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SOQL Limits on Objects

Some objects or situations have specific limits on SOQL.

Object	Description
ContentDocumentLink	A SOQL query must filter on one of `Id`, `ContentDocumentId`, or `LinkedEntityId`.
External objects	A subquery that involves external objects can fetch up to 1,000 rows of data. Each SOQL query can have up to 4 joins across external objects and other types of objects. Each join requires a separate round trip to the external server when executing the query. Expect longer response times for each join in a query. External objects don’t support aggregate functions, including the following. `AVG()` function `COUNT()` function `HAVING` clause `GROUP BY` clause `MAX()` function `MIN()` function External objects also don’t support the following. `EXCLUDES` operator `FOR VIEW` clause `FOR REFERENCE` clause `INCLUDES` operator `LIKE` operator `toLabel()` method `TYPEOF` expression `WITH` clause
NewsFeed	No SOQL limit if logged-in user has “View All Data” permission. If not, specify a LIMIT clause of 1,000 records or fewer. SOQL ORDER BY on fields using relationships is not available. Use ORDER BY on fields on the root object in the SOQL query.
KnowledgeArticleVersion	Always filter on a single value of PublishStatus unless the query filters on one or more primary key IDs. To support security, only users with the “Manage Articles” permission see articles whose PublishStatus value is `Draft`. Archived article versions are stored in the articletype_kav object. To query archived article versions, specify the article Id and set `sLatestVersion='0'`. Always filter on a single value of Language. However, in SOQL, you can filter on more than one Language if there is a filter on Id or KnowledgeArticleId.
RecentlyViewed	The RecentlyViewed object is updated every time the logged-in user views or references a record. It is also updated when records are retrieved using the `FOR VIEW` or `FOR REFERENCE` clause in a SOQL query. To ensure that the most recent data is available, RecentlyViewed data is periodically truncated down to 200 records per object.
TopicAssignment	No SOQL limit if logged-in user has “View All Data” permission. If not, do one of the following: Specify a LIMIT clause of 1,100 records or fewer. Filter on `Id` or `Entity` when using a `WHERE` clause with "=".
UserRecordAccess	Always use the query formats specified in the SOAP API Developer's Guide. May include an `ORDER BY` clause. You must `ORDER BY` HasAccess if you `SELECT` HasAccess, and `ORDER BY` MaxAccessLevel if you `SELECT` MaxAccessLevel. Maximum number of records that can be queried is 200.
UserProfileFeed	No SOQL limit if logged-in user has “View All Data” permission. If not, specify a LIMIT clause of 1,000 records or fewer. SOQL ORDER BY on fields using relationships is not available. Use ORDER BY on fields on the root object in the SOQL query. Also, a SOQL query must include `WITH UserId = {userId]`.
Vote	`ParentId = [single ID]` `Parent.Type = [single type]` `Id = [single ID]` `Id IN = [list of IDs]`