SQL Server 2008 :: Calculating Median Over 2 Columns?

Aug 13, 2015

I have a database with 1million+ records in and i'm trying to collect the median values of column(2) for all distinct values in column (1)

Example DB:

Column 1 Column 2
978555 500
978555 502
978555 480
978555 490
978324 1111
978324 1102
978311 122
978311 120
978994 804
978320 359

and I need it to display on SELECT as

column 1 column 2
978555 495
978324 1106
978311 121
978994 804
978320 359

Is this possible on 2008 R2?

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Calculating Median In SQL

Aug 25, 2004

Hi All,
I have a table that of server names and their execution times that run in to hundreds of thousands of records. What i need is some SQL that gives me the median execution times for each of these different servers. At the moment i have some SQL that only gives me the median for all the records in the table not the median execution time for every different server name. For example my tables looks something like this;

ServerName | ExecTime
server1 | 0.07
server2 | 0.17
server1 | 0.27
server1 | 0.37
server2 | 0.47
server1 | 0.57
server1 | 0.67
server2 | 0.77

My SQL below gives me

ServerName | ExecTime
server1 | 0.37

Where as i want

ServerName | ExecTime
server1 | 0.37
server2 | 0.47

Here is my SQL, hope someone can modify it and thanks in advance.


SELECT DISTINCT instance, exec_time AS median
FROM (SELECT instance, exec_time
FROM (SELECT TOP 1 exec_time = exec_time * 1.0, instance
FROM (SELECT TOP 50 PERCENT exec_time, instance
FROM llserverlogs
ORDER BY exec_time) sub_a
ORDER BY 1 DESC) sub_1
SELECT instance, exec_time
FROM (SELECT TOP 1 exec_time = exec_time * 1.0, instance
FROM (SELECT TOP 50 PERCENT exec_time, instance
FROM llserverlogs
ORDER BY exec_time DESC) sub_b
ORDER BY 1) sub_2)

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Calculating Median Value From Measures And Dimensions

May 24, 2007

I am facing some problem in calculating Median

I am trying to calculate the median value using one of the measures and a dimension value.

Time is a measure in my cube and OpId is one of the dimensions.The result is as follows:

opid time median

1 55

2 23

3 23

Total 23

The Time here for Op Id 1 is the aggregation for all the rows whose OpId is 1.I want the median of the values whose OpId is 1 which is not showing at the moment.

What I am getting here is the median for all of the OpId but what I really want is the median for each of the individual Opid's as well.

I am using a calculated field Median with the following expression.


( [Dim Operation].[Dim Operation].currentmember.children ,[Measures].[Elapsed Time])


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Calculating Median Values On Column In A Table

Feb 19, 2012

I need to calculate a median on a column in a table. The code I have is:

Select gender,
when gender = 'F' then 'Female'
when gender = 'M' then 'Male'
else 'Unknown'
end as test,
datediff(day, [admit_date], getdate()) as 'datediffcal',
from [tbl_record]
How do I calculate the median on the datediffcal column?

It doesn't matter if the resultset only shows the median result. So if the output shows:


that's fine. Minimally, I need the median value.

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Analysis :: Calculating A Rolling Median Over A Period Of 3 Years?

Jun 17, 2015

calculating a rolling median over a period of 3 years.

I already calculate median and I've tried to calculate rolling median over a period of 3 years as below.


What this does is, it calculates the median of the medians over the period of 3 years. But, what I'm looking for is the overall median of the underlying measure over a period of 3 years.

What I have now:

Year1 - 41,52,73;  Median1 - 52
Year2 - 6,9,12;  Median2- 9
Year3 - 24,68,89; Median3 - 68
Overall Median of 9,52,68 - 52

What I need:

Year1 - 41,52,73;  Median1 - 52
Year2 - 6,9,12;  Median2- 9
Year3 - 24,68,89; Median3 - 68

Overall Median of 41,52,73,6,9,12,24,68,89 is 41 

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Simulating Median On Table Columns In SQLserver2000

Apr 22, 2004


I have a an sql table having 10,000 Rows.

