How can I use the GROUP_CONCAT function in SQLite to display data in a comma-separated format?

GROUP_CONCAT Function in SQLite

Challenge:

To display data in a specific format, such as comma-separated values, by utilizing the GROUP_CONCAT function in SQLite.

Solution:

In order to use the GROUP_CONCAT function effectively, it is necessary to group the results using the GROUP BY clause. The following query addresses this issue:

<code class="sql">SELECT AI._id, GROUP_CONCAT(Name) AS GroupedName
FROM ABSTRACTS_ITEM AI
JOIN AUTHORS_ABSTRACT AAB ON AI.ID = AAB.ABSTRACTSITEM_ID
JOIN ABSTRACT_AUTHOR AAU ON AAU._id = AAB.ABSTRACTAUTHOR_ID
GROUP BY AI._id;</code>

Another alternative, which is slightly different, is to use the following query:

<code class="sql">SELECT ID,
GROUP_CONCAT(NAME)
FROM
(SELECT ABSTRACTS_ITEM._id AS ID,
Name
FROM ABSTRACTS_ITEM, ABSTRACT_AUTHOR, AUTHORS_ABSTRACT
WHERE ABSTRACTS_ITEM._id = AUTHORS_ABSTRACT.ABSTRACTSITEM_ID
AND ABSTRACT_AUTHOR._id = AUTHORS_ABSTRACT.ABSTRACTAUTHOR_ID)
GROUP BY ID;</code>

By utilizing the GROUP BY clause along with the GROUP_CONCAT function, the data is successfully displayed in the desired format, with comma-separated values for each group.

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