If your application connects to Database, then you can create user provided service to DB and bind the app to this service
***NOTE: Please make sure that Database user Password do not have special characters like /, $, @*
cf create-user-provided-service <my-oracle-db> -p '{"credentials": {"uri": "oracle://$username:$password@$hostname:$port/$name"}}'
cf bind-service <app-name> <my-oracle-db>
cf restage <app-name>
cf create-user-provided-service <my-mysql-db> -p '{"credentials": {"uri": "mysql://$username:$password@$hostname:$port/$name"}}'
cf bind-service <app-name> <my-mysql-db>
cf restage <app-name>
cf create-user-provided-service <my-db2-db> -p '{"credentials": {"uri": "db2://$username:$password@$hostname:$port/$name"}}'
cf bind-service <app-name> <my-db2-db>
cf restage <app-name>
cf create-user-provided-service <my-sqlserver-db> -p '{"credentials": {"uri": "sqlserver://$username:$password@$hostname:$port/$name"}}'
cf bind-service <app-name> <my-sqlserver-db>
cf restage <app-name>
cf create-user-provided-service <my-mongo-db> -p '{"credentials": {"uri": "mongodb://$username:$password@$hostname:$port/$db"}}'
cf bind-service <app-name> <my-mongo-db>
cf restage <app-name>