SQL Server useful but less known features

  • Posted on: 2 November 2016
  • By: Michał Turecki

  1. Checking who is connected to the database

    sp_who

    SELECT
    NULL as [Connections by Database],
    [host_name] AS [Client Machine],
    db.name AS [Database],
    [program_name] AS [Client Program],
    COUNT(*) AS [Open Connections]
    FROM sys.dm_exec_sessions s (nolock)
    LEFT JOIN sys.dm_exec_requests r (nolock) ON r.session_id = s.session_id
    LEFT JOIN sys.databases db (nolock) ON db.database_id = r.database_id
    WHERE s.session_id >= 50 -- Ignore SQL Server processes
    GROUP BY [host_name], db.name, [program_name]
    ORDER BY [Client Machine], [Database], [Client Program]

  2. Adjusting connection pooling settings

    By default pool size is 100 per database with a command timeout (effectively a connection timeout) of 15 seconds. To increase add following to the connection string:

    Connection Timeout=30;Pooling='true';Max Pool Size=200

  3. Checking the size of column's contents

    To check how much data the column contains:

    SELECT *, DATALENGTH([column]) AS ColumnSizeInBytes FROM table

  4. Using SQL Server profiler

    Profiler is a powerful way to debug application performance problems, to check query execution time. If you're developing any application using SQL Server as a database, running it at least once for every application release can help with pinpointing possible performance issues. Remember the rule - there should be a constant number of queries regardless of the amount of records fetched - that way application will scale better. Sometimes it's better to replace a single complex query with more simpler queries because for each result row, columns shared by joins are repeated and delivered to client for processing many times.

Tags: 
programming
SQL
databases
sql-server

Comments

gzaqpqzgtd (not verified)

Tue, 01/10/2019 - 19:00

cialis usa side effects of nexium cialis vs viagra

gzaqpqzgtd (not verified)

Tue, 01/10/2019 - 18:57

cialis usa side effects of nexium cialis vs viagra

gvwxtikzir (not verified)

Tue, 01/10/2019 - 17:42

cialis from canada tadalafil tablets 20 mg acheter cialis

gvwxtikzir (not verified)

Tue, 01/10/2019 - 17:35

cialis from canada tadalafil tablets 20 mg acheter cialis

ceyyssrrda (not verified)

Tue, 01/10/2019 - 15:59

generic cialis online buy cialis cialis daily

ceyyssrrda (not verified)

Tue, 01/10/2019 - 15:56

generic cialis online buy cialis cialis daily

ceyyssrrda (not verified)

Tue, 01/10/2019 - 15:54

generic cialis online buy cialis cialis daily

ceyyssrrda (not verified)

Tue, 01/10/2019 - 15:50

generic cialis online buy cialis cialis daily

Brettirrix (not verified)

Mon, 30/09/2019 - 10:48

do men use viagra for porn movies

Stewartskist (not verified)

Mon, 30/09/2019 - 03:43

levitra generic available 60 mg
benefits of taking cialis and giseng together?
propecia cost walmart
tetracycline 500mg for sale
metformin 1,000 mg

Brettirrix (not verified)

Sat, 28/09/2019 - 13:31

propecia 1 mg precio

Brettirrix (not verified)

Fri, 27/09/2019 - 05:12

lexapro ask a patient
oral prednisone and alcohol
acyclovir injection price
xenical venta online
can i get a cialis prescription online
allopurinol without prescription
furosemide generic name
buy ventolin hfa online without prescription
allopurinol 100 mg is non prescription
cialis 10 mg precio walmart
side effects of lexapro 20 mg
sildenafil citrate otc
can sunlight interact with valtrex
is viagra available genericallyt
buy levitra online 24 hours

Brettirrix (not verified)

Fri, 27/09/2019 - 04:42

tetracycline 250 mg uses

Michelebuh (not verified)

Tue, 24/09/2019 - 09:56

- Проверить транспорт «вживую». После выбора авто по снимкам из каталога, его необходимо проверить на наличие возможных отклонений: внешний вид, салон, дополнительные аксессуары и т.д.;
Торопитесь оформить заказ - лимузин на свадьбу Одесса по специальной цене, ведь наши люксовые машины расхватывают как горячие пирожки! Не упустите свой шанс!
Лимузин на свадьбу Одесса Excallibur Phantom.
Прокат лимузинов Одесса Lincoln Towncar 2008.
Авто на свадьбу Одесса Ferrari F 430.

