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How to do a soql query in apex?
For example, this code retrieves an sObject list from the database with a SOQL query, accesses the first account record in the list, and then dereferences the record’s AnnualRevenue field: // to include the list’s index.
When to use Apex code variables in SOSL?
SOQL and SOSL statements in Apex can reference Apex code variables and expressions if they’re preceded by a colon (:). This use of a local code variable within a SOQL or SOSL statement is called a bind.
Can a sobject field be changed in apex?
Any changes to other fields that are used within the formula are not reflected in the formula field value until the record has been saved and re-queried in Apex. Like other read-only sObject fields, the values of the formula fields themselves cannot be changed in Apex.
How are sobjects retrieved in soql for loops?
While the standard queries discussed in SOQL and SOSL Queries can retrieve either the count of a query or a number of object records, SOQL for loops retrieve all sObjects, using efficient chunking with calls to the query and queryMore methods of the SOAP API.
How to work with SOSL and soql query results?
Working with SOQL and SOSL Query Results. 1 Double rev = [SELECT AnnualRevenue FROM Account. 2 WHERE Name = ‘Acme’] [0].AnnualRevenue; 3 // When only one result is returned in a SOQL query, it is not necessary. 4 // to include the list’s index. 5 Double rev2 = [SELECT AnnualRevenue FROM Account. 6 WHERE Name = ‘Acme’ LIMIT 1].AnnualRevenue;
What causes runtime error in soql and SOSL?
SOQL and SOSL queries only return data for sObject fields that are selected in the original query. If you try to access a field that was not selected in the SOQL or SOSL query (other than ID), you receive a runtime error, even if the field contains a value in the database. The following code example causes a runtime error:
What causes a runtime error in apex?
The following code example causes a runtime error: The following is the same code example rewritten so it does not produce a runtime error. Note that Name has been added as part of the select statement, after Id. Even if only one sObject field is selected, a SOQL or SOSL query always returns data as complete records.