How to update a table ?

For example selects the table myTable for update. Any records with the name equal to 'my name' are updated. The AmountMST field has 100 added to its current value, and the AccountNum field is changed to account number 1050.

tsBegin;

select forUpdate myTable
         where myTable.Name=='My name';
 
myTable.AmountMST += 100;
myTable.AccountNum = 1050;
 
MyTable.update();
 
ttsCommit;