The table has 5 columns. They are S1,S2,S3,S4 and M

I need the best way to calculate the MEDIAN for each row and store it in M. i.e. M=median(S1,S2,S3,S4)

I've come across articles where they've calculated medians on table rows, not table columns. But my requirement involves table columns. I guess transposing the columns into rows and then calculating median should be possible, but if I do that for 10000 rows using a cursor, then it would take a loooooong time.

Please suggest the best way to counter this



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Transact SQL :: Multiple Columns Needs Median Calculation

Oct 27, 2015

I need to get the median for the 10 columns in my table. For the sake of example, I've reduced it to 2 columns. 

The code below works perfectly if i compute for only 1 column and certainly doesn't for multiple columns.

Is there a way to better handle the median computation in one pass, if multiple columns are involved?

DECLARE @tbl as table (id_n int, col1 int, col2 int)
insert into @tbl
values (1, 1, 2), (1,3, 4), (1, 5, 7), (2, 4, 7), (2, 7, 7), (2, 3, 5), (2,5, 5), (3, 1, 2), (3, 3, 5), (3, NULL,11)
select *
from @tbl
order by id_n, col1

[Code] .....

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Calculating The Sum Of Columns...

Oct 31, 2006

It may be simple question, but how can i get the sum of column? with conditions like getting the some of clicks one user send and so...

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Calculating Difference Between Two Columns

Feb 12, 2014

To calculate how many months are between the current date minus the First_Post_Date

For example
The First_Post_Date is displayed as follows following “25/07/2012”

Current date is 12-02-2014

The difference between the two dates is approx 20 months ..To make the calculation easier, it might be easier to default the day of First_Post_Date to 01 and do the same with the currentdate

So it would be 01/07/12 and 01/02/14

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Problem Calculating The Division Of 2 Columns

Apr 20, 2008

I have 2 tables

table1 which gives the schedule for day
id sat sun mon tue wed thu fri
1 40 50 35 75 80 90 95
2 30 40 45 45 95 85 45
3 40 50 25 25 75 75 55
4 50 60 35 55 65 65 65
5 70 35 75 65 30 35 70

table2 which gives total schedule for week
id week
1 500
2 600
3 550
4 450
5 650

i want to calculate to percentage schedule for each day for week for each value in id column

something like
sat/week where table1.id = table2.id

what im doing is
select (sat/week)
from table1
inner join table2
on table1.id = table2.id
group by id

its giving me error because im using group by clause

what can i do ??
please help

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Calculating Percentages And Showing In Separate Columns

Aug 31, 2013


[Code] ....

In the above query i need to calculate 100%,30% and percentage other than 100 and 30 and show them in separate columns how to do that?




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SQL Server 2008 :: Using Decimal Columns In SUM Function

Jul 21, 2015

Recently I have come across a requirement where i need to design a table.

There are some columns in table like below with DECIMAL Datatype:




Based on my knowledge, i know that values before Floating-Point will not be more than 4 digits.

Now as per MSDN,

Precision => 1 - 9
Storage bytes => 5

so i can create column as:

BldgLengthDECIMAL(6,2) DEFAULT 0


BldgLengthDECIMAL(9,2) DEFAULT 0

Now while reading some articles, i came to know that when we do some kind of operation like SUM Or Avg, on above column then result might be larger than current data type.

So some folks suggested me that i should keep some extra space/digits considering above MATH functions, to avoid an Arithmetic Over Flow error.

So my question is what should be value of DataType for above column ?

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SQL Server 2008 :: Joining Two Columns To Same Table?

Aug 17, 2015

I have two tables: "Users" and "Messages".

The Messages table has a "UserFromID" and an "UserToID", indicating a message was sent from a user to a user.

The Users table has a UserID, FirstName, LastName and UserGroup.

Im trying to get all messages sent by or to a user in a specific group, with the First and Last names of the sending and receiving users.

Here is my tables and data:

CREATE TABLE tmp_users (userID INT, GroupID INT, UserName VARCHAR(10), FullName VARCHAR(100))
CREATE TABLE tmp_Messages (aKey INT IDENTITY, FromUserID INT, ToUserID INT, msg VARCHAR(100))
INSERT INTO tmp_users VALUES (1,1,'John','John Smith')
INSERT INTO tmp_users VALUES (2,1,'Jane','Jane Doh')
INSERT INTO tmp_users VALUES (3,1,'Bob','Bob Newheart')


The query Im running so far is wrong, but here it is...

