PLSQL does not modify the way tnsname directly connects to the database

PLSQL directly connects to the database without modifying tnsname
, and directly enters 192.168.1.6:1521/VP in the Database of PLSQL.
192.168.1.6 is the IP of the database;
1521 is the port of the database;
VP is the SID of the database.

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