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SQL Statistics

Posted on 2004-04-26
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Medium Priority
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Last Modified: 2013-11-13
I want to retrieve the statistics on a table and store them in a different table for historical purposes.
I need things like Row count etc but I do not want to do a count(*) if these values are stored somewhere.
I know one can use DBCC SHOW_STATISTICS but does anyone have any code that simplifies this - in other words loops through all the user tables and get the statistics for them?
or does anyone know where these values are stored.

Thanks
Kathy
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Question by:azrakdragon
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5 Comments
 
LVL 9

Expert Comment

by:_ys_
ID: 10920142
A basic query would be:

SELECT      name, rows
FROM      sysIndexes
WHERE      indid = 0

This returns the table-name and rowcount. Keep in mind that the row count is not guaranteed to be updated real time.
0
 

Author Comment

by:azrakdragon
ID: 10935955
Hi ys

Would this only apply to tables that have indexes on them??
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LVL 9

Expert Comment

by:_ys_
ID: 10936510
I can't imagine a table that doesn't have at least one. I mean when you define a PRIMARY KEY an index (usually clustered) is created on your behalf. Unless your tables don't have a PRIMARY KEY defined, and I would advise against it.
0
 

Author Comment

by:azrakdragon
ID: 10937135
I understand what you are saying, perhaps I should have mentioned I want this information for a data warehouse. Unique columns are defined by Unique indexes but I cannot guarantee that every single table has an index especially our aggregated tables.

What I am ultimately looking for is the information displayed on the "Taskpad" view under Table Info on a database. Surely this kind of information is calculated and stored somewhere or is it calculated on the fly??
Where or how can I get this kind of information.

Regards
Kathy
0
 
LVL 9

Accepted Solution

by:
_ys_ earned 1500 total points
ID: 10937509
In that case COUNT(*) is what you gotta do.

If you're using MS SQL, here's a fully functional script:

---------------x---------------
CREATE TABLE dbo.table_count
(
       table_name NVARCHAR(128) NOT NULL PRIMARY KEY
      ,row_count INTEGER NOT NULL
)

INSERT      dbo.table_count
EXEC      sp_msForEachTable 'SELECT ''?'', COUNT(*) FROM ?'

SELECT      *
FROM      dbo.table_count

DROP TABLE dbo.table_count
---------------x---------------
0

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