Calculating Between Tables
Nov 15, 2005
Hi All,
I have a very complicated project and for some reason I have decided to use SQL server as the backend database. I am new to it and have encountered my first problem. In basic terms what I want to be able to do is increment/decrement a field in a table according to something that happens in a different table. Where do I start?
So for example, a stereo system/cd player can have 10 cds at one particular time, when 2 cds are removed, then 8 slots are available. Then when 1 of the 2 remaining slots are filled then 1 slot remains and so on....so I want some sort of a counter field. Using that field I want to be able to generate a report on what is currently available.
Please Excuse my lame example but can anyone please help?
Thanks
Ben
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Jan 19, 2007
Goodmorning,
In one report I have 2 tables. Both tables are related to a different data set. Now I want to create a calculating between a field of the table 1 and a field of table 2.
Does anyone know how to?
Thx anyway!
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Aug 6, 2001
Hi,
how do i calculate rowsize for user tables in a database
Thanks in advance.....
jfk
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Aug 29, 2014
I have a table which contains readingtime (records every 4 seconds during the day) and an energy reading. I wanted to know how much energy was used in a day. This is the query that i used
SELECT date(readingtime), max(energy)-min(energy)as total FROM lights_1 WHERE readingtime between 20140407000000 and 20140409235959 Group by date(readingtime) LIMIT 0,30;
This gave me the desired results for 1 table. I have 4 tables of these lights_2, Lights_3, lights_4 and i would like to display them together and hence match up the reading time so each day has the energy requirements for all for tables with the total. When i try and join tables i get a lot of errors!
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Feb 24, 2005
Hi,
I'm using scalar UDFs in SQL server to return computed values. I've been trying to use the same udfs to perform the same computations but from different tables, but I'm not sure how. Can someone please help???
Here's an example of a counter that I'm using to return the number of days.
CREATE FUNCTION [dbo].[MarketPulse_fn_Counter] (@date smalldatetime, @date2 smalldatetime, @osid int)
RETURNS int AS
BEGIN
return (select count(*) from MarketPulse_0ndqc
where stockosid = @osid and createdate <= @date and createdate >=@date2 )
END
How can I use this same UDF to do the same computation but to SELECT from another table and return that value?
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Sep 26, 2006
I want to sum up a column, but only summing up the top 25 quantites and then I want to subtract the sum of all quantities from the total of the top 25...how would this be done with t-sql?
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Jul 2, 2001
SQL7
I am interested in your opinion on the creation of primary keys in a table - simple ones that is. It would be the replacement for an Identity column.
Some say calculate the value off a lookup table, others say use an external object like c++ dll reading/incrementing from a flat file.
Using an identity column reduces portability of the table.
Thoughts ?
Craig
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Nov 15, 2001
Hi,
What the best way to calculate the age given two datetimes.
I tried using the DATEDIFF(yyy,startdate,enddate) but that seems to only compare the year and not look at the specific day.
I am looking for something that would return the following output
birthday= 12/6/1973
EndDate = 11/30/2001
then the age should be 27
If birthday = 12/6/1973
enddate = 12/11/1973
then the age should be 28
thanks in advance
Zoey
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Apr 17, 2007
I'm in the process of developing a Kimball-method CRM data warehouse and I'd like to have Recency, Frequency, Monetary "scores" at the customer level. Am I better off creating these in the relational database and feeding them to SSAS or have SSAS do the aggregations and assign the "scores"?
Also, has anyone located any SSIS transform scripts that would calculated RFM scores? This is probably a pretty easy task in VB.net but I haven't gone down that road yet.
Steve
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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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Jul 3, 2007
When users register with my site they give me their DoB, how can I work out an age from it. I was thinkin about doing it from the year, but that isnt very accurate. Can anyone help? thanks si! ps Id only want to work out how many years old they are. si!
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Mar 28, 2008
I needed to come up with an algorithm to create unique user- friendly account numbers such as AC0000000001, AC0000000002, etc...Where they increment by 1. I created a SQL function that retrieves the previous number generated, adds 1 to it, inserts the new value into the table, then returns the new value. I started thinking, what if the function is ran at the same time? What if function # 1 creates the new number, and function #2 creates a new number as well before function #1 inserts it? Is this a possible scenario? If so, how do I lock the process until the function completes to prevent this? Thanks for any help you provide.
