Find Average Marks At Various Intervals Of Serial Number
Nov 24, 2013
I have this table of Marks as shown below. All I need is to find the average Marks at various intervals of S.no. That is I need averages at every 3rd S.No. as shown.
S.No. Marks
1 ------ 5
2 ------ 5
3 ------ 6 1st Average Value here (16/3)
4 ------ 5
5 ------ 6
6 ------ 7 2nd Average Value here (18/3)
7 ------ 7
8 ------ 7
9 ------ 8 3rd Average Value here (22/3)
10 ----- 8
11 ----- 9
12 ----- 8 4th Average Value here (26/3)
So basically I need a new table which will have 4 average values for the table above. Of-course the table can be much bigger and the average values can be at any nth value of S.No.
I need a query to find max serial number by comparing two different tables. Here is my requirementI am having two tables named Table1 and Table2. Each tables having more than 30,000,000 records.I want a simple query to find Max srno from two tables.For exampleIf Table1 max is 245 where partno=2 and ano=2and Table2 max is 343 where partno=2 and ano=2Then 343 is max serial noIf Table1 max is 435 where partno=2 and ano=2and Table2 max is 34 where partno=2 and ano=2Then 435 is max serial noI used this query but its taking more time select max(v.MaxSrNo) from ((select max(MaxSrNo) as MaxSrNo from Table1 where partno=@partno and ano=@ano)union all (select max(MaxSrNo) from Table2 where partno=@partno and ano=@ano)) as v Pls give me a simple query to find max srno.
Please give me the correct function name, otherwise please ignore in sending reply. I had used all the functions like identity, ident and so on. I need while selecting a querry, i need to generate serial numbers. I dont have identity column in my table. But, i need to generate serial numbers..
In Sybase SQL Any where, we have a function called Number (*) which will in turn generate serial numbers like ex..
Select Number (*) from x
The output will be
Number(*) 1 2 3 4 5 6 and so on..
I need a equivalent function in SQL Server 7.0 in which if i do select on that particular function with a table i should return above values..
select SERIALNO, Max(TIME) from dbo.TASK A join dbo.Status B on A.TID=B.TID where A.ID in ('1111',2222') and A.TYPE='Pen' group by B.SERIAL_NO, B.TIME order by BM.TIME
For this query I may get serial no duplicates but times are unique
For that serial no, I have to find the recent time. But if I use group by, I am getting the wrong no
I need a new field added 'Field1' which will add SEQUENCE number 1,2,.. based ON GROUP BY MasterID..AND another field TotalCount which will COUNT total masterID (here it will be 2)
I have Logs table and want to assign a serial number to the techs using the following query
Select Date, Case_ID, Site, Dept, Tech, Start_Time, ROW_NUMBER () OVER (PARTITION BY Date, Site, Dept, Tech ORDER BY Start_Time) as Row_Num FROM Logs Where Date = Getdate()
I get the following results.
Date Case ID Site DeptTechStart TimeRow_Num 7/28/14 10023 TartvilleMaintcAmy P.7:301 7/28/14 56789 TartvilleMaintcRem W.8:051 7/28/14 23098 TartvilleMaintcAmy P.8:352 7/28/14 70004 TartvilleMaintcAmy P.9:103 7/28/14 12708 TartvilleMaintcMag O.10:001 7/28/14 10004 TartvilleMaintcAmy P.12:304 7/28/14 40056 TartvilleServiceJoe F.7:301 7/28/14 23458 TartvilleServiceJoe F.7:552 7/28/14 69200 TartvilleServiceRus T. 7:301
Please notice the cases in Maintc department. See how Amy P.'s shift is broken by Rem W. and Mag O. But the Row Number does not recognize this, it still says Amy P's case as 2 and 4 the even though Rem's and Mag's cases were in between.
This is what I really wanted.
Date Case ID Site DeptTechStart TimeRow_Num 7/28/14 10023 TartvilleMaintcAmy P.7:301 7/28/14 56789 TartvilleMaintcRem W.8:051 7/28/14 23098 TartvilleMaintcAmy P.8:351 7/28/14 70004 TartvilleMaintcAmy P.9:102 7/28/14 12708 TartvilleMaintcMag O.10:001 7/28/14 10004 TartvilleMaintcAmy P.12:301 7/28/14 40056 TartvilleServiceJoe F.7:301 7/28/14 23458 TartvilleServiceJoe F.7:552 7/28/14 69200 TartvilleServiceRus T. 7:301
I tried many combination of columns for Partition by () and Order by () and the best I can get is the result at the top. How should I achieve it.
