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How do I update a field in Apex Salesforce?
To update records in Apex with SOQL you will first have to query the records that need to be updated. Add the updated values to the fields as needed and then update the records using a Data manipulation language(DML) update method.
What is for update in Apex?
In Apex, you can use FOR UPDATE to lock sObject records while they’re being updated in order to prevent race conditions and other thread safety problems. While an sObject record is locked, no other client or user is allowed to make updates either through code or the Salesforce user interface.
How to update a custom field in apex?
All I want to do is make “field A” update with “field B” value after update. That should do the trick, you want to do this on a before update trigger to avoid an infinite loop which the system will not allow.
How to insert and update records in apex?
Using DML, you can insert new records and commit them to the database. Similarly, you can update the field values of existing records. This example inserts three account records and updates an existing account record.
When to use dynamic apex in Salesforce Stack Exchange?
If you did find yourself in a situation in which you need every field, there are ways using dynamic apex or Field Sets to obtain all of the fields for a specified object and use those fields to build a query dynamically so users do not need to update the query every time a new field is added.
What did apex trigger updatecommissionfields cause an unexpected exception?
Apex trigger UpdateCommissionFields caused an unexpected exception, contact your administrator: UpdateCommissionFields: execution of BeforeUpdate caused by: System.QueryException: Non-selective query against large object type (more than 200000 rows). Consider an indexed filter or contact salesforce.com about custom indexing.