Please use the form below to provide your feedback. Because your feedback is valuable to us, the information you submit in this form is recorded in our issue tracking system (JIRA), which is publicly available. You can track the status of your feedback using the ticket number displayed in the dialog once you submit the form.

A newer version of this documentation is available.

View Latest

Selection Queries

      +

      These guides explain how to read data with a SQL++ query. The SQL++ query language enables you to retrieve a document by inspecting its contents to see if it matches a certain criterion. Key-value operations are quicker, but querying documents allows for richer search capabilities — for example, "Give me all likes and followed users located in the US", versus "Give me a user with the ID e3d882a4".

      This page is for Couchbase Server.

      Selecting Data with Queries

      To read data from a data source using SQL++, you must use a selection query; that is, a query using the SELECT statement.

      Querying Across Relationships

      You can use a join to read objects from one data source, combine them with corresponding objects from another data source, and return the joined objects.

      Nesting and Unnesting Documents

      SQL++ provides syntax which enables you to nest (create) or unnest (flatten) arrays of embedded documents in a query.

      Grouping and Aggregation

      You can use aggregate functions to perform calculations over multiple values. Grouping enables you to display the results in groups.