sqlserver 2005
1.收缩数据库
BACKUP LOG SYSDB WITH NO_LOG
DBCC SHRINKDATABASE(SYSDB)
2.删除索引|修改字段属性|创建聚集索引
DROP INDEX GSP_Index ON GPS_ly100070
alter table GPS_ly100070 alter column Dt datetime
CREATE clustered INDEX GSP_Index ON GPS_ly100070 (dt)