从SQL中选择

Question

我有一张表,其中包含一个国家的名称,该国的人口和国家的GDP,我如何显示该国的名称及其人均GDP

Answer 1

SELECT name, gdp/NullIf(population,0) AS PerCapitaGDP FROM "MyCountryTable"

Answer 2

SQL允许计算内联,如:

SELECT Name, GDP / Population AS [Per Capita GDP] FROM YourTable