PostgreSQL中的BETWEEN/IN错误[重复]

Question

我在理解为什么 PostgreSQL 给我 SQL 错误时遇到了一些麻烦：

ERROR:  operator does not exist: character varying = integer
LINE 4: WHERE public.prospect.rating IN (1,2);
                                 ^
HINT:  No operator matches the given name and argument type(s). You 
might need to add explicit type casts.
SQL state: 42883
Character: 279

这是我正在使用的代码行：

SELECT public.people.organization, public.people.firstname, 
public.people.lastname, 
public.people.linkedinurl, public.people.orgcrunchbaseurl
FROM public.prospect LEFT JOIN public.people ON 
public.prospect.organization = public.people.organization
WHERE public.prospect.rating BETWEEN 1 and 2;

我遇到的问题在最后一行。我也试过：

WHERE public.prospect.rating IN (1,2);

我正在尝试将搜索范围缩小到只有 1 或 2 评级的项目。

提前感谢您的帮助！

Answer 1

使用表别名时会发生什么？

SELECT p.organization, p.firstname, p.lastname, p.linkedinurl, p.orgcrunchbaseurl
FROM public.prospect pr LEFT JOIN
     public.people p
     ON pr.organization = p.organization
WHERE pr.rating BETWEEN 1 and 2;