sql数据库聚集索引和非聚集索引示例: create database myIndexDemogouse myIndexDemogocreate table ABC(A int not null,B char(10),C varchar(10))goinsert into ABCselect 1,'B','C'unionselect 5,'B','C'unionselect 7,'B','C'unionselect 9,'B','C'go select * from ABC --在ABC表上创建聚集索引cr