SELECT t.FromUserID, t.ToUserID, t.msg, u.UserName AS UserFrom,
u.GroupID AS FromGroup, u2.UserName AS UserTo, u2.GroupID AS ToGroup
FROM tmp_Messages t
LEFT JOIN (SELECT UserID, GroupID, UserName FROM tmp_users WHERE GroupID = 3) u

[Code] .....

im missing the details of one of the users.I know what the problem is, I just cant figure out how to get this working without using temp tables, which I cant do in the production version.

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SQL Server 2008 :: How To Use Like Operator To Get Multiple Columns

Sep 12, 2015

how to use like operator select statement to retrieve multiple column names in sql server DB...for ex: I have a table say employees where in I want to get all column names like emp_,acc_ etc using '%' And what is this below query used for?

SELECT column_name as 'Column Name', data_type as 'Data Type',
character_maximum_length as 'Max Length'
FROM information_schema.columns
WHERE table_name = 'tblUsers'

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SQL Server 2008 :: Transpose Columns To Rows?

Oct 29, 2015

I am struggling with doing what should be a fairly simply transpose of columns to rows. I have found some examples but nothing I could get working.

I have data in the form of:

Brand, Model, Color1, Color2, Color3, Color4, Color5, Color6
Honda, Accord, Red, Grey, Black, White,,,
Toyota, Corolla, White, Black,,,,,

The output should look like:

Brand, Model, Color
Honda, Accord, Red
Honda, Accord, Grey
Honda, Accord, Black
Honda, Accord, White
Toyota, Corolla, White
Toyota, Corolla, Black

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SQL Server 2008 :: How To Encrypt Either Columns Or Tables

Nov 2, 2015

how to encrypt a either columns or tables in SQL server (2008 R2).

Do I need to encrypt a whole table of can I encrypt certain columns of a table ?

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Reporting Services :: Calculating Difference Between Columns Within Column Group

Jun 15, 2015

Given the attached report, is there an easy way of calculating the difference between the Today and QTR Start column? Because of the Account Group, the report looks like the sample shown on the second image.

Sample report:

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SQL Server 2008 :: Exclude Columns When Using Bulk Insert?

Dec 28, 2013

I'm able to successfully import data in a tab-delimited .txt file using the following statement.

BULK INSERT ImportProjectDates FROM "C: mpImportProjectDates.txt"

However, in order to import the text file, I had to add columns to the text file to match the columns that exist in the table. The original file is an export out of another database and contains all but 5 columns from my db.

How would I control which column BULK INSERT actually imports when working with a .txt file? I've tried using a FORMAT FILE, however I kept getting errors which I tracked down to being a case of not using it with a .txt file.

Yes, I could have the DBA add in the missing columns to the query from the other DB to create the columns, however I'd like to know a little bit more about this overall.

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SQL Server 2008 :: InPlace Update For Included Columns

Oct 8, 2014

The Delete-Insert update happens for key columns of Indexes and that makes sense.

But I am confused that why Delete-Insert update happens for Included columns of nonclustered indexes, where I expected them to be InPlace updates ???

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SQL Server 2008 :: Return A Single Table With Three Columns

Jan 26, 2015

I have multiple databases in the server and all my databases have tables: stdVersions, stdChangeLog. The stdVersions table have field called DatabaseVersion which stored the version of the database. The stdChangeLog table have a field called ChangedOn which stored the date of any change made in the database.

I need to write a query/stored procedure/function that will return all the database names, version and the date changed on. The results should look something like this:

DatabaseName DatabaseVersion DateChangedOn
OK5_AAGLASS 2015/01/12
OK5_SHOPRITE 2015/01/10
OK5_SALDANHA 2014/12/23

The results should be ordered by DateChangedOn.

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SQL Server 2008 :: Concatenating Multiple Rows (Certain Columns)

Jan 29, 2015

Currently I have a table that looks like the one below and I need to concatenate the description column and keep the rest of the row the same.

IDSeq Desc DateOpen DateClose
1 AA description 1 1/1/2015 12/31/2015
1 AB description 2 1/1/2015 12/31/2015

Desired outcome:
ID Desc DateOpen DateClose
1 description 1,description 2 1/1/2015 12/31/2015

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SQL Server 2008 :: Append Records With Different Number Of Columns?

