{keyword};select - Dbms_pipe.receive_message(chr(108)||chr(98)||chr(116)||chr(86),5) From Dual--

: This is a built-in Oracle function. In this context, it is being used to force the database to pause or "sleep" for a specific amount of time [2, 4].

It looks like you've shared a snippet of code designed for an attack, specifically a time-based blind injection [1, 2]. Technical Breakdown : This is a built-in Oracle function

: This is likely a placeholder where a legitimate search term or data value would normally go. specifically a time-based blind injection [1

: DUAL is a special one-row table in Oracle used to execute functions that don't need data from a specific table [6]. : This is a built-in Oracle function