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Version: 2.1.0

Importing Cypher queries (.cypherl format)

When Memgraph is running, Cypher queries are imported by running mgconsole in non-interactive mode. The user can import queries saved in e.g. queries.cypherl by issuing the following shell command:

note

If you installed Memgraph through Docker Hub, the name of the Docker image memgraph should be replaced with memgraph/memgraph-platform if you didn't change the image tag.

If you installed Memgraph using Docker, you will need to run the client using the following command:

docker run -i --entrypoint=mgconsole memgraph --host HOST < /path-to/queries.cypherl

Remember to replace HOST with a valid IP of the container (see the Note for Docker users).

For more information about mgconsole options run:

docker run -i --entrypoint=mgconsole memgraph --help

Below, you can find two examples of how to use the CSV Import Tool depending on the complexity of your data:

Examples​

The advantage of using this system to import data is you need only one file to cover both nodes and relationships. The disadvantage of this method is that you need to write the queries for creating nodes and relationships yourself. If you haven't written any queries yet, we highly suggest you check our Cypher manual.

One type of nodes and relationships​

Copy the following into queries.cypherl file:

CREATE (:Person {id: "100", name: "Daniel", age: 30, city: "London"});
CREATE (:Person {id: "101", name: "Alex", age: 15, city: "Paris"});
CREATE (:Person {id: "102", name: "Sarah", age: 101, city: "London"});
CREATE (:Person {id: "103", name: "Mia", age: 25, city: "Zagreb"});
CREATE (:Person {id: "104", name: "Lucy", age: 21, city: "Paris"});
MATCH (u:Person), (v:Person) WHERE u.id = "100" AND v.id = "102" CREATE (u)-[:IS_FRIENDS_WITH]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "100" AND v.id = "103" CREATE (u)-[:IS_FRIENDS_WITH]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "101" AND v.id = "104" CREATE (u)-[:IS_FRIENDS_WITH]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "101" AND v.id = "102" CREATE (u)-[:IS_FRIENDS_WITH]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "102" AND v.id = "103" CREATE (u)-[:IS_FRIENDS_WITH]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "103" AND v.id = "101" CREATE (u)-[:IS_FRIENDS_WITH]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "104" AND v.id = "100" CREATE (u)-[:IS_FRIENDS_WITH]->(v);

The first five queries create nodes for people and the rest of the queries create relationships between nodes. After you have prepared your queries, you can import them with the command below or drag and drop them using the Dataset tab in Memgraph Lab.

docker run -i --entrypoint=mgconsole memgraph --host HOST < queries.cypherl

Because the operator < isn't available in Windows PowerShell, you may need to change the command to:

cmd.exe /c "docker run -i --entrypoint=mgconsole memgraph --host HOST < queries.cypherl"
note

Remember to replace HOST with a valid IP of the container (see the Note for Docker users).

Multiple types of nodes and relationships​

Copy the following into queries.cypherl file:

CREATE (p:Person {id: "100", name: "Daniel", age: 30, city: "London"});
CREATE (p:Person {id: "101", name: "Alex", age: 15, city: "Paris"});
CREATE (p:Person {id: "102", name: "Sarah", age: 17, city: "London"});
CREATE (p:Person {id: "103", name: "Mia", age: 25, city: "Zagreb"});
CREATE (p:Person {id: "104", name: "Lucy", age: 21, city: "Paris"});
CREATE (r:Restraunt {id: "200", name: " Mc Donalds", menu: " Fries BigMac McChicken Apple Pie"});
CREATE (r:Restraunt {id: "201", name: " KFC", menu: " Fried Chicken Fries Chicken Bucket"});
CREATE (r:Restraunt {id: "202", name: " Subway", menu: " Ham Sandwich Turkey Sandwich Foot-long"});
CREATE (r:Restraunt {id: "203", name: " Dominos", menu: " Pepperoni Pizza Double Dish Pizza Cheese filled Crust"});
MATCH (u:Person), (v:Person) WHERE u.id = "100" AND v.id = "103" CREATE (u)-[:IS_FRIENDS_WITH {met_in: "2014"}]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "101" AND v.id = "104" CREATE (u)-[:IS_FRIENDS_WITH {met_in: "2001"}]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "101" AND v.id = "101" CREATE (u)-[:IS_FRIENDS_WITH {met_in: "2018"}]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "102" AND v.id = "100" CREATE (u)-[:IS_FRIENDS_WITH {met_in: "2005"}]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "102" AND v.id = "103" CREATE (u)-[:IS_FRIENDS_WITH {met_in: "2017"}]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "103" AND v.id = "104" CREATE (u)-[:IS_FRIENDS_WITH {met_in: "2005"}]->(v);
MATCH (u:Person), (v:Person) WHERE u.id = "104" AND v.id = "102" CREATE (u)-[:IS_FRIENDS_WITH {met_in: "2021"}]->(v);
MATCH (u:Person), (v:Restraunt) WHERE u.id = "100" AND v.id = "200" CREATE (u)-[:ATE_AT {liked: true}]->(v);
MATCH (u:Person), (v:Restraunt) WHERE u.id = "102" AND v.id = "202" CREATE (u)-[:ATE_AT {liked: false}]->(v);
MATCH (u:Person), (v:Restraunt) WHERE u.id = "102" AND v.id = "203" CREATE (u)-[:ATE_AT {liked: false}]->(v);
MATCH (u:Person), (v:Restraunt) WHERE u.id = "102" AND v.id = "200" CREATE (u)-[:ATE_AT {liked: true}]->(v);
MATCH (u:Person), (v:Restraunt) WHERE u.id = "103" AND v.id = "201" CREATE (u)-[:ATE_AT {liked: true}]->(v);
MATCH (u:Person), (v:Restraunt) WHERE u.id = "104" AND v.id = "201" CREATE (u)-[:ATE_AT {liked: false}]->(v);
MATCH (u:Person), (v:Restraunt) WHERE u.id = "101" AND v.id = "200" CREATE (u)-[:ATE_AT {liked: true}]->(v);

The first five queries create nodes for people, the following four queries create nodes for restaurants. The last CREATE queries are used to define relationships between nodes. As said before, you can define all of the different types of nodes and relationships in one file.

After you have prepared your queries, you can import them with the command below or drag and drop them using the Dataset tab in Memgraph Lab.

docker run -i --entrypoint=mgconsole memgraph --host HOST < queries.cypherl

Because the operator < isn't available in Windows PowerShell, you may need to change the command to:

cmd.exe /c "docker run -i --entrypoint=mgconsole memgraph --host HOST < queries.cypherl"
note

Remember to replace HOST with a valid IP of the container (see the Note for Docker users).