A vehicle loading confirm after that what time its gated out so i want to take the time duration between finish loading and gate out, find sample table records , i want to take more than 5 hrs difference between finish loading and gate out.
I work for an organization that repairs serialized devices. Each time a device is repaired it's serial number is recorded in a database table along with the date it was repaired along with other information about the device. There are multiple cases where a unit has been repaired more than once.
I am trying to write a query that will return the serial only once and that record will be the record of the latest repair date. To sum it up,
Return a list of serials where if a serial exists more than once in the table, return only the instance of the serial record(s) with the max(created_dt). The end result will be a list of distinct serial numbers.
Here is my Query. The problem I believe is in my sub-query but I am not sure how to structure it.
I'm wanting to get the average number of days between orders in my orders tbl - so I've done a search and found the following sql coded that I have modified for my db tbl's and columns. But when I try and parse it - I get 'Incorrect syntax new the keyword Group' - what am I missing.
SELECT custId, AVG(invDate - priorDate) FROM(SELECT custId,invDate,LAG(invDate) OVER (PARTITION BY custId ORDER BY invDate)as priorDate FROM orders) Group BY custId
What is the piece of SQL which looks at the average date difference for each enquiry and then sums it all up to give an overall average number of days it takes?
I am trying to find out the the Average number of contact hours per student. in Reporting Services 2005. The contact hours is the in the Totaltime field
Is this formula correct
=Sum(Fields!TotalTime.Value)/Avg(Fields!TotalTime.Value) is in the =Fields!StateServices.Value Group
Example table structure: Id int, PK Name varchar AddDate smalldatetime
Sample data: Id Name AddDate 1 John 01/15/2005 2 Jane 01/18/2005 . . . 101 Jack 01/10/2006 102 Mary 02/20/2006
First, I need to find the month which has the most records, I finally produced the correct results using this query but I am not convinced it's the most efficient way, can anyone offer a comment or advice here?
select top 1 count(id), datename(mm, AddDate) mth, datepart(yy, AddDate) yr from dbo.sampletable group by datename(mm, AddDate), datepart(yy, AddDate) order by count(id) desc
Also, I'm really having trouble trying to get the overall average of records per month. Can anyone suggest a query which will produce only one number as output?
I have two fields ID and Log data and log data is a 96 character long string of numbers representing 15 minute intervals from midnight to midnight.
I need to convert these 96 characters to a full 1440 characters which would mean taking each of the 96 characters one by one and making 1 character into 15.
I had Vb macro to do the conversion but now it's broken and I can't fix it. Getting it done in SQL would solve a lot of problems.
I then go from the 1440 fields and do log analysis like total time doing a specific activity but my query is dependent on having all 1440 characters.
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:
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.
I have a part number field which contains whole numbers. (1 - 5000+) however there are gaps in the numbers e.g. Part Number 3876 maybe missing. The table has new parts inserted from a VB Client. Im trying to write a stored procedure where when a user trys to run an update without entering a part number the first missing part number is found. If they do provide a part number then their number is committed as long as it is unique. I've tried using cursors but am not sure on the best approach. Any suggestions?
Can someone suggest a FAST way to select Currency values where the number has more than X decimal places? There are zillions of rows so looping in code is not the preferred solution.
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');
I try to find the number of rows in a table with this commands: CountRec = New SqlParameterCountRec.ParameterName = "@countrec"CountRec.SqlDbType = SqlDbType.IntCountRec.Value = 0MyCommand = New Data.SqlClient.SqlCommand()MyCommand.CommandText = "select count(*) as @countrec from Customer;"MyCommand.CommandType = Data.CommandType.TextMyCommand.Connection = MyConnectionMyCommand.Parameters.Add(CountRec)MyCommand.Connection.Open()MyReader = MyCommand.ExecuteReaderiRecordCount = CountRec.Value This is the result: Incorrect syntax near '@countrec'. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Incorrect syntax near '@countrec'.Source Error:
Line 39: Line 40: MyCommand.Connection.Open() Line 41: MyReader = MyCommand.ExecuteReader Line 42: iRecordCount = CountRec.Value Line 43: Source File: E:DevelopWebASPwebAccessTimberSalesUserEntry.aspx.vb Line: 41 What to do? I need a complete example to see how it works. Thanks...
I am using SQL 6.5 and I would like to know (using Isql/w) the number of users connected to my server at any given time. Thanks for your help in advance.
