约束不适用于sqlserver

Question

我应用了约束，但未考虑。

即使您输入的评分为63（即使不允许）也会被接受。

CREATE TABLE IF NOT EXISTS `song` (
  `id` int(6)  NOT NULL, -- may be needed
  `name` varchar(15)  NOT NULL,
  `type` varchar(15) NOT NULL,
  `rate` varchar(2) NOT NULL,
  CONSTRAINT chk_rate CHECK (rate IN ('1','2','3','4','5','6','7','8','9','10')),
  `release date` int(10) NOT NULL,
  PRIMARY KEY (`id`)
) ;
INSERT INTO `song` (`id`, `name`, `type`,`rate`,`release date`) VALUES
  ('1', 'bye bye', 'rock',63,2010),
  ('2', 'this is fun ', 'pop',6,2006),
  ('3', 'the drink', 'trance',8,2009),
  ('4', ' cars', 'rock',8,2008),
  ('5', 'this snow', 'ost',8,2012);