Mark Tillman


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Writing Parquet Files – #SQLNewBlogger

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Recently I’ve been looking at archiving some data at SQL Saturday, possibly querying it,...

A word about IT/cybersecurity and mental health

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Just as it's important to take care of our physical health (and I'm guilty...

Are ABORT_AFTER_WAIT's victims logged?

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In SQL Server, using the KILL command to terminate a session results in an...

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Multiple deadlocks occurring with contentious code

By zoggling

We are seeing multiple frequent deadlocks occurring with the following extract of code, which...

I have few snapshot transactions, now i need to put noloc in all tables.

By rajemessage 14195

I have few snapshot transactions , now my admin has informed me that put...

Kubernetes is Cool, But ...

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Kubernetes is Cool, But ...

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Question of the Day

Multiple Query Trace Flags

I want to enable two trace flags, 4199 and 4137, for a single query. How should I do this:

-- A
SELECT
  a.AddressID
, a.AddressLine1
, a.AddressLine2
, a.City
, a.StateProvinceID
, a.PostalCode
, p.FirstName
, p.LastName
FROM
  Person.Address a
  INNER JOIN person.Person AS p
    ON p.rowguid = a.rowguid
WHERE
  City           = 'SEATTLE'
  AND PostalCode = 98104
OPTION (QUERYTRACEON 4199, 4137);

-- B
SELECT
  a.AddressID
, a.AddressLine1
, a.AddressLine2
, a.City
, a.StateProvinceID
, a.PostalCode
, p.FirstName
, p.LastName
FROM
  Person.Address a
  INNER JOIN person.Person AS p
    ON p.rowguid = a.rowguid
WHERE
  City           = 'SEATTLE'
  AND PostalCode = 98104
OPTION (QUERYTRACEON 4199, QUERYTRACEON 4137);

-- C
SELECT
  a.AddressID
, a.AddressLine1
, a.AddressLine2
, a.City
, a.StateProvinceID
, a.PostalCode
, p.FirstName
, p.LastName
FROM
  Person.Address a
  INNER JOIN person.Person AS p
    ON p.rowguid = a.rowguid
WHERE
  City           = 'SEATTLE'
  AND PostalCode = 98104
OPTION (QUERYTRACEON 4199), (QUERYTRACEON 4137);

See possible answers