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以下是过程。我一直在获取SQL必须声明标量变量“@sql”,即使我已将@startdate转换为varchar。我错过了什么?SQL必须声明标量变量
CREATE PROCEDURE [dbo].[project_revenue_forecast_monthly]
@startDate datetime,
@sql varchar(max)
AS
SET @sql = 'SELECT CLIENTNAME, PROJECTNAME, PROJECTSD,
isnull([' + REPLACE(SUBSTRING(CONVERT(varchar, @startDate, 13), 4, 8), ' ', '') + '],0) as
[' + REPLACE(SUBSTRING(CONVERT(varchar, @startDate, 13), 4, 8), ' ', '') + '],
isnull([' + REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 1, @startDate), 13), 4, 8), ' ', '') + '],0) as
[' + REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 1, @startDate), 13), 4, 8), ' ', '') + '],
isnull([' + REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 2, @startDate), 13), 4, 8), ' ', '') + '],0) as
[' + REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 2, @startDate), 13), 4, 8), ' ', '') + '],
isnull([' + REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 3, @startDate), 13), 4, 8), ' ', '') + '],0) as
[' + REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 3, @startDate), 13), 4, 8), ' ', '') + '],
isnull([' + REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 4, @startDate), 13), 4, 8), ' ', '') + '],0) as
[' + REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 4, @startDate), 13), 4, 8), ' ', '') + '],
isnull([' + REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 5, @startDate), 13), 4, 8), ' ', '') + '],0) as
[' + REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 5, @startDate), 13), 4, 8), ' ', '') + '],
FORECASTTIMEDAYS, BILLINGRATEDAILY
FROM
(
SELECT
CLIENTNAME, PROJECTNAME, PROJECTS, SCHENTRYDATE, FORECASTTOTAL
FROM viewprojscheduling_group
) AS SourceTable
PIVOT
(
SUM(FORECASTTOTAL)
FOR SCHENTRYDATE IN (' +
QUOTENAME(REPLACE(SUBSTRING(CONVERT(varchar, @startDate, 13), 4, 8), ' ', '')) + ', ' +
QUOTENAME(REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 1, @startDate), 13), 4, 8), ' ', '')) + ', ' +
QUOTENAME(REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 2, @startDate), 13), 4, 8), ' ', '')) + ', ' +
QUOTENAME(REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 3, @startDate), 13), 4, 8), ' ', '')) + ', ' +
QUOTENAME(REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 4, @startDate), 13), 4, 8), ' ', '')) + ', ' +
QUOTENAME(REPLACE(SUBSTRING(CONVERT(varchar, DATEADD(MONTH, 5, @startDate), 13), 4, 8), ' ', '')) + ')
) AS PivotTable'
execute(@sql)
推荐阅读:http://sqlblog.com/blogs/aaron_bertrand/archive/2009/10/09/bad-habits-to-kick-declaring-varchar-without-length.aspx和http:/ /sqlblog.com/blogs/aaron_bertrand/archive/2011/09/17/bad-habits-to-kick-using-exec-instead-of-sp-executesql.aspx – 2013-03-08 12:42:46