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var request = { 
    "type" : "select",
    "object" : "Account",
    "data" : { "query" : "Select Id from Account Where Name like '%hello%'" }
};
bridge.sendRequest(request, function (responseData) {
    alert('Javascript got its select response: ' + responseData);
});

We encourage you to use the standard CRUD updaterequest, (see above).  The updateQueryrequest allows developers to issue a raw UPDATE to the local database.