mysql - SELECT 语句 - 添加另一个派生字段

Question

我有一个有 3 列的表。Name, DateOfBirth, DateDeceded. 字段DateOfBirth和DateDeceded具有数据类型DATE。

现在当我做一个Select * from TableName. 我想显示姓名、出生日期、过世日期和该人居住的年数（DateDeceded- DateOfBirth）。

如何编写 SQL Select 语句以包含该NumberOfYearsLived字段？

score 4 · Accepted Answer

尝试：

SELECT Name,
       DateOfBirth,
       DateDeceded,
       YEAR(DateDeceded) - YEAR(DateOfBirth) AS NumberOfYearsLived
  FROM TableName

编辑：你可能想试试这个。可能更准确。

SELECT Name,
       DateOfBirth,
       DateDeceded,
       TIMESTAMPDIFF(YEAR, DateDeceded, DateofBirth) AS NumberOfYearsLived
  FROM TableName

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