不唯一的表/别名SQL

Question

ResultSet resultSet = statement.executeQuery("SELECT people.occupation_code,people.country_of_birth,"
                + " countries.currency_name, countries.telephone_code "
                + "FROM people,countries"
                + "WHERE people.country_of_birth = countries.name ");

我目前正在使用MySQL数据库，当我编译程序时，我有：不唯一的表/别名：'people'。 查看以前与此相关的问题，发现通常在您加入两个表时出现。但我没有。

Answer 1

FROM people,countries"
+ "WHERE people.country_of_birth = countries.name ");

你需要一个国家之后的空间。

FROM people,countries "
+ "WHERE people.country_of_birth = countries.name ");