Constructing a string out of several records with 2 columns

Question

I have prepared a simple SQL Fiddle for my question -

In a word game written in Pl/pgSQL for PostgreSQL 10.2 player moves are stored in the table:

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Answer 1

Use FORMAT (as described in the manual) to format your string before aggregation:

SELECT STRING_AGG(FORMAT('%s (%s)', word, score), ', ') FROM words_scores WHERE mid=230;

Here's the updated SQL Fiddle.