I got one question for SQL query (sql server) for which I am very confused what they want to me display in the first place. This is one exam question, so I do not believe it's a mistake and unfortunately I cannot ask for clarification.
Question:
"Write a query that has the following columns:
Transaction ID, Stock type.
Group the rows according to the portfolio."
My current query will be:
select p.prfid 'Portfolio', t.trdnbr 'Transaction ID', s.instype 'Stock Type'
from transaction t, stock s, portfolio p
where t.insaddr = s.insaddr
and t.prfnbr = p.prfnbr
One portfolio can have multiple transactions, but I am confused because they are not looking for number of transactions per portfolio (in which way "group by" will have total sense), so I am not sure in which way I should group them (except of simple sorting).
Also I was wondered if they expected me to write portfolio name in the where clause in order to group similar transactions... I don't know I am very confused.
Please help at least in which way you think they want me to present the result.
My current sample output for better view of data (it DOES NOT mean it should look like that))
Portfolio Transaction ID Stock Type
Cash 1001 Deposit
Cash 1002 Currency
Crypto 1003 Stock
Thanks
I am trying to run a query to do the following; all of the information will be contained in the same table.
For a specified product of interest find the price of the product and the country it is sold in. The result of this query should produce a set of countries and a set of prices that correspond to the sales price of that product in each country (the prices will differ across countries).
For example, the result of this query may reveal that the product is sold in India for 100$ and Russia for 200$.
(In advance of running this query, we did not know the product was sold in these countries or the prices)
The results of that query, should then be used as a joined set of conditions to pull other parameters of interest from the table as per another query. The results of this query is the ultimate outcome we hope to achieve.
ie, The 2nd query should work as if it was stated where country = India AND Price = $100 (ie only IF both are true), return the name of all products that match this criteria (this will reveal alternative products at this price point in this country).
Repeat this search approach to show all products where country= Russia and price= $200 etc.
The first query should produce set of conditions and the 2nd query should loop through each of those conditions and produce the result.
The country and price combinations will differ and should not be defined statically at any point.
I have seen a few different approaches including WITH, CTE and subqueries but have struggled to do this correctly.
Part of the problem I am having is that my condition for the 2nd query is a combination of the results of the 1st query.
Any help with this is really appreciated! Thanks in advance!
You should use a cursor that will run on the first query, will keep the 2 results in 2 local variables in every iteration and then will run the second query with those variables.
I have a database in which there are 13 different products, sold in 6 different countries.
Prices increase once a year.
Prices need to be calculated using a linear interpolation method. I have 21 different price and quantity increments for each product for each country for each year.
The user needs to be able to see how much an order would cost for any given value (as you would expect).
What the database needs to do (in English!) is to:
If there is a matching quantity from TblOrderDetail in the TblPrices,
use the price for the current product, country and year
if there isn't a matching quantity but the quantity required is greater than 1000 for one product (GT) and greater than 100 for every other product:
Find the highest quantity for the product, country and year (so, 1000 or 100, depending on the product), and calculate a pro-rated price. eg. If someone wanted 1500 of product GT for the UK for 2015, we'd look at the price for 1000 GT in the UK for 2015 and multiply it by 1.5. If 1800 were required, we'd multiply it by 1.8. I haven't been able to get this working yet as I'm looking at it alongside the formula for the next possibility...
If there isn't a matching quantity and the quantity required is less than 1000 for the product GT but 100 for the other products (this is the norm)...
Find the quantity and price for the increment directly below the quantity required by the user for the required product, country and year (let's call these quantitybelow and pricebelow)
Find the quantity and price for the increment directly above the quantity required by the user for the required product, country and year (let's call these quantityabove and priceabove)
Calculate the price for the required number of products for an account holder in a particular country for a given year using this formula.
ActualPrice: PriceBelow + ((PriceAbove - PriceBelow) * (The quantity required in the order detail - QuantityBelow) / (QuantityAbove - QuantityBelow))
I have spent days on this and have sought advice about this before but I am still getting very stuck.
The tables I've been working with to try and make this work are as follows:
TblAccount (primary key is AccountID, it also has a Country field which joins to the TblCountry.Code (primary key)
TblOrders (primary key is Order ID) which joins to TblAccount via the AccountID field; TblOrderDetail via the OrderID. This table also holds the OrderDate and Recipient ID which links to a person in TblContact - I don't need that here but will need it later to generate an invoice
TblOrderDetail (primary key is DetailID) which joins to TblOrders via OrderID field; TblProducts via ProductID field, and holds the Quantity required as well as the product
TblProducts (primary key is ProductCode) which as well as joining to TblOrderDetail, also joins to TblPrice via the Product field
TblPrices links to the TblProducts (as you have just read). I've also created an Alias for the TblCountry (CountryAliasForProductCode) so I can link it to the TblPrices to show the country link. I'm not sure if I needed to do this - it doesn't work if I do or I don't do it, so I seek guidance again here.
This is the code I've been trying to use (and failing) to get my price and quantity steps above and I hope to replicate it, making a couple of tweaks to get the steps below:
SELECT MIN(TblPrices.stepquantity) AS QuantityAbove, MIN(TblPrices.StepPrice) AS PriceAbove, TblOrders.OrderID, TblOrders.OldOrderID, TblOrders.AccountID, TblOrders.OrderDate, TblOrders.RecipientID, TblOrders.OrderStatus, TblOrderDetail.DetailID, TblOrderDetail.Product, TblOrderDetail.Quantity
FROM (TblCountry INNER JOIN ((TblAccount INNER JOIN TblOrders ON TblAccount.AccountID = TblOrders.AccountID) INNER JOIN (TblOrderDetail INNER JOIN TblProducts ON TblOrderDetail.Product = TblProducts.ProductCode) ON TblOrders.OrderID = TblOrderDetail.OrderID) ON TblCountry.Code = TblAccount.Country) INNER JOIN (TblCountry AS CountryAliasForProduct INNER JOIN TblPrices ON CountryAliasForProduct.Code = TblPrices.CountryCode) ON TblProducts.ProductCode = TblPrices.Product
WHERE (StepQuantity >= TblOrderDetails.Quantity)