SQL SERVER2000教程-第五章 处理数据 第十七节 使用CASE函数格式进行条件查询

USE pubs
SELECT
   CASE type
      WHEN 'popular_comp' THEN 'Popular Computing'
      WHEN 'mod_cook' THEN 'Modern Cooking'
      WHEN 'business' THEN 'Business'
      WHEN 'psychology' THEN 'Psychology'
      WHEN 'trad_cook' THEN 'Traditional Cooking'
      ELSE 'Not yet categorized'
   END AS Category,
CONVERT(varchar(30), title) AS "Shortened Title",
price AS Price
FROM titles
WHERE price IS NOT NULL
ORDER BY 1