How PLSQL Developer accesses the server through the Oracle client

1) Install oracle data client

 

2) After the installation is complete, find the installation directory of the oracle database

      Create a tnsnames.ora file and add the following information to the file

ORCL =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

3) Open plsql, there is database connection information