Web Reference: You must have at least one database connection (existing, created, or imported) to use SQL Developer. To create a database connection , perform the following steps: Oct 30, 2019 · How do we open a new SQL worksheet in SQL Developer? Sep 8, 2013 · Open Oracle SQLDeveloper. Right click on connection tab and select new connection. Enter HR_ORCL in connection name and HR for the username and password. Specify localhost for your Hostname and enter ORCL for the SID. Click Test. The status of the connection Test Successfully.
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