Your First SOSL Search

List<List<sObject>> searchResults = [
    FIND 'Riverbend Farms' IN ALL FIELDS
    RETURNING Account(Id, Name)
];

List<Account> matchingAccounts = searchResults[0];
System.debug(matchingAccounts.size());

1. List<List<sObject>> searchResults = [ — opens the search, stored as a list of lists.
2. FIND 'Riverbend Farms' IN ALL FIELDS — FIND names the search text; IN ALL FIELDS means search every searchable text field.
3. RETURNING Account(Id, Name) — names which fields to return for matching Account records.
4. ]; — closes the search.
5. (blank line)
6. List<Account> matchingAccounts = searchResults[0]; — the first (and only) inner list, holding the Account matches.
7. System.debug(matchingAccounts.size()); — logs how many matched.

List<List<sObject>> searchResults = [
    FIND 'Riverbend Farms' IN ALL FIELDS
    RETURNING Account(Id, Name), Contact(Id, LastName)
];

List<Account> accounts = searchResults[0]; // matches from Account
List<Contact> contacts = searchResults[1]; // matches from Contact

1. List<List<sObject>> searchResults = [ — this is exactly Module 16's "Nested Collections" pattern applied to search results.
2. FIND 'Riverbend Farms' IN ALL FIELDS — the search text and scope.
3. RETURNING Account(Id, Name), Contact(Id, LastName) — now two object types named, in this order.
4. ]; — closes the search.
5. (blank line)
6. List<Account> accounts = searchResults[0]; — the outer List has one entry per object named in RETURNING, in the same order — index 0 for the first object named.
7. List<Contact> contacts = searchResults[1]; — index 1 for the second.

List<Account> matchingAccounts = (List<Account>) searchResults[0];

1. List<Account> matchingAccounts = (List<Account>) searchResults[0]; — depending on how the result is used, the inner List<sObject> may need casting to its specific type — this is Module 18's sObject polymorphism concept (a specific type can be cast back down from the generic base type) showing up directly in a real SOSL result.