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If you know that the keywords and entities don't have any commas in them 
then the following is an alternative to subqueries:

  SELECT b.identifier,
          replace(GROUP_CONCAT(distinct e.entity), ',', '; ') AS entities,
          replace(GROUP_CONCAT( distinct k.keyword), ',', '; ') AS keywords
   FROM bibliographics AS b
   LEFT JOIN entities  AS e ON e.identifier IS b.identifier
   LEFT JOIN keywords  AS k ON k.identifier IS e.identifier
   GROUP BY b.identifier

The caveat is necessary because distinct can only be used in this way in 
a one argument function, so you have to accept the default way that 
group_concat joins the values and fix it up.

On 10/29/21 9:46 AM, Eric Lease Morgan wrote:
> How do I join multiple tables in an SQLite database in order to output the values in the linked tables?
>
>
> I have a database with the following structure:
>
>    create table bibliographics (
>        identifier  TEXT PRIMARY KEY,
>        title       TEXT
>    );
>
>    create table keywords (
>        identifier TEXT,
>        keyword    TEXT
>    );
>
>    create table entities (
>        identifier TEXT,
>        entity     TEXT
>    );
>
>
> I want output looking like this:
>
>    identifier = homer
>    keywords   = love; honor; truth; justice;
>    entities   = jove; troy; helen; son; ship
>
>
> Here is my SQL query:
>
>    SELECT b.identifier,
>           GROUP_CONCAT( e.entity,  '; ' ) AS entities,
>           GROUP_CONCAT( k.keyword, '; ' ) AS keywords
>    FROM bibliographics AS b
>    LEFT JOIN entities  AS e ON e.identifier IS b.identifier
>    LEFT JOIN keywords  AS k ON k.identifier IS e.identifier
>    GROUP BY b.identifier
>
>
> Unfortunately, my output is looking much like this:
>
>    identifier = homer
>    keywords   = love; honor; truth; justice;
>    entities   = jove; troy; helen; son; ship; jove; troy; helen; son; ship; jove; troy; helen; son; ship; jove; troy; helen; son; ship; jove; troy; helen; son; ship; jove; troy; helen; son; ship;
>
>
> What am I doing wrong?
>
>
> --
> Eric Morgan