Building graph from database structure to implement A* algorithm?

How do you implement a graph in data structure?

Implementations of Graphs

1. Add a node to the graph.
2. Create an edge between any two nodes.
3. Check if a node exists in the graph.
4. Given a node, return it’s neighbors.
5. Return a list of all the nodes in the graph.
6. Return a list of all edges in the graph.

Which data structure used in graph implementation?

A graph is a non-linear data structure, which consists of vertices(or nodes) connected by edges(or arcs) where edges may be directed or undirected. In Computer science graphs are used to represent the flow of computation.
 

What is the structure of a graph database?

The graph database defined



Graph databases use nodes to store data entities, and edges to store relationships between entities. An edge always has a start node, end node, type, and direction, and an edge can describe parent-child relationships, actions, ownership, and the like.