原来sqlserver也能用序列呀，我原来以为只有oracle有呢 _浅薄了~

1. 创建序列

CREATE SEQUENCE A_SequenceSTART WITH 1INCREMENT BY 1;

2. 使用序列
   oracle使用序列是A_Sequence.NEXTVAL，而sqlserver是NEXT VALUE FOR A_Sequence

CREATE TABLE A_TABLE
(ID INT DEFAULT(NEXT VALUE FOR A_Sequence) PRIMARY KEY,CreateDate DATETIME
);