CreateQuery kql_table2 (children 3)
 Identifier kql_table2
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration FirstName (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration LastName (children 1)
    DataType String
   ColumnDeclaration Age (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType UInt8
 Storage definition (children 1)
  Function Memory