Which Data Types Can Create Statistics?

Raul Gonzalez figures out which data types cannot be part of statistics:

Yeah, there you go, all these _WA_Sys_ stats tell me they have been automatically created (there is a flag in sys.stats if you don’t believe me) but I can see there are only 31, where I created 34 columns.

That’s funny, let’s see which data types did get statistics.

The results are pretty interesting.

Related Posts

Custom Statistics Block Column Alteration DDL

Max Vernon demonstrates that custom statistics and prevent you for modifying a column: Interestingly, if SQL Server has auto-created a stats object on a column, and you subsequently modify that column, you receive no such error. SQL Server silently drops the statistics object, and modifies the column. The auto-created stats object is *not* automatically recreated […]

Read More

What’s Special About stats_id = 1

Wayne Sheffield explains what makes stats_id = 1 special, as well as a relationship between stats_id and index_id in SQL Server: If you were to look at sys.indexes, you would see that these two indexes use index_id values of 1 and 3. The value 2 is skipped. It’s not because there used to be an […]

Read More

Categories

February 2017
MTWTFSS
« Jan Mar »
 12345
6789101112
13141516171819
20212223242526
2728