Feb 16, 2015

I have a table of Customers & their data in about 20 Columns.

I have another table that has potential Customers with 3 Columns.

I want to append the records from Table 2 onto Table 1 to the Columns with the same names.

I've thought of using UNION ALL or Select Insert but I'm mainly stuck on the most efficient way to do this.

There is also no related field that can be used to join the data as these Customers in table 2 have no Customer ID yet as they're only potential Customers.

Can I just append the 3 columns from Table 2 to the same 3 columns in table 1?

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SQL Server 2008 :: Identify Columns And / Or Tables From Records

Mar 3, 2015

I'm using MS SQL Server 2008 and I'm trying to figure out if it is possible to identify what tables / columns contain specific records.

In the example below information generated for the end user, so the column headers (Customer ID, Customer, Address, Phone, Email, Account Balance, Currency) are not necessarily the field names from the relevant tables, they are simply more identifiable headers for the user.

Customer ID CustomerAddress Phone Email Account Balance Currency
js0001 John Smith123 Nowhere Street555-123-456 jsmith@nowhere.com-100 USD
jd2345 Jane Doe 61a Down the road087-963258 jdoe@downthe road.com-2108 GBP
mx9999 Mr X Whoknowsville 147-852369 mrx@whoknows.com0 EUR

In reality the column headers may be called eg (CustID, CustName, CustAdr, CustPh, CustMail, CustACBal, Currency).

As I am not the generator of this report, I would like to know whether or not it is possible to identify the field names and / or what tables they exist in, if I were to used the report info to search for it. For example, could I perhaps find out the field name and table for "jd2345" or for "mrx@whoknows.com", because the Customer ID or Email may not be what the actual fields are called.

I'm not a DB admin and I don't have rights to do a stored procedure on the server. I'm guessing what I want is not so simple to do, but is it possible to do via a query?

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SQL Server 2008 :: IPAddress - How To Split One Column Into Two Columns

Mar 6, 2015

I have a ipaddress column is there where i need to split the column into two columns because of

values like below,Fe80::7033:acba:a4bd:f874,Fe80::7033:acba:a4bd:f874,Fe80::7033:acba:a4bd:f874

I have written the below query but it will throw some error.

select SUBSTRING(IPAddress0, 1, CHARINDEX(',', IPAddress0) - 1) as IPAddress0


Msg 537, Level 16, State 2, Line 1
Invalid length parameter passed to the LEFT or SUBSTRING function.

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SQL Server 2008 :: Build A Query That Put Different Types In Columns

Jun 5, 2015

I have 3 tables, a supplier table, a types table and a relationship table between the two..I want to build a query that put the different types in columns, and use a Boolean value to identify if the supplier supplies that type.

CREATE TABLE #Suppliers(
id INT,
nam NVARCHAR(50)


It's possible to do this in "one" query?

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SQL Server 2008 :: How To Change Columns Based On Another Field Value

Jun 10, 2015

I would like to pull data from two seperate columns based on the vaule for MakeFlag. So if MakeFlag = 0 I would like the description to show but anything else I would like catalog description to show up.

DECLARE @MyVari varchar(20)
SELECT [ProductID]

[Code] ....

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SQL Server 2008 :: Dynamic Conversion Of Pivot Columns

Jun 15, 2015

I have attached SQL File which Gives me the below resultset Excel.xlsx

But the problem is i am not able to round off the dynamic columns in side my PIVOT, how to rewrite the dynamic query.

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SQL Server 2008 :: Dated Columns With Drill Report?

Jul 4, 2015

I have a matrix report with STORES in the row group and DATES in the column group. The table sums on SALES. The DATES column is formatted like =format(Fields!DATES.Value, "MMM yyyy"). The table also has 2 parameters @Start and @End. This all works great but I then added a child report so that the user can click on the SALES value for any sale by month and store. The child report uses the @Start and @End parameters from the original report but this is where I run into problems.

Rather than bringing me the sales details for a particular store and month it brings back everything from the time period selected with the original date parameters. So say I originally selected 2015-01-01 to 2015-06-30 with the parameters when I select on FEB 15 in my matrix report I get Febs data along with all the other months ie Jan-Jun 15. The DATES fields in both reports are in the same date format - in fact both reports use exactly the same dataset.