лимузин аренда красноярск цены

прокат лимузина водителем 46018f0

Michelebuh (not verified)

Tue, 24/09/2019 - 09:52

- Проверить транспорт «вживую». После выбора авто по снимкам из каталога, его необходимо проверить на наличие возможных отклонений: внешний вид, салон, дополнительные аксессуары и т.д.;
Торопитесь оформить заказ - лимузин на свадьбу Одесса по специальной цене, ведь наши люксовые машины расхватывают как горячие пирожки! Не упустите свой шанс!
Лимузин на свадьбу Одесса Excallibur Phantom.
Прокат лимузинов Одесса Lincoln Towncar 2008.
Авто на свадьбу Одесса Ferrari F 430.

лимузин аренда красноярск цены

прокат лимузина водителем 46018f0

Michelebuh (not verified)

Tue, 24/09/2019 - 09:44

- Проверить транспорт «вживую». После выбора авто по снимкам из каталога, его необходимо проверить на наличие возможных отклонений: внешний вид, салон, дополнительные аксессуары и т.д.;
Торопитесь оформить заказ - лимузин на свадьбу Одесса по специальной цене, ведь наши люксовые машины расхватывают как горячие пирожки! Не упустите свой шанс!
Лимузин на свадьбу Одесса Excallibur Phantom.
Прокат лимузинов Одесса Lincoln Towncar 2008.
Авто на свадьбу Одесса Ferrari F 430.

лимузин аренда красноярск цены

прокат лимузина водителем 46018f0

Michelebuh (not verified)

Tue, 24/09/2019 - 09:42

- Проверить транспорт «вживую». После выбора авто по снимкам из каталога, его необходимо проверить на наличие возможных отклонений: внешний вид, салон, дополнительные аксессуары и т.д.;
Торопитесь оформить заказ - лимузин на свадьбу Одесса по специальной цене, ведь наши люксовые машины расхватывают как горячие пирожки! Не упустите свой шанс!
Лимузин на свадьбу Одесса Excallibur Phantom.
Прокат лимузинов Одесса Lincoln Towncar 2008.
Авто на свадьбу Одесса Ferrari F 430.

лимузин аренда красноярск цены

прокат лимузина водителем 46018f0

Brettirrix (not verified)

Mon, 23/09/2019 - 19:03

buy allopurinol online uk
xenical
tadalafil 5mg coupon
propecia site:ebay.com
is viagra dose weight dependent
is kamagra better than generic viagra?
sildenafil sandoz 50 mg precio
t3 prescription
who manufacturers sildenafil
how much does it cost to get a propecia prescription
ventolin inhaler buy online
cafergot without a prescription
tetracycline generic name
compare tadalafil with generic
interactions for levitra

Brianabipt (not verified)

Sun, 22/09/2019 - 08:01

watch a lot of MILF sex videos at http://milfporno.space

Brianabipt (not verified)

Sun, 22/09/2019 - 07:52

watch a lot of MILF sex videos at http://milfporno.space

Stewartskist (not verified)

Sat, 21/09/2019 - 18:58

tadalafil lowest price

Brettirrix (not verified)

Fri, 20/09/2019 - 00:45

define ventolin
can too much lasix cause tremors
new york physician for generic sildenafil
repeated outbreaks after stoppin valtrex
tadalafil 5 mg daily generic best prices
doxycycline wine
how long before cialis starts working
kamagra oral jelly canada
antabuse 400 mg tablets
tadalafil from india
lexapro jitters
tetracycline bacteremia
tadalafil troche 20mg effects
how much is 60 mg
can i purchase tadalafil tablets???

Ellarem (not verified)

Fri, 13/09/2019 - 10:14

Abuso De Kamagra Baclofene Nantes Buy Nosipren Prednisone 20mg Priligy Revenue

Cindyram (not verified)

Sun, 08/09/2019 - 14:48

discount cialis cialis generic cialis online

Cindyram (not verified)

Sun, 08/09/2019 - 14:44

discount cialis cialis generic cialis online

Cindyram (not verified)

Sun, 08/09/2019 - 14:35

discount cialis cialis generic cialis online

Cindyram (not verified)

Sun, 08/09/2019 - 14:34

discount cialis cialis generic cialis online

Cindyram (not verified)

Sun, 08/09/2019 - 12:57

generic cialis lipitor medication cialis 10mg

Cindyram (not verified)

Sun, 08/09/2019 - 12:55

generic cialis lipitor medication cialis 10mg

Cindyram (not verified)

Sun, 08/09/2019 - 12:55

generic cialis lipitor medication cialis 10mg

Cindyram (not verified)

Sun, 08/09/2019 - 12:54

generic cialis lipitor medication cialis 10mg

Cindyram (not verified)

Sun, 08/09/2019 - 11:21

cialis without a prescription sildenafil citrate order cialis

Cindyram (not verified)

Sun, 08/09/2019 - 11:17

cialis without a prescription sildenafil citrate order cialis

Cindyram (not verified)

Sun, 08/09/2019 - 11:15

cialis without a prescription sildenafil citrate order cialis

Cindyram (not verified)

Sun, 08/09/2019 - 11:13

cialis without a prescription sildenafil citrate order cialis

RandyJex (not verified)

Wed, 04/09/2019 - 21:45

If you’re upset about your weight and want to lose a little more, get this…

An overweight mother with pre-diabetes has just SHOCKED the medical
community by losing an unheard of 22lbs pounds in just 13 days…

....Without starving herself, she lost a total of 37lbs in the first month!
-> CLICK HERE to see her Transformation Pics!

