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`dg` vs `du` in PostgreSQL

I showed users(roles) with dg and du, then there were the same results as shown below: postgres=# dg List of roles Role name | Attributes -----------+------------------------------------------------------------ anna | john | postgres | Superuser, Create role, Create DB, Replication, Bypass RLS…

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How to save PDF file into MYSQL database? (PHP)

I'm trying to save all the information inserted by user into database, all the info are able to save except the pdf file. My code: usermanual.php <div id="usermanualModal" class="modal fade"> <div class="modal-dialog"> <form method="post" enctype="multipart/form-data" id="usermanualForm"> <div class="modal-content"> <div class="modal-header">…

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