将多行分组为一行，具有一个相似的值

Question

我的mysql表中有3行，例如

company name, tracking type, revenue (columns)
company x, yearly, $100000
company x, monthly, $20000
company x, budget, $30000

我需要将公司名称，年度，月度，预算值显示为单个记录，例如

company x, $100000, $20000, $30000

在这里，我需要将它们与公司名称分组

任何帮助将不胜感激

Answer 1

您可以使用GROUP BY＆amp; CASE

SELECT company name
 , SUM( CASE tracking type WHEN yearly THEN revenue ELSE 0 END)AS yearly
, SUM( CASE tracking type WHEN monthly THEN revenue ELSE 0 END)AS monthly
, SUM( CASE tracking type WHEN budget THEN revenue ELSE 0 END)AS budget
GROUP BY company name