP BY BillingMonth, tblMEP_Sites.Name
ORDER BY month(BillingMonth)

我只想将它存储在临时表中，以便我可以用它做点什么。 如果有人可以只包含在SQL Server中创建临时表的语法，那就太好了。

我尝试了不同的方法，但我迷路了，没有得到我想要的结果。

Answer 1

如果您只想在查询中创建一个临时表，允许您对存入其中的结果执行某些操作，则可以执行以下操作：

DECLARE @T1 TABLE (
Item 1 VARCHAR(200)
, Item 2 VARCHAR(200)
, ...
, Item n VARCHAR(500)
)

在查询的顶部，然后执行

INSERT INTO @T1
SELECT
FROM
(...)

Answer 2

像这样。 确保删除临时表（在完成后，在代码块的末尾），否则在后续运行时会出错。

SELECT  
    tblMEP_Sites.Name AS SiteName, 
    convert(varchar(10),BillingMonth ,101) AS BillingMonth, 
    SUM(Consumption) AS Consumption
INTO 
    #MyTempTable
FROM 
    tblMEP_Projects
    JOIN tblMEP_Sites
        ON tblMEP_Projects.ID = tblMEP_Sites.ProjectID
    JOIN tblMEP_Meters
        ON tblMEP_Meters.SiteID = tblMEP_Sites.ID
    JOIN tblMEP_MonthlyData
        ON tblMEP_MonthlyData.MeterID = tblMEP_Meters.ID
    JOIN tblMEP_CustomerAccounts
        ON tblMEP_CustomerAccounts.ID = tblMEP_Meters.CustomerAccountID
    JOIN tblMEP_UtilityCompanies
        ON tblMEP_UtilityCompanies.ID = tblMEP_CustomerAccounts.UtilityCompanyID
    JOIN tblMEP_MeterTypes
        ON tblMEP_UtilityCompanies.UtilityTypeID = tblMEP_MeterTypes.ID
WHERE 
    tblMEP_Projects.ID = @ProjectID
    AND tblMEP_MonthlyData.BillingMonth Between @StartDate AND @EndDate
    AND tbLMEP_MeterTypes.ID = @MeterTypeID
GROUP BY 
    BillingMonth, tblMEP_Sites.Name

DROP TABLE #MyTempTable

Answer 3

如果要查询同一查询中临时表的结果，可以使用#temp tables或@ table变量（我个人更喜欢@），查询要使用的范围之外的## global temp表或创建包含结果的新表。

DECLARE 
@ProjectID int = 3,
@Year int = 2010,
@MeterTypeID int = 1,
@StartDate datetime,
@EndDate datetime

SET @StartDate = '07/01/' + CAST(@Year as VARCHAR)
SET @EndDate = '06/30/' + CAST(@Year+1 as VARCHAR)

DECLARE @MyTempTable TABLE (SiteName varchar(50), BillingMonth varchar(10), Consumption float)

INSERT INTO @MyTempTable (SiteName, BillingMonth, Consumption)
SELECT  tblMEP_Sites.Name AS SiteName, convert(varchar(10),BillingMonth ,101) AS BillingMonth, SUM(Consumption) AS Consumption
FROM tblMEP_Projects

Answer 4

DECLARE #MyTempTable TABLE (SiteName varchar(50), BillingMonth varchar(10), Consumption float)

INSERT INTO #MyTempTable (SiteName, BillingMonth, Consumption)
SELECT  tblMEP_Sites.Name AS SiteName, convert(varchar(10),BillingMonth ,101) AS BillingMonth, SUM(Consumption) AS Consumption
FROM tblMEP_Projects.......  --your joining statements

在这里， # - 使用它在tempdb创建表
@ - 使用它来创建表作为变量。

Answer 5

IF OBJECT_ID('tempdb..#MyTempTable') IS NOT NULL DROP TABLE #MyTempTable

CREATE TABLE #MyTempTable (SiteName varchar(50), BillingMonth varchar(10), Consumption float)

INSERT INTO #MyTempTable (SiteName, BillingMonth, Consumption)
SELECT  tblMEP_Sites.Name AS SiteName, convert(varchar(10),BillingMonth ,101)
AS BillingMonth, SUM(Consumption) AS Consumption
FROM tblMEP_Projects.......