...
For example, cp mysql-connector-java-5.XX-bin.jar /home/user/wso2ds/wso2-dataservices-XX/repository/components/lib.
Next, simply use that datasource data source at the time a data service is created. FThat is, you must first follow the steps in Creating datasourcesfrom 1 to 3 in creating a data service using various data sources. When you select Carbon datasource as the datasource type at the time a datasource is created, you get to the Add New Data Source screen, select Carbon Data Source as the data source type. You get a drop-down list from which an existing Carbon datasource data source can be selected . For example:as shown below.
To write a query to this datasource, see Writing Data Service Queries.