MS SQL Server Interview Question:

How To Rebuild All Indexes on a Single Table?

Submitted by: Administrator

If you have several indexes on a single table and want to rebuild all of them, you may use the "ALTER INDEX ALL ON table_name REBUILD" statement as shown in the tutorial exercise below:

UPDATE ggl_links_indexed
SET url = REVERSE(url), counts = -counts
WHERE id <=50000;
GO
(50000 row(s) affected)

SELECT i.index_id, i.name, s.avg_fragmentation_in_percent
FROM sys.dm_db_index_physical_stats (
DB_ID(N'GlobalGuideLineDatabase'),
OBJECT_ID(N'ggl_links_indexed'),
DEFAULT, DEFAULT, DEFAULT) s, sys.indexes i
WHERE s.object_id = i.object_id
AND s.index_id = i.index_id;
GO
0 NULL 0.574712643678161
2 ggl_links_url 85.750315258512
3 ggl_links_counts 84.040404040404

ALTER INDEX ALL ON ggl_links_indexed REBUILD;
GO

SELECT i.index_id, i.name, s.avg_fragmentation_in_percent
FROM sys.dm_db_index_physical_stats (
DB_ID(N'GlobalGuideLineDatabase'),
OBJECT_ID(N'ggl_links_indexed'),
DEFAULT, DEFAULT, DEFAULT) s, sys.indexes i
WHERE s.object_id = i.object_id
AND s.index_id = i.index_id;
GO<pre>
0 NULL 0.574712643678161
2 ggl_links_url 0.12987012987013
3 ggl_links_counts 0.44843</pre>
Submitted by: Administrator