How can I use JOINs with DataTables' ssp.class.php library?

Joining Tables with ssp.class.php

Querying multiple tables and joining their results is a common operation when working with databases. In the case of DataTables, the ssp.class.php library is frequently used for server-side processing. However, this library does not inherently support JOINs.

To overcome this limitation, we can use a workaround by creating a sub-query that joins the necessary tables. By defining the $table variable as a sub-query, we can retrieve additional columns like father_name while preserving the original column values.

Updated Code:

$table = <<<EOT
(
    SELECT 
      a.id, 
      a.name, 
      a.father_id, 
      b.name AS father_name
    FROM table a
    LEFT JOIN table b ON a.father_id = b.id
) temp
EOT;

In this sub-query, we use a LEFT JOIN to retrieve the father's name from the table with a matching father_id.

Modification to ssp.class.php:

Furthermore, we need to edit ssp.class.php to remove backticks from the FROM clause:

Replace all instances of FROM `$table`  with FROM $table 

Note:

Ensure that all column names are unique or use aliases with AS to avoid conflicts.

By implementing this workaround, you can effectively join tables using ssp.class.php and retrieve additional columns in your DataTable.

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