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Dgraph DQL Tour

Basic

Pagination (first, offset and after)

It’s not uncommon to have thousands of results for a query.

But you might want to select only the top-k answers, paginate the results for display, or limit a large result.

In DQL this is done with first, offset and after in combination with ordering.

  • first: N Return only the first N results
  • offset: N Skip the first N results
  • after: uid Return the results after uid

By default, query answers are ordered by uid. You can change this behavior by explicitly specifying an order.

after makes sense in pagination when we only know the last uid returned and don’t record how many results have previously been retrieved.

Dgraph DQL Tour

An interactive tutorial with real queries and real results, designed to run on Chrome on your machine.

Modules

. GraphQL Introduction . GraphQL Basic Features . GraphQL Schema . GraphQL Search . GraphQL Data and More Data . DQL Introduction . DQL Basic Features . DQL Schema . DQL Data and More Data . DQL Query Blocks and Variables . DQL Search

DQL Basic Features

Here you'll learn the basics of how to query graph data from Dgraph and how to use and interpret the results.

Module Breakdown

2.1. Hello World 2.2. Graphs as results 2.3. Data types, Schema and Type System 2.4. Language Support 2.5. Queries describe graphs 2.6. Functions and filtering 2.7. AND, OR and NOT 2.8. Sorting (orderasc or orderdesc) 2.9. Pagination (first, offset and after) 2.10. Count 2.11. How Dgraph Search Works 2.12. Has 2.13. Alias 2.14. Cascade 2.15. Normalize 2.16. Comments 2.17. Facets : Edge attributes 2.18. Congratulations
Endpoint: /query
Dgraph: http://localhost:8080
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Response

2.9 Pagination (first, offset and after)