Average Row Size For A Table

Aug 21, 2002

I want to find out the average rwo size of a table in sql server 2000. How can i achive this requirment? Please let me know how can i do this?

Thanks & regards,

Dishant Sharma

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Average Size Of A Row In A Table

Feb 20, 2001

How do I find the average size of a row in a table? I need to calculate a row size in a number of tables, then sum those to find the average size of one record ( a hotel guest in this case), which includes entries in a dozen tables.

Thanks

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How To Calculate Average Row Size Of A Record.

Apr 22, 2008

 I want to calculate average row size of a record. By based on this i want to add some more columns into an existing table. Here is my table structureCREATE TABLE patient_procedure(    proc_id int IDENTITY(1,1) CONSTRAINT proc_id_pri_key PRIMARY KEY,    patient_id int NULL,    surgeon_name varchar(40) NOT NULL,    proc_name varchar(20) ,    part_name varchar(30),    wth_contrast int ,    wthout_contrast int ,    wth_wthout_contrast int,    xray_part varchar(60),    arth_area varchar(30),    others varchar(30) ,    cpt varchar(20) ,    procedure_date smalldatetime NOT NULL,    mraloperrun varchar(20),CONSTRAINT patientid_foreign_key FOREIGN KEY(patient_id)    REFERENCES dbo.patient_information (Patient_id)) Now i got a requirement that i have to add two more procedures with different columns.The columns overall size is 195 bytes.I can place those two procedures as seperate tables. I dont want to do that becuase of front end requirements.Here the problem is when the user enters these two procedures information remaining fields will store the  null value. I know that when we store the null values into corresponding columns min of 1 byte will be occupied. Please suggest me that shall i include these columns into the above table. If i add these columns is performance will be decreased or not. Waiting for valuable suggestions. 

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SQL Server Admin 2014 :: Possible To Find Table Size And In That Table Each Row Size

Jun 10, 2014

It is possible to find table size and in that table each row size.

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Analysis :: Calculation Of average Using DAX AVERAGE And AVERAGEX

Jun 21, 2015

Calculation of an average using DAX' AVERAGE and AVERAGEX.This is the manual calculation in DW, using SQL.In the tabular project (we're i've noticed that these 4 %'s are in itself strange), in a 1st moment i've noticed that i would have to divide by 100 to get the same values as in the DW, so i've used AVERAGEX:

Avg_AMP:=AVERAGEX('Fct Sales';'Fct Sales'[_AMP]/100)
Avg_AMPdollar:=AVERAGEX('Fct Sales';'Fct Sales'[_AMPdollar]/100)
Avg_FMP:=AVERAGEX('Fct Sales';'Fct Sales'[_FMP]/100)
Avg_FMPdollar:=AVERAGEX('Fct Sales';'Fct Sales'[_FMPdollar]/100)

The results were, respectively: 701,68; 2120,60...; -669,441; and  finally **-694,74** for Avg_FMPdollar.i can't understand the difference to SQL calculation, since calculations are similar to the other ones. After that i've tried:

test:=SUM([_FMPdollar])/countrows('Fct Sales') AND the value was EQUAL to SQL: -672,17
test2:=AVERAGE('Fct Sales'[_Frontend Margin Percent ACY]), and here, without dividing by 100 in the end, -696,74...

So, AVERAGE and AVERAGEX have a diferent behaviour from the SUM divided by COUNTROWS, and even more strange, test2 doesn't need the division by 100 to be similar to AVERAGEX result.

I even calculated the number of blanks and number of zeros on each column, could it be a difference on the denominator (so, a division by a diferente number of rows), but they are equal on each row.

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Jan 5, 2007

I have two tables, table a holds all the votes by users of each element in table b. I was wondering, how do I get the average of all those votes in table a that relate to that each instance of a element in table b. For example table b has two elements created by a certain user that has been voted 5 times each by users with scores like 2, 5, 4, 2 , 2 for both of them. I just need to get the average of those numbers that pertain to those elements in table b. Thanks for any help.  

