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Create a schema

To batch import data into NebulaGraph, you must have a graph schema. You can create a schema on the Console page or on the Schema page of Studio.

Note

You can use nebula-console to create a schema. For more information, see NebulaGraph Manual and Get started with NebulaGraph.

Prerequisites

To create a graph schema on Studio, you must do a check of these:

  • Studio is connected to NebulaGraph.
  • Your account has the privilege of GOD, ADMIN, or DBA.
  • The schema is designed.
  • A graph space is created.

Note

If no graph space exists and your account has the GOD privilege, you can create a graph space on the Console page. For more information, see CREATE SPACE.

Create a schema with Schema

To create a schema on the Schema page, follow these steps:

  1. Create tags. For more information, see Operate tags.

  2. Create edge types. For more information, see Operate edge types.

Create a schema with Console

To create a schema on the Console page, follow these steps:

  1. In the toolbar, click the Console tab.

  2. In the Current Graph Space field, choose a graph space name. In this example, basketballplayer is used.

    Choose a graph space name for the Current Graph Space field

  3. In the input box, enter these statements one by one and click the button Icon of Run.

    // To create a tag named "player", with two property
nebula> CREATE TAG player(name string, age int);

// To create a tag named "team", with one property
nebula> CREATE TAG team(name string);

// To create an edge type named "follow", with one properties
nebula> CREATE EDGE follow(degree int);

// To create an edge type named "serve", with two properties
nebula> CREATE EDGE serve(start_year int, end_year int);

If the preceding statements are executed successfully, the schema is created. You can run the statements as follows to view the schema.

// To list all the tags in the current graph space
nebula> SHOW TAGS;

// To list all the edge types in the current graph space
nebula> SHOW EDGES;

// To view the definition of the tags and edge types
DESCRIBE TAG player;
DESCRIBE TAG team;
DESCRIBE EDGE follow;
DESCRIBE EDGE serve;

If the schema is created successfully, in the result window, you can see the definition of the tags and edge types.

Next to do

When a schema is created, you can import data.

Last update: March 13, 2023
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