Learn in the textbookDatabase and DBMS Basics, and Types of NoSQL
DefinitionA graph-oriented database (グラフ指向データベース) is a NoSQL type that saves data as nodes (points) and the connections between data as edges (lines).
Explanation"Graph" here does not mean a line chart but a network of points joined by lines. Because it stores the connections themselves as data, it is good at following links through many steps, such as friends of friends or routes from station to station.
AnalogyIt is like saving a relationship chart as is, with each person's name circled and lines drawn between people who are connected.
Memory hookA graph here means not bars or lines on a chart but a rail map of stations (points) and tracks (lines).