区分大小写的排序（词法排序）不起作用 PostgreSQL citext 类型

Question

I want to perform search and sorting simultaneously for the citext type in PostgreSQL.

select name from employee ORDER BY name ASC;

For the above query I get the following sort order:

"Adam"
"balaji"
"Cartus"
"dalal"
"erfan"
"Eric"
"Focus"
"lucus"

Is there any way to sort in the below order:

"Adam"
"Cartus"
"Eric"
"Focus"
"balaji"
"dalal"
"erfan"
"lucus"

I am using postgres version "PostgreSQL 9.4.10, compiled by Visual C++ build 1800, 64-bit".

Answer 1

You could use

ORDER BY name::text COLLATE "POSIX"

That will cast name to a case sensitive type and use the binary collation.