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並前往https://learn.microsoft.com/zh-tw/sql/t-sql/functions/count-transact-sql?view=sql-server-ver16

COUNT (Transact-SQL) - SQL Server

USE ssawPDW; SELECT COUNT(EmployeeKey) AS TotalCount, AVG(SalesAmountQuota) AS [Average Sales Quota] FROM dbo.FactSalesQuota WHERE ...

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