銷售總成本的15％

Question

難以弄清楚如何計算總銷售額的15％

這是我迄今爲止所得到的（總和）。尋找顯示總銷售額也有15％，在同一個查詢銷售困難..

SELECT SUM(prices) AS total sales FROM sales; 

Answer 1

SELECT SUM(prices) AS [total sales], ((15.0/100.0) * SUM(prices)) AS [15 percent of sales] FROM sales; 

Answer 2

您只需乘以總和0.15：

SELECT SUM(prices) AS total_sales, 
     SUM(prices) * 0.15 AS fifteen_percent 
FROM sales;