...Even without exercising, she went on to burn off 84lbs (almost a pound a day)
and eliminated any sign of diabetes or any other life-ending diseases.

And the amazing thing is…

All she did was this D.I.Y. “carb-pairing” trick that reconditions your 3 female
weight-loss hormones to drastically accelerate fat-burning while still eating the
foods you love.

Check it out for yourself…

“Carb-Pairing” Melts Away 37 Pounds in Just 20 Days (WOMEN ONLY)

Enjoy!

RandyJex (not verified)

Wed, 04/09/2019 - 21:40

If you’re upset about your weight and want to lose a little more, get this…

An overweight mother with pre-diabetes has just SHOCKED the medical
community by losing an unheard of 22lbs pounds in just 13 days…

....Without starving herself, she lost a total of 37lbs in the first month!
-> CLICK HERE to see her Transformation Pics!

...Even without exercising, she went on to burn off 84lbs (almost a pound a day)
and eliminated any sign of diabetes or any other life-ending diseases.

And the amazing thing is…

All she did was this D.I.Y. “carb-pairing” trick that reconditions your 3 female
weight-loss hormones to drastically accelerate fat-burning while still eating the
foods you love.

Check it out for yourself…

“Carb-Pairing” Melts Away 37 Pounds in Just 20 Days (WOMEN ONLY)

Enjoy!

RandyJex (not verified)

Wed, 04/09/2019 - 21:37

If you’re upset about your weight and want to lose a little more, get this…

An overweight mother with pre-diabetes has just SHOCKED the medical
community by losing an unheard of 22lbs pounds in just 13 days…

....Without starving herself, she lost a total of 37lbs in the first month!
-> CLICK HERE to see her Transformation Pics!

...Even without exercising, she went on to burn off 84lbs (almost a pound a day)
and eliminated any sign of diabetes or any other life-ending diseases.

And the amazing thing is…

All she did was this D.I.Y. “carb-pairing” trick that reconditions your 3 female
weight-loss hormones to drastically accelerate fat-burning while still eating the
foods you love.

Check it out for yourself…

“Carb-Pairing” Melts Away 37 Pounds in Just 20 Days (WOMEN ONLY)

Enjoy!

LarryJourn (not verified)

Wed, 04/09/2019 - 17:23

online pharmacy tech programs with financial aid cheap online pharmacy canada drugs coupon code

LarryJourn (not verified)

Wed, 04/09/2019 - 17:20

online pharmacy tech programs with financial aid cheap online pharmacy canada drugs coupon code

LarryJourn (not verified)

Wed, 04/09/2019 - 17:17

online pharmacy tech programs with financial aid cheap online pharmacy canada drugs coupon code

LarryJourn (not verified)

Wed, 04/09/2019 - 17:09

online pharmacy tech programs with financial aid cheap online pharmacy canada drugs coupon code

Haroldguics (not verified)

Wed, 04/09/2019 - 11:42

pharmacy technician classes online prescription drugs online pharmacy technician class online

Haroldguics (not verified)

Wed, 04/09/2019 - 11:39

pharmacy technician classes online prescription drugs online pharmacy technician class online

Haroldguics (not verified)

Wed, 04/09/2019 - 11:32

pharmacy technician classes online prescription drugs online pharmacy technician class online

Haroldguics (not verified)

Wed, 04/09/2019 - 11:29

pharmacy technician classes online prescription drugs online pharmacy technician class online

LarryJourn (not verified)

Mon, 02/09/2019 - 08:49

pharmacy degrees online pharmacy tech schooling online online pharmacy viagra

LarryJourn (not verified)

Mon, 02/09/2019 - 08:43

pharmacy degrees online pharmacy tech schooling online online pharmacy viagra

Josephmaymn (not verified)

Mon, 02/09/2019 - 08:42

mexican online pharmacy cvs pharmacy online online pharmacy viagra

Josephmaymn (not verified)

Mon, 02/09/2019 - 08:41

mexican online pharmacy cvs pharmacy online online pharmacy viagra

Pages