Sql查询返回SUM和匹配查询的行数

Question

表UserData（UserID，Sales，Credits）

我需要返回销售额，信用额和给定日期范围内返回的行数。

1次查询是否可以？

Answer 1

SELECT COUNT(*), SUM(Sales), SUM(Credits)
FROM UserData
WHERE TransactionDate BETWEEN @StartDate AND @EndDate

Answer 2

您还可以为此计算列提供名称

   SELECT 
      COUNT(*) AS NumRows, SUM(Sales) AS SalesTotal, SUM(Credits) AS CreditsTotal
   FROM UserData
   WHERE TransactionDate BETWEEN @StartDate AND @EndDate