I realize it's something to do with the formatting of the DATE field not being recognized in the linked report.

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SQL Server 2008 :: Creating Index Including Non-key Columns

Jul 9, 2015

Does including non-key columns work for the performance of an index?

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SQL Server 2008 :: Adding Columns To Table Type?

Jul 24, 2015

Is there a good way to add columns to a table type?

I built several procs which make use of table-valued-parameters, and they work pretty nicely, until I need them to accept additional columns. Then I have to drop all the procs that use them, alter the types, and rebuild all the procedures, which is a huge pain in the rear.

Is there any good way (built in, or custom) to alter the def of a table type that's used as a parameter to multiple stored procedures?

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SQL Server 2008 :: Query To Fall Back On Different Columns

Oct 28, 2015

I have a person table

PersonID INT
Name varchar(50),
HireDate datetime,
HireOrder int,
AltOrder int

Assume I have data like this

INSERT INTO Person VALUES(1, 'Rob', '06/02/1988', 0, 0)
INSERT INTO Person VALUES(2, 'Tom', '05/07/2016', 0, 0)
INSERT INTO Person VALUES(3, 'Phil', '01/04/2011', 1, 0)
INSERT INTO Person VALUES(4, 'Cris', '01/04/2011', 2, 0)
INSERT INTO Person VALUES(5, 'Jen', '01/04/2011', 3, 0)
INSERT INTO Person VALUES(6, 'Bill', '01/05/2011', 0, 0)
INSERT INTO Person VALUES(7, 'Ray', '01/23/2012', 0, 0)

I'm trying to simplify my requirement... providing the input of HireDate, HireOrder, and AltOrder, I need to be able to pick up the next person

For ex:, if I provide input, HireDate: 06/02/1988, HireOrder:0, AltOrder:0, the return value expected is "Tom" because he is the next person after the provided input.

For ex:, if I provide input, HireDate: 05/07/2016, HireOrder:0, AltOrder:0, the return value expected is "Phil" because he is the next person after the provided input. Though Phil and Cris have same dates, their HireOrder takes precedence in this case. If they also have same HireOrder, AltOrder would be coming in picture to determine next person

Another ex: if I provide input, HireDate: 01/04/2011, HireOrder:1, AltOrder:0, the return value expected is "Cris" because she is the next person after the provided input. Here hireorder determines.

If I provide, HireDate: 01/23/2012, HireOrder:0, AltOrder:0, as there is no person after this, I should be able to pick the first person on the list - in this case Rob.

I can write some business logic in front-end, but I thought it would be good, if I can move this to a stored procedure which can return me the PersonID for optimal performance.

I have tried writing various conditions but couldn't achieve a query that meets all my requirements here.

I'm even fine if my last condition is not met (returning the first person in the list, in case no one is available after the provided input).

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SQL Server 2008 :: Split Comma Separated String Into Columns?

Apr 24, 2015

Our front end saves all IP addresses used by a customer as a comma separated string, we need to analyse these to check for blocked IPs which are all stored in another table.

A LIKE statement comparing each string with the 100 or so excluded IPs will be very expensive so I'm thinking it would be less so to split out the comma separated values into tables.

The problem we have is that we never know how many IPs could be stored against a customer, so I'm guessing a function would be the way forward but this is the point I get stuck.

I can remove the 1st IP address into a new column and produce the new list ready for the next removal, also as part of this we would need to create new columns on the fly depending on how many IPs are in the column.

This needs to be repeated for each row

, LEFT(IP_List, CHARINDEX(',', IP_List) - 1) AS IP_1
, REPLACE(IP_List, LEFT(IP_List, CHARINDEX(',', IP_List) +0), '') AS NewIPList1
FROM IpExclusionTest



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SQL Server 2008 :: Job Activity Monitor - Swapping Order Of Columns

May 28, 2015

Is there a way to permanently change the order of the columns in Job Activity Monitor?

I'd like to move Duration to the right of Step Name, but this only lasts so long as I have JAM open. Once I close it and re-open, JAM goes back to its default column order. Google gives me nothing but the temporary "drag and drop" method that I already know about.

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