How to solve the problem that the navicat listening program is currently not recognized

When using navicat to connect to Oracle, the program reported an error, prompting: "ORA-12514, TNS:listener does not currently know of service requested in connect descriptor". After checking, it was because The service name is spelled incorrectly.

Solution:

The first step is to find tnsnames.ora in the oracle installation directory.

(Directory example of tnsnames.ora: D:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora)

Related recommendations: "Navicat for Mysql graphic tutorial》

The second step is to find the service_name in tnsnames.ora. This is the service name that needs to be filled in when navicat connects to the database:

The third step is to fill in the corresponding service_name in the connection attributes of navicat, and of course host, username, password, etc. If normal, the connection should be successful.

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