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Nov 30, 2011

how to average the best X of Y records in a table for each member. Here's what I have for columns:

Member_ID
Year
Month
MonthlySpend (summary value for month)

Basically, I'm trying to find out the average monthly spend for each member's best 4 of the last 6 months (the best months will vary by member of course). I thought this would be simple (and maybe it is) but I am having difficulty figuring this out. I'm using MS SQL 2000.

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May 19, 2008

So I have this table called "listings"... there are 100 unique listings with an integer ID for each.

I have another table called "ratings"... in there are multiple entries that have a listing_id field and a rating field. The rating field is a value from 0-10.

I want to select ALL "listings" from the listings table... and then sort based on the average number that the multiple rating fields in the ratings table has for that listing.

I CAN NOT figure it out!! Any help would be greatly appreciated. Please respond if I have not explained this properly. Thanks in advance.

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Feb 15, 2008

I have a temp_max column and a temp_min column with data for every day for 60 years. I want the average temp for jan of yr1 through yr60, averaged...
I.E. the avg temp for Jan of yr1 is 20 and the avg temp for Jan of yr2 is 30, then the overall average is 25.
The complexity lies within calculating a daily average by month, THEN a yearly average by month, in one statement.
?confused?

Here's the original query.
accept platformId CHAR format a6 prompt 'Enter Platform Id (capital letters in ''): '

SELECT name, country_cd from weather_station where platformId=&&platformId;

SELECT to_char(datetime,'MM') as MO, max(temp_max) as max_T, round(avg((temp_max+temp_min)/2),2) as avg_T, min(temp_min) as min_temTp, count(unique(to_char(datetime, 'yyyy'))) as TOTAL_YEARS
FROM daily
WHERE platformId=&&platformId and platformId = platformId and platformId = platformId and datetime=datetime and datetime=datetime
GROUP BY to_char(datetime,'MM')
ORDER BY to_char(datetime,'MM');

with a result of:

NAME_________________CO
-------------------- --
OFFUTT AFB___________US

MO______MAX_T _____AVG_T__MIN_TEMTP_TOTAL_YEARS
-- ---------- ---------- ---------- -----------
01_________21______-5.31________-30__________60
02_________26______-2.19______-28.3__________61
03_______31.1_______3.61______-26.1__________60
04_______35.6______11.07______-12.2__________60
05_______37.2_______17.2_______-3.3__________60
06_______41.1______22.44__________5__________60
07_______43.3______24.92________7.2__________60
08_______40.6______23.71________5.6__________60
09_________40______18.84_______-2.2__________59
10_______34.4_______12.5_______-8.9__________59
11_________29_______4.13______-23.9__________60
12_________21______-2.52______-28.3__________60

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I need to figure out the correct update statement syntax for the following integration.

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In a "Averages Table" i have every weekenddate for each store populated. So 52 Weeks for 10 stores = 520 Rows of Store numbers & WeekendDates.

What i would like to do is run a loop or update statement which would update the store average for each weekendate based on the last 13 weeks.

This is my query

update performancestore_avgs set SalesAvg =
(select sum(SalesHit)/Count(Store) from performance_store where performance_store.weekenddate >= performancestore_avgs.weekenddate-84 and performancestore_Avgs.store = performance_store.store)

The update statement runs but the averages are completely wrong.

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Jul 23, 2005

Hi,I'm am looking for a little help. I need to create a SQL view whichjoins a few tables, and I need to return an average for a particularcolumn where a second duplicate ID exists...Heres an example of how the results could be returned...ID | Name | Order No. | Value---+------+-----------+---------5 | test | 1234 | 35 | test2| 1234 | 45 | test3| 1234 | 35 | void | 1235 | 55 | void2| 1235 | 65 | void3| 1235 | 55 | void4| 1235 | 7ID is my main join which joins the tablesName is a unique nameOrder No is the same for the different names, I only need to return onerow with this order no, and the first name (the rest are irrelevant)Value is the field which I wish to return as an average of all 3, 4 orhowever many rows is returned and share the same order no. This iswhere I get totally lost as I am pretty new to SQL. Can anyone provideany help on how I would go about limiting this query to the uniqueorder no's and returning the average of the value field, and I can takeit from there with my own tables.Thanks for your helpstr8

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Mar 2, 2008

Hi,
i use this script that show me the size of each table and do the sum of all the table size.

