This question runs in a pre-configured Salesforce environment - no personal connection required.

Create a method that upserts Account records using DML operations.

Parameters:

  • accounts (List<Account>): List of Account records to upsert

Returns:

  • Integer: The number of accounts processed, or 0 if none

Requirements:

  • Use DML upsert operation
  • Handle null or empty accounts list by returning 0
  • Handle DML exceptions gracefully
  • Return the count of successfully processed records

Example:

List<Account> accounts = new List<Account>{
    new Account(Name = 'Acme Corp', AccountNumber = 'EXT001')
};
Integer processed = upsertAccountsWithExternalId(accounts);
// Returns: 1
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