rebuild index and update statistics

Refer to http://blog.sina.com.cn/s/blog_630d50dc0102vwwh.html

1.UPDATE STATISTICS table with fullscan-->this will update both on index statistics and column statistics

2.Update statistics table with fullscan, index->this will update index statistics

3.Update statistics table with fullscan, column ->this will update column statistics

4.Rebuild indexes(ALTER INDEX on table REBUILD)-> this will only update the indexes statistics.

5.Reorganize indexes(ALTER INDEX on table REORGANIZE)-> this will not update indexes statistics and column statistics