SELECT
X.[name],
REPLACE(CONVERT(varchar, CONVERT(money, X.[rows]), 1), '.00', '') AS [rows],
REPLACE(CONVERT(varchar, CONVERT(money, X.[reserved]), 1), '.00', '') AS [reserved],
REPLACE(CONVERT(varchar, CONVERT(money, X.[data]), 1), '.00', '') AS [data],
REPLACE(CONVERT(varchar, CONVERT(money, X.[index_size]), 1), '.00', '') AS [index_size],
REPLACE(CONVERT(varchar, CONVERT(money, X.[unused]), 1), '.00', '') AS [unused]
FROM
(SELECT
CAST(object_name(id) AS varchar(50)) AS [name],
SUM(CASE WHEN indid < 2 THEN CONVERT(bigint, [rows]) END) AS [rows],
SUM(CONVERT(bigint, reserved)) * 8 AS reserved,
SUM(CONVERT(bigint, dpages)) * 8 AS data,
SUM(CONVERT(bigint, used) - CONVERT(bigint, dpages)) * 8 AS index_size,
SUM(CONVERT(bigint, reserved) - CONVERT(bigint, used)) * 8 AS unused
FROM sysindexes WITH (NOLOCK)
WHERE sysindexes.indid IN (0, 1, 255)
AND sysindexes.id > 100
AND object_name(sysindexes.id) <> 'dtproperties'
GROUP BY sysindexes.id WITH ROLLUP) AS X
ORDER BY X.[name]

the problem is that the sum of all tables is not the same size when i make a full database backup.
example of this is when i run this query against my database i see a sum of 111,899 KB that they are 111MB,but when
i do full backup to that database the size of this full backup is 1.5GB,why is that and where this size come from?

THX

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ALTER DATABASE <DBNAME> MODIFY FILE ( NAME = <DBLOGFILENAME, SIZE = 2 ) "



And I'm getting "MODIFY FILE failed. Specified size is less than current size." I tried going into the database properties and setting the log file to 2M, but it doesn€™t keep the changes.



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Mar 1, 2002

I have some question and would like ask experts:

The largest table in our database eats up above 4G . we do "sp_spaceused" for this table.The length of all columns of this table ( just int, char, varchar, money ,numeric fields types) is about 200 bytes, and the table has around 1,300,000 rows, but the reserved spaced for this table is 4,800,000kb and the data space is around 4,600,00kb.

How can average each row take 3.7kb ( the total size of all columns just 200 bytes)? Any other things I need check?
Any one can give any suggestion what cause this problem? or it is normal?

Thank you very much.

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May 18, 2001

Hello, Everyone,

Can anyone tell me how to find the size of a table in a DB?

Thanks,

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I am wondering if there is the limitation of maximum table size in SQL 6.5. I have a table with 2.6GB and 12,000,000 rows in SQL 6.5 database. Is this a problem?

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Jan 14, 1999

hello all,

I am trying to solve this problem for quite some time.. I was wondering if I can get some help..

These questions are all abt. MSSQL 6.5

1. Is there a limit on the size of the table ?
2. Does it make sense to have more tables if the size of the row size is more that the limit set by 6.5 or i should let have more rows in a different table with duplicate entries for a particular field.
3. What is the number of rows before the performance of a query starts getting affected..

Thanks..

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Aug 26, 2002

I created a same table on two different server with same data. I run sp_sapceuse on both server and I got following result

it's useing 392 MB for table
name rows reserved data index_size unused
-------------------------------------------------------------------------------------------------------------------------------- ----------- ------------------ ------------------ ------------------ ------------------
DUNS_SITE 100000 401288 KB 400000 KB 1264 KB 24 KB

its using only 97.3 MB

name rows reserved data index_size unused
-------------------------------------------------------------------------------------------------------------------------------- ----------- ------------------ ------------------ ------------------ ------------------
DUNS_SITE 100000 99720 KB 99376 KB 328 KB 16 KB


WHY?????

Thanks
Manesh

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index_size
unused

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Hello,

If i want to know the size of table then how can i do it in SQL Server 2000 and in SQL Server 2005.

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Hi,
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thanks
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