In this step we download Oracle SQL Developer from the Oracle download site and install Oracle SQL Developer into the fourth VM as demonstrated in Figure 10. Oracle SQL Developer is a client software that can be used to connect to any of the Oracle 12c and 19c databases for data manipulation within the Oracle databases. By running different SQL queries from the Oracle SQL Developer (Figure 11) to Oracle databases, we establish that the Oracle databases are operational
To install Oracle SQL Developer, do the following.
[root@12c-docker ~ #rpm -ivh sqldeveloper-188.8.131.52.2212.noarch.rpm
[root@12c-docker ~] #sqldeveloper
Figure 11. Query the tables