按物质引用命令？

Question

我正在使用mysql,以下两个sqls产生不同的结果.

SELECT developers.* FROM "developers" ORDER BY id DESC LIMIT 1
SELECT developers.* FROM "developers" ORDER BY 'id DESC' LIMIT 1

我认为引用顺序无关紧要.

Answer 1

引用你用文字字符串'id DESC'命令的顺序,这确实会改变结果,因为它没有任何意义 - 与说ORDER BY 1差别不大