Neil Jacobson


Technical Article

Stored Procedure to read tape backup log

If you need to check that the tape back of your database backup files was successful, you would generally read the errorlog for the backup software.If you are just interested in today's results or a particular day's log it can be a pain to get.  You could have a shortcut on the desktop or you […]

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2002-02-10

377 reads

Technical Article

Run a blackbox trace

There is a script for setting up a blackbox trace on SQL 2000 described by Kalen Delaney in "Inside SQL Server 2000". Since I can never remember where to look it up I wrote this simple stored procedure to run the blackbox trace when I need it. This should be used with caution as it […]

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2002-02-05

634 reads

Technical Article

Get list of files from dir and put in table

This stored procedure reads the file names from a directory and stores just the names in a given table. It returns also the number of files present. The sp uses xp_cmdshell and so permissions are restricted to sysadmins and SQLAgentCmdExec. You can test with the following: Create Table ##tmp2 ( fldx nvarchar(255) ) Declare @FilePath […]

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2002-02-01

1,971 reads

Technical Article

Stored procedure to expose information for a file

I wanted to be able to use info about an operating system file in TSQL. So I wrote this stored procedure that uses the special stored procedures xp_fileexist and xp_getfiledetails. This can tell if a file or folder exists, and if it is a file what is its size, created date and time, last written […]

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2002-02-01

1,261 reads

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Estimated Rows

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Comments posted to this topic are about the item Estimated Rows

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Question of the Day

Estimated Rows

I have two calls to the GENERATE_SERIES TVF in this code:

SELECT   TOP 10 gs.value
FROM     GENERATE_SERIES(1, 10) AS gs
ORDER BY NEWID ()
OPTION (RECOMPILE);
go
DECLARE @a int = 10;
SELECT   TOP (@a) gs.value
FROM     GENERATE_SERIES(1, @a) AS gs
ORDER BY NEWID ()
OPTION (RECOMPILE);
In the actual query plans, what is the estimated number of rows for each batch?

See possible answers