Creating a dynamic SOQL which includes all the fields

SOQLService.cls

Map<String,Schema.SObjectField> mapFields = Account.getSObjectType().getDescribe().fields.getMap(); 
List<String> fieldNames = new List<String>();
for( String fieldName : mapFields.keySet() ) {
     fieldNames.add( fieldName );
     // For relationship fields
     if( Schema.DisplayType.Reference == mapFields.get(fieldName).getDescribe().getType() )
     fieldNames.add( mapFields.get(fieldName).getDescribe().getRelationshipName() + '.Name' ); 
} 
String query = 
    ' SELECT ' + 
    String.join( fieldNames, ',' ) + 
    ' FROM Account ' +
    ' WHERE ' + 
    ' Id = :recorId ';
         
List<Account> lstRecords = Database.query( query );