Examples for writing SOQL queries

Questions
6

I have already check.Please check my code

 var params = arguments[0],
    step = params.step,
    stepEditor = step.editor,
  $ = skuid.$; 
stepEditor.clearMessages();

var contactModel=skuid.model.getModel("AddContact");
var raw=contactModel.getFirstRow();
var Firstname=raw.FirstName;
var Middlename=raw.MiddleName;
var LastName=raw.LastName;
var Birthdate=raw.Birthdate;
var Name='';

if(Firstname!==undefined)
{
    Name+=Firstname;
}
if(Middlename!==undefined)
{
    Name+=' '+Middlename;
}
if(LastName!==undefined)
{
    Name+=' '+LastName;
}


if(Firstname===undefined  || LastName===undefined){
    
    alert('Please Enter First Name, Last Name');
    return false;
}

var Agcontact=skuid.model.getModel(“Agcontact”);
Agcontact.doQuery=false;
Agcontact.updateData();
if(Firstname!==undefined){
var FirstNamecondition = Agcontact.getConditionByName(‘FirstName’);
Agcontact.setCondition(FirstNamecondition,Firstname,true);
}
if(Middlename!==undefined){
var Middlenamecondition = Agcontact.getConditionByName(‘MiddleName’);
Agcontact.setCondition(Middlenamecondition,Middlename,true);
}
if(LastName!==undefined){
var LastNamecondition = Agcontact.getConditionByName(‘LastName’);
Agcontact.setCondition(LastNamecondition,LastName,true);
}

if(Birthdate!==undefined){
var bd=new Date(Birthdate);
var ageDifMs = Date.now() - bd.getTime();
var ageDate = new Date(ageDifMs); // miliseconds from epoch
var age=Math.abs(ageDate.getUTCFullYear() - 1970);
if(age<18){
alert(“Candidate’s age is less than 18”);
}

var Birthdatecondition = Agcontact.getConditionByName(‘Birthdate’);
Agcontact.setCondition(Birthdatecondition,Birthdate,true);
}
Agcontact.recordsLimit=1;
skuid.model.updateData([Agcontact]);

//Agcontact.load();

Agcontact.doQuery=true;
Agcontact.updateData();
//Agcontact.load();
try{
console.log(‘rohit’);
console.log(Agcontact);

console.log(skuid.model.getModel(“Agcontact”).data);

if(Agcontact.data.length>0)
{
var messages = ;
var msg = ;
msg.message=Name+’ is already registor.Do you want to continue?..Click me’;
msg.severity=‘WARNING’;
messages.push(msg);
if (messages.length) {
var r = confirm(Name+’ is already registor’);
if (r === true) {
return true;
} else {

      stepEditor.handleMessages(messages);
      return false;
}

}

}

}catch(e){

}