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MSSQL2000 Column alias problem
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#18+
Делаю запрос в "стандартной" базе: Use Northwind go SELECT OrderID, DATEDIFF(dd, ShippedDate, GETDATE() ) AS DaysSinceShipped FROM Northwind.dbo.Orders WHERE DaysSinceShipped = 2002 Говорит: Invalid column name 'DaysSinceShipped' Почему???? Ведь order by DaysSinceShipped проходит на ура! ... |
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| 09.01.2002, 15:49 |
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MSSQL2000 Column alias problem
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#18+
BOL "column_alias can be used in an ORDER BY clause. However, it cannot be used in a WHERE, GROUP BY, or HAVING clause." Нужно так SELECT * FROM (SELECT OrderID,DATEDIFF(dd, ShippedDate, GETDATE() ) AS DaysSinceShipped FROM Northwind.dbo.Orders) AS a WHERE DaysSinceShipped = 2002 ... |
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| 09.01.2002, 15:57 |
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