What Data Type Is ID Apex?


Heather Bennett

What Data Type Is ID Apex?

In Apex, the ID data type is used to represent record identifiers. It is a unique identifier assigned to each record in Salesforce. The ID data type can be used to query, update, and delete records in Apex code.

Characteristics of the ID Data Type

The ID data type has the following characteristics:

  • Length: An ID is a 15-character alphanumeric value.
  • Case-Sensitive: IDs are case-sensitive, meaning that ‘001ABC’ and ‘001abc’ are considered different IDs.
  • Globally Unique: Each ID is globally unique across all Salesforce organizations.

Usage of the ID Data Type

The ID data type is primarily used for:

  • Record Identification: The primary use of the ID data type is to uniquely identify records in Salesforce. When querying or manipulating records using Apex code, the ID field is commonly used as a reference to specific records.
  • Relationships: In Salesforce, relationships between objects are defined using fields that store record IDs. These fields can be queried and manipulated using the ID data type in Apex code.

Example Usage:

Lets consider an example where we want to query a specific Account record using its ID:

// Querying an Account record by its ID
ID accountId = '001ABC123XYZ';
Account acc = [SELECT Name FROM Account WHERE Id = :accountId];
System.debug('Account Name: ' + acc.Name);

In the above example, we declare a variable accountId of type ID and assign it with the desired Account record’s ID. We then use this ID to query the Account record and retrieve its Name field.


The ID data type in Apex is crucial for identifying and manipulating records in Salesforce. Its uniqueness, length, and case-sensitivity make it a reliable way to reference specific records in Apex code. By understanding the characteristics and usage of the ID data type, developers can effectively work with record identifiers in their Apex applications.

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