Gremlin queries

Next, use the Gremlin Console to experiment with Gremlin queries in AGS. Explore vertices, traverse edges, and gain hands-on experience with basic graph traversal patterns to better understand the data model.

Query the `air-routes` data

Add a vertex with the addV function:
Terminal window
```
g.addV('foo').property('company','aerospike').property('scale','unlimited')
```
Example response
v[-6001]
Return the ID of the newly-created vertex:
Terminal window
```
g.V().has('company','aerospike')
```
Example response
v[-6001]
Find the airport with code “DFW”:
Terminal window
```
g.V().has('code','DFW')
```
Example response
v[8]
Find the number of airports in this graph:
Terminal window
```
g.V().hasLabel('airport').count()
```
Example response
3504
Find the number of flights going out of the airport with code “SFO”:
Terminal window
```
g.V().has('code','SFO').outE().count()
```
Example response
157
Get all the cities with flights that are > 4000 miles:
Terminal window
```
g.E().has("dist", P.gt(4000L)).inV().values("city").dedup()
```
Example response
Fortaleza Cayo Largo del Sur Varadero Holguin Puerto Plata
Find all the airports in the USA that have flights from London Heathrow (LHR):
Terminal window
```
g.V().has('code','LHR').out('route').has('country','US').values('code')
```
Example response
ATL MSY EWR DTW JFK SAN
Find all the unique locations outside and inside the US that are accessible from SFO through a 2 hop flight:
Terminal window
```
g.V().has("code", "SFO").out().out().dedup().fold().project("totalAirportCountFromSFO",    "USAirportCountFromSFO").by(__.unfold().count()).by(__.unfold().has("country", "US").count())
```
Example response
[totalAirportCountFromSFO:1904,USAirportCountFromSFO:455]

Gremlin queries

Query the air-routes data

Query the `air-routes` data