CQL Query Language -- Neo4j

This document is summarized based on the introdcution of Neo4j in W3Cschool

Neo4j CQL common order/clause:

1. ###CREATE

   1.1 Used to create non-attar node; create a non-statistic node

   Grammar: CREATE (<node-name:)

   : node name to create

   : node tag name

   1.2 Used to create attractive node

   Grammar: CREATE(

   ​ :

   ​ {

   ​ :

   ​ ……

   ​ :

   ​ }

   )

   Attr is a key-value pair.

   1.3 Used to create one label for node

   Used to create multiple labels for node

   Grammar: CREATE (::……:)

   Used to create one label for relation

   Grammar: CREATE(:)-[(:)]—>(:)

2. MATCH

   Used to achieve data related to nodes and attrs;

   Used to achieve data related to nodes, relations and attrs.

   Grammar: MATCH(

   ​ :

   )

3. RETURN

   Used to retrieve some attrs of node;

   Used to retrieve all attrs of node;

   Used to retrieve some attrs of node and relations;

   Used to retrieve all attrs of node and relations

   Grammar: RETURN

   ​ .,

   ​ …….

   ​ .

   Concat ‘Match’ and ‘Return’ to retrieve

   E.G. MATCH(dept: Dept)

   ​ RETURN dept.deptno, dept.dname

4. WHERE

5. DELETE

6. REMOVE

7. ORDER BY

8. SET

RELATION

Unilateralism

Bilateralism