text: -- @testpoint: 创建表单列不带名字的约束
  
  --创建表单列不带名字的约束1
  drop table if exists Persons;
  create table Persons ( Id_P int not null, LastName varchar(255) not null, FirstName varchar(255),
  address varchar(255), City varchar(255),check (Id_P>0) );
  
  --创建表单列不带名字的约束2
  drop table if exists Persons;
  create table Persons ( Id_P int not null check (Id_P>0), LastName varchar(255) not null,
  FirstName varchar(255), address varchar(255), City varchar(255) );
  drop table Persons cascade;