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May 30, 2008
Hi,
First off, let me state that i am new to ASP.net... and have had to hit the ground running... I have looked on the net but have not found a suitable explanation on how to do this.
Let me explain what i am trying to do: In my aspx page, i have 2 dropdown boxes where the user will select a skill catagory, and then a skill. Based on that selection, i would like to compute what the Service line will be. There is a primary and foreign key on CatID on the skills and SkillCat tables. This data would need to be inserted into the another table aswell, and this would need to go into a report later.
How do i go about doing this? Some examples would be greatly appreciated. And if you know of a good link, please post it for me.
Skills Table
CatID
SkillID
Skills
SL_ID
1
4
Skill 1
3
2
5
Skill 2
2
2
6
Skill 3
2
3
7
Skill 4
4
3
8
Skill 5
4
4
9
Skill 6
NULL
4
10
Skill 7
NULL
5
11
Skill 8
3
6
12
Skill 9
3
7
13
Skill 10
4
8
14
Skill 11
1
9
15
Skill 12
3
9
16
Skill 13
3
10
17
Skill 14
6
11
18
Skill 15
1
Skills Catagory
CATID
Org
Skillcat
1
Org1
Skill Category 1
2
Org2
Skill Category 2
3
Org3
Skill Category 3
4
Org4
Skill Category 4
5
Org5
Skill Category 5
6
Org6
Skill Category 6
7
Org7
Skill Category 7
8
Org8
Skill Category 8
9
Org9
Skill Category 9
Service Line Table
SL_ID
Service_line
1
Service Line 1
2
Service Line 2
3
Service Line 3
4
Service Line 4
5
Service Line 5
6
Service Line 6
7
Service Line 7
Thanks for all your help in advance.
Dash
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Nov 23, 2001
Hi,
I'm using SQL Server 7.0 SP3.
I need to calculate the average size of a record in my database to assist in estimating growth.
Is there a quick and/or easy way of doing this?
Thanks in advance,
Darrin
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Aug 26, 2005
Hi,
I'm fairly new to MS SQL, but I'm trying to query the time elapse between two dates. Example below...
Select
dbo.res.book_date,
dbo.res.arrive_date,
Cast (dbo.translog.systemdate as datetime)
From
dbo.res
Where
dbo.res.resid > '500'
The third line is where I need help with a statement. I need the elapse time. Ex. if the book date is 20050820100000 and the arrive date is 20050820120000, I would like the third Select statement to return 2:00 hours or something similar. Thanks.
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Aug 27, 2005
Hello,
I am fairly new to this, but I need to write a query that calculates whether an order made a shipping cutoff based on creation time, and when it actually shipped, based on local customer time. All times in the table below are central time.
Heres where it gets complicated for me. If the order was created after 8:00am local customer time the same day, and shipped prior to 5pm local customer time, it would be considered a pass, or a 1. If an order was created after 8am local customer time, BUT didnt ship until AFTER 5pm local customer time, it would be considered a failure or a 0. And to complicate things even more, if the order is created after 5pm local customer time, the order create time would be treated as it was created at 8am local customer time the following day local customer time, and would need to be shipped prior to 5pm local customer time that day. Would CASE be appropriate for this? Or am I thinking wrong? Any help would really be appreciated!!
Ordernum OrderCreate OrderShipDate TimeZ
67890 5/5/2005 11:575/6/2005 15:33 EST
35789 5/5/2005 13:575/5/2005 14:19 MST
44465 5/5/2005 13:58 5/5/2005 21:58 CST
87654 5/5/2005 18:00 5/7/2005 21:58 PST
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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.
Code:
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
UNION ALL
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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May 16, 2004
I have a table in my sql server that calculates renewal dates for me, that date is based on the final suit date. The table has the ssn, and the FinalSuitDate its in a one to many relationship with the employeetable.
the Finalsuit table is suppose to calculate the renewal dates(which I'm trying to do in a query) my original expression in access was using dateserial FirstRenewal: DateSerial(Year([FINALSUITDONE])+2,Month([FINALSUITDONE])+1,Day([FINALSUITDONE])=30), but sql does not recognize that.
