The reference to SYSIBM.SYSDUMMY1 is a dead giveaway that the target is an IBM DB2 database. This is a special "one-row, one-column" table used to perform calculations or retrieve system values.
This is a final "always true" statement used to ensure the rest of the original, legitimate SQL query doesn't break the injection. What is the Goal? The reference to SYSIBM
If the website loads normally, the attacker knows the database processed the "True" statement ( dUfS = dUfS ) successfully. The reference to SYSIBM
The 'KEYWORD' starts by closing a legitimate search or input field with a single quote. This allows the attacker to append their own logic. The reference to SYSIBM