How to solve the problem that Navicat cannot connect to the database

Solution to Navicat not being able to connect to the database

Navicat not being able to connect to the database is a common problem that may be caused by a variety of reasons. Here are common steps to resolve this issue:

1. Check your network connection

Make sure your computer is connected to the network where the database server is located. If you are using a remote database, check if your firewall settings allow Navicat to access the server.

2. Check the database credentials

Ensure that the user name, password and database name entered in Navicat are correct.

3. Check the database service status

On the database server, check whether the database service is running. If the service is stopped, restart the service.

4. Check the port number

Make sure the port number used in Navicat is consistent with the port number on the database server. By default, most databases use the following ports:

• MySQL: 3306
• MariaDB: 3306
• PostgreSQL: 5432
• Oracle: 1521

5. Check the server IP address

Make sure the database server IP address or host name entered in Navicat is correct.

6. Disable the firewall

In some cases, the firewall will prevent Navicat from connecting to the database. Try temporarily disabling the firewall and try reconnecting.

7. Check permissions

Make sure you have permission to connect to the database. If you are using a shared database, your account must be granted access.

8. Check the connection properties

In Navicat, navigate to Connection >Properties and check that the following settings are correct:

• Connection type: Select TCP/IP or Named Pipe as needed
• Host: Enter the IP address or host name of the database server
• Port:Enter the port number of the database
• Username:Enter your database username
• Password:Enter Your database password

9. Repair the database

If you have tried all the above steps and still cannot connect, the database may be corrupted. Try to use database repair tool to repair the database.

10. Reinstall Navicat

If all other methods fail, you can try to reinstall Navicat.

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