For Example
If the Finalsuit is 12/01/2000
then the renewal would be 12/31/2002
the renewal are to be done on the last day of the month and two years from the finalsuit date. Problems is I'm having problems doing this in sql servers query?
Can someone out there help please
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Dec 19, 2001
--Use the following formula to calculate a person's age in years in a stored procedure,
--where @dob is the person's date of birth and @yyyymmdd is the date on which to determine the age:
DECLARE @age int
DECLARE @dob datetime
DECLARE @yyyymmdd varchar(11)
SELECT @dob = '12/06/1966'
SELECT @yyyymmdd = GETDATE()
SELECT @age = FLOOR(DATEDIFF(day, @dob, @yyyymmdd) / 365.25)
PRINT CONVERT(varchar, @age)
--Notes:
--Substitute "getdate()" for the @yyyymmdd variable if you want to determine the person's age right now.
--The function divides by 365.25 to allow for leap years and uses the FLOOR function to make sure the function returns an integer.
--The function DATEDIFF(year, @dob, @yyyymmdd) doesn't work because Microsoft chose to implement
--the "year" part of the function to calculate the number of year boundaries crossed.
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Mar 16, 2006
If two records containing datetime stamps are SELECTed, how can the interval between them be quickly calculated?
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Jul 11, 2006
I have three columns in my table,'StartDate',EndDate','BatchID'
When I upadate the the table for 'EndDate' I want to calculate the
I want to store this modified value somewhere and calculate the difference in (Value of 'End Date' Before update)-(Value of 'EndDate' after Update')
How it is possible?
Thanks in advance
Swati
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Jan 18, 2007
I am trying to get a query that will allow me to report the time taken to complete a certain training module.
The database itself does not have a duration field so I am tring to get the duration by using MIN and MAX. I can get the timing for when the module was opened and the time for the last mouse click on it, from this I need to be able to calculate the time taken to complete.
Query I am using to get the basic info comes from 3 tables so I have only attached the relevent output. Query used is as follow:
SELECT *
FROM PPS_SCOS, PPS_TRANSCRIPTS, PPS_TRANSCRIPT_DETAILS, PPS_PRINCIPALS
WHERE PPS_SCOS.SCO_ID = PPS_TRANSCRIPTS.SCO_ID
AND PPS_TRANSCRIPTS.TRANSCRIPT_ID = PPS_TRANSCRIPT_DETAILS.TRANSCRIPT_ID
AND PPS_TRANSCRIPTS.PRINCIPAL_ID = PPS_PRINCIPALS.PRINCIPAL_ID
AND PPS_SCOS.NAME LIKE 'MTM-106 The Dangers of Smoking'
AND PPS_PRINCIPALS.NAME LIKE 'Nigel Cordiner'
AND PPS_TRANSCRIPTS.TICKET NOT LIKE 'l-%'
ORDER BY PPS_TRANSCRIPT_DETAILS.DATE_CREATED
Output:
pps_scospps_scospps_transcript_detailspps_principalspps_principals
SCO_IDNAME DATE_CREATED PRINCIPAL_ID NAME
136850MTM-106 The Dangers of Smoking08:17:2516287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:17:2516287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:17:4016287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:18:2516287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:18:5716287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:19:1416287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:19:4716287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:20:2116287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:20:4416287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:21:2616287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:22:1316287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:24:5516287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:25:1216287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:25:2916287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:26:4916287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:27:0216287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:27:2916287Nigel Cordiner
136850MTM-106 The Dangers of Smoking08:27:4316287Nigel Cordiner
Have added the column heading and the tables the output comes from.
Relatively new to SQL so any help would be greatly received.
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Dec 10, 2007
One more for you while I'm trying to remember my SQL skill from a few years ago (last one of the day - promise):
My database looks like:
(Ignore that the ERD is in Access, the database is SQL Server 2005)
How do I calculate sales percentages?
I.E. how do I calculate the percentage that each product has sold as a percentage of the total sales?
What I'm aiming for is each row of products is shown, with its percentage of the whole sales.
AVG is involved this time, isn't it?
The productID is of the int datatype (not that you need to know that field - but never mind) and the quantity is a smallint, before you ask
Thank you in advance for any replies.
Paul
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Mar 3, 2008
Hi,
Im building a DB for a uni project and im having a little trouble creating a column that makes a calculation using 2 of the other columns.
I need to do this;
Select Reps, Weight, ((Reps / 30) + 1) * Weight AS [1RM]
From ......
But, SQL server 2005 doesnt seem to like my syntax and gives a wrong result.
Can anyone help?
Thanks,
M4tt
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Mar 25, 2008
My site has members. Each member has a certain goal, an amount that they are hoping to raise. Here's my tables:
---------------------
Members
---------------------
ID | Goal
---------------------
---------------------
Donors
---------------------
Amount | MemberID
---------------------
I'm trying to get the percentage of money raised compared to their goal. Basically 100*(SUM(Amount)/Goal). Here's my stored procedure:
CREATE PROCEDURE sproc_GetGoalPercentage
(
@memberid int
)
AS
SELECT(SUM(D.Amount)/M.Goal)*100
FROMMembers AS M INNER JOIN Donors AS D
ON M.ID = D.MemberID
WHEREM.ID = @memberid
GROUP BY M.Goal
RETURN
All it does is return 0.
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Feb 20, 2008
I'm putting together a manual system that tracks data growth in a certain database. I was going to use sp_spaceused as a part of it, but then realized the datatypes for size are CHAR, not INT or BIGINT. I was going to do counts, averages, etc. on those columns but that wouldn't work against a CHAR field obviously. I could easily write a little something to strip out the KB, but was hoping there was another way to get those figures.
Secondly...has anynoe seen a stored procedure/code/etc. that just calculates the largest/smallest/average row size for a table? I haven't been able to find anything anywhere...
Any insight would be greatly appreciated...
Thanks!
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Aug 20, 2007
Hi,
I am wondering what is vb.net method of calculating the prior business day (Monday - Friday).
For example, if today is Monday, Aug. 20, the last business day would have been Friday, Aug. 17.
I have a way to do this in SQL, but not vb.net.
Thanks much
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Jul 12, 2006
I have a table with only one column each for longitude and latitude. They will be passing the sa_property_id which has a long and lat listed. I need to show what else is withing 1 mile or 5 miles of that properties long/lat
--Table
CREATE TABLE [dbo].[PropertyDetails] (
[SA_PROPERTY_ID] [int] NOT NULL ,
[SA_X_COORD] [float] NULL ,
[SA_Y_COORD] [float] NULL ,
[Longitude] [float] NULL ,
[Latitude] [float] NULL ,
) ON [PRIMARY]
GO
Data output from above table
SASA_PROPERTY_ID Longitude Latitude
-------------- ----------------------------------------------------- -----------------------------------------------------
23790208 -120.619821 39.568587999999998
(1 row(s) affected)
Passed parameter = SA_PROPERTY_ID
Need list of matching records within 1 mile of above record
Would this be the best query for it? how do I define the radius?
I also have a function, but am not sure it can do what I need it to.
/*
* History: 14-Nov-05 CNH Simplified to resolve Divide By Zero problems
* 29-Mar-02 DKS Created by Deepak K Srinivasan
*
* Test Data:
*
* City Latt Long
* ---- ---- ----
* NYC 40.77 74
* SF 37.75 122.68
* Oakland 37.73 122.22
* Burbank 34.2 118.37
*/
CREATE FUNCTION dbo.CalculateDistance(@LatDeg1 FLOAT, @LonDeg1 FLOAT, @LatDeg2 FLOAT, @LonDeg2 FLOAT)
RETURNS FLOAT AS BEGIN
DECLARE @EarthRadiusMiles AS FLOAT,
@LatRad1 AS FLOAT,
@LonRad1 AS FLOAT,
@LatRad2 AS FLOAT,
@LonRad2 AS FLOAT,
@DotProd AS FLOAT
SET @EarthRadiusMiles = 3958.755 -- Volumic Radius of the Earth in Miles
SET @LatRad1 = RADIANS(ISNULL(@LatDeg1, 0.0))
SET @LonRad1 = RADIANS(ISNULL(@LonDeg1, 0.0))
SET @LatRad2 = RADIANS(ISNULL(@LatDeg2, 0.0))
SET @LonRad2 = RADIANS(ISNULL(@LonDeg2, 0.0))
SET @DotProd = SIN(@LatRad1) * SIN(@LatRad2) + COS(@LatRad1) * COS(@LatRad2) * COS(@LonRad1 - @LonRad2)
-- T-SQL provides ACOS. So, there is no need to implement it via ATAN:
RETURN @EarthRadiusMiles * ACOS(@DotProd)
END
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Feb 6, 2008
Hi,
Our tables have a reference field which users can enter their own references into.
However, they can choose to have the system calculate the next reference number.
The reference can contain any characters from a-z, A-Z and 0-9.
In our system, reference AAAA is greater than reference ZZZ; the next reference after AAAA is AAAB.
How would I calculate the greatest current reference in the table?
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Nov 1, 2007
I have a project where I need to populate a table with a Begin and an end date based on another field with in the table. my example is that the other field will have a value of "monthly" I want then a record to be entered on the table with a begin date of November 1 and the en date as November 30th. I want this record to get populated only on business days. my thinking is a stored procedure that runs daily and only creates a record at a time. i am thinking if the user selects weekly the dates populated would be november 1 = begin date and Novemeber 2nd = end date
i want to fill out a current month at a time as if the account closes i will not need the extra cases.
thanks
Don S
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Dec 19, 2007
Hi, I'm in the process of creating a database table and was wondering if it's better to store calculated values or recalculate them each time. So for example, I am creating a table that stores articles and then a table to store the pages to the article. If a new page is added should I update the pages field in the articles table or should I calculate the number of pages for an article when it's queried? Thanks,John
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Aug 31, 2004
Hi I am quite struggling to work out how to calculate profit in stored procedure.
The problem is
I have the table:
share name / transaction date/ is it buy or sell / no of shares bought or sold /total cost
I need to calculate how much profit was made on sold shares
The problem is that I need to always assume that you sell shares which were bought first first.
So if I have in chronological order:
tesco buy 50 £200
tesco buy 40 £100
tesco sell 55 £600
profit is
costtobuy of 55 shares: 50 shares at £200 + 5 shares at (£100/40*5 =)£12.50 = £212.50
profit = £600 - £212.5 = £387.50 (too good to be true)
my plan was (if it is too confusing please ignore it and just read the part above)
1 to work out no of shares sold and total cost of sold shares
so
select sum(no of shares) as nosold ,sharename where transaction = sell and sharename= @sharename return noofshares
select sum(totalsold) as totalcostsold , sharename where transaction = sell and sharename = @sharename return totalsold
now i need to loop through buys to work out cost to buy of number of shares sold:
so i need to loop through a table which would have buy transactions only(share name, nobought, totalcost) and check what was the cost to buy of this number of shares:
@nosold(from above table)
@sharename
output totalcosttobuy = 0
if(nobought = nosold) totalcosttobuy = totalcostobuy + totalcost
retrun
else if (nobought>nosold)totalcosttobuy = totalcostobuy + (totalcost/nobought)*nosold
return
else if( nobought<nosold)totalcosttobuy = totalcostobuy + totalcost
nosold = nosold-nobought (go back to beginning of if)
where sharename = @sharename
group by sharename
Well I need this if statement to loop through the rows in the table how can I do that?
Then I can do profit = totalcosttosell - totalcosttobuy
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Aug 21, 2005
I have table with three columns: 1) TodaysDate,
2)
DueBackDate,
3) DaysOverdue
The problem I am having is creating a formula in MS SQL, so that when
the 'DueBackDate' column is more than todays date, I want the
'DaysOverdue' column to be incremented accordingly.
I have tried creating an SQL Query something like this:
UPDATE rental
SET DaysOverdue = DaysOverdue + 1
WHERE ({ fn NOW() } > DueBackDate)
But the problem with this that it only increments the 'DaysOverdue'
field by 1. When I want it to basically subtract todays date by
'DueBackDate'.
I have tried to also create a formula within MS SQL but I come up with
errors. I have done something like this in Access which worked. The
Formula looked like this:
IIF(Now()>[DueBackDate],int(Now()-[DueBackDate]),0)
Is there a way to convert this formula so that is would work in MS SQL?
Thanks.
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