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https://github.com/blacksmithop/neo4j_for_dummies
Introduction to Neo4j
https://github.com/blacksmithop/neo4j_for_dummies
Last synced: 23 days ago
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Introduction to Neo4j
- Host: GitHub
- URL: https://github.com/blacksmithop/neo4j_for_dummies
- Owner: blacksmithop
- Created: 2024-05-03T05:28:44.000Z (8 months ago)
- Default Branch: main
- Last Pushed: 2024-05-03T05:39:30.000Z (8 months ago)
- Last Synced: 2024-10-15T02:22:30.011Z (3 months ago)
- Size: 7.81 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
[Cheat Sheet](https://neo4j.com/docs/cypher-cheat-sheet/5/auradb-enterprise/)
### 1. Database Creation
```cypher
CREATE DATABASE SampleGraphDatabase
```
This creates a database named SampleGraphDatabase
Currently our database is empty
### 2. Insert data
Data is stored in Neo4j as nodes. Each node has a label and properties.
Think of labels as identifiers for a node. It tells us what type of node it is.
If you are familiar with SQL, you would know about columns. Properties are similar to columns
Let us create a Person node and give it a property called name.
```cypher
CREATE (p: Person {name: "Abhinav", userID: 1})
```
### 3. Fetch data
Let's fetch the data we just inserted
```cypher
MATCH (n:Person) RETURN n
```
Here's the node in detail. As you can see each node columns with an id and elementid property by default.
Think of as the ID field in SQL, we will be using this in a lot of queries.
`name` is the property we added to that node.
Now that we have a added a node, it will show up under Datatbase Information.
### 4. Node Relationship
We can create relationships between nodes having different labels.
First, let us create another node.
```cypher
CREATE (AdminProfile: Profile {created_date: datetime("2024-06-30T18:40:32.142+0100"), userID: 0})
```
```cypher
CREATE (ADMIN: Person{name: "Admin User"})
```
Now let us create a relationship called IsOwnerOf
```cypher
MATCH (a:Person),
(b:Profile)
WHERE a.userID = b.userID
```
```cypher
CREATE (a)-[:IsOwnerOf]->(b);
```
Now we have established a relationship between Profile and Person nodes based on their shared userID .
### 5. Fetch data with filters
We can filter our query results with a WHERE clause
```cypher
MATCH (n) WHERE n.userID = 1 RETURN n
```
As you can see these nodes have a relation between them.
Here's the entire database
