SOQL and SOSL Reference

Introduction to SOQL and SOSL
Salesforce Object Query Language (SOQL)
Typographical Conventions in This Document
Quoted String Escape Sequences
Reserved Characters
Alias Notation
SOQL SELECT Syntax
Relationship Queries
Understanding Relationship Names
Using Relationship Queries
Understanding Relationship Names, Custom Objects, and Custom Fields
Understanding Query Results
Lookup Relationships and Outer Joins
Identifying Parent and Child Relationships
Understanding Relationship Fields and Polymorphic Fields
Understanding Relationship Query Limitations
Using Relationship Queries with History Objects
Using Relationship Queries with Data Category Selection Objects
Using Relationship Queries with the Partner WSDL
Change the Batch Size in Queries
SOQL Limits on Objects
Syndication Feed SOQL and Mapping Syntax
Location-Based SOQL Queries
Async SOQL
Salesforce Object Search Language (SOSL)
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Using Relationship Queries with Data Category Selection Objects

Data categories are used to classify records. In SOQL, you can use the Article__DataCategorySelection or QuestionDataCategorySelection objects. You can also build a relationship query with the DataCategorySelections relationship name in a FROM clause.

Imagine an Offer article type. The following query returns the ID of any categorization associated with an offer and the ID of the categorized article.

The following example uses the DataCategorySelections relationship name to build a relationship query that returns the ID of published offers and the ID of all the categorizations associated to these offers.