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Explain how to use the Developer tool to connect to the oracle database.

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Explain how to use the Developer tool to connect to the oracle database.

1. You cannot log on to oracle as a common user. If you do not know why, log on to oracle as a system user.

Sqlplus

Sys/as sysdba

Liu123

2. Change the password of a common user

Alter user liuzq identified liu123

3. Connect to the liuzq user

Conn liuzq/liu123

4. Start the listener

Lsnrctl start

5. Disable the Firewall

Systemctl stop firewalled

6. Use Developer to connect to the oracle database

User name: liuzq

Password: liu123

Host Name: 192.168.91.147

Port 1521

Sid: orcl

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