<cfoutput> MySQL SUM 函数

Question

我了解 SQL sum 函数。这是我的代码：

<cfquery name="sum" datasource="expense_db" username = "for" password = "bar">
  SELECT sum(amount) 
  FROM expense
</cfquery> 

如何输出查询结果？我只想输出金额列的 SUM

Answer 1

您可以使用列的别名并在 Coldfusion 代码中使用该列名称。

https://www.w3schools.com/sql/sql_alias.asp

<cfquery name="sum" datasource="expense_db" username = "for" password = "bar">
  SELECT sum(amount) AS Total 
  FROM expense
</cfquery> 

<cfoutput>#sum.Total#</cfoutput><!--- query_name.column_name --->