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Update statement in apex

The DML update statement is used to modify existing records in the salesforce database.

A common update requirement is modifying a customer's address in the system.

To update records in salesforce :

Find the record id of the exsiting record.
Once you have the Id of the record, create an instance of the corresponding object with the desired field updates
Use the DML update operation to save the changes.

Following is an example of a DML update statement in apex to modify an existing account record in salesforce.

Update Operation

Updates an existing record in the database.

In the above example:

The variable accRecord gets its value from the database using an SOQL query, including the record id field.
The account's industry field is populated with value "Technology".
Finally, the DML Update statement is used to save the account changes to the database.