Difference between fill factor 0 and 100

Difference between fill factor 0 and 100

When creating indexes in SQL Server, if you do not specify an index fill factor, the fill factor will be 0 (effectively the same as 100%).

You can specify an index's fill factor percentage in a number of different ways. Some of these methods include: The Create Index statement, DBCC DBReindex and Rebuild.

ALTER INDEX ALL ON dbo.Data
REBUILD WITH (FILLFACTOR = 90, SORT_IN_TEMPDB = ON,
STATISTICS_NORECOMPUTE = ON)
GO

DBCC DBREINDEX (Data, '', 0)

A few caveats:

In the create statement you cannot specify 0 for fill factor.

In the DBCC DBReindex statement, if you specify the fill factor as zero, this means Reindex the index with the existing index, not 100.

You cannot specify 0 for the fill factor in the Rebuild statement.