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A query is an inquiry into the database using the SELECT statement. A query is used to extract data from the database in a readable format according to the user's request.

Salesforce SOQL and SOSL Queries

SOQL Statements

SOQL statements evaluate to a list of sObjects, a single sObject, or an Integer for count method queries.

SOSL Statements

SOSL statements evaluate to a list of lists of sObjects, where each list contains the search results for a particular sObject type. The result lists are always returned in the same order as they were specified in the SOSL query. If a SOSL query does not return any records for a specified sObject type, the search results include an empty list for that sObject.