Open Studio for Big Data
Open Studio for Data Integration
Open Studio for ESB
To create a database connection from scratch, expand Metadata in the Repository tree view, right-click Db Connections and select Create connection from the contextual menu to open the database connection setup wizard.
To centralize database connection parameters you have defined in a Job, click the 
icon in the Basic settings view of
the relevant database component with its Property Type
set to Built-in to open the database connection setup
wizard.
To modify an existing database connection, right-click the connection item from the Repository tree view, and select Edit connection to open the connection setup wizard.
Then define the general properties and parameters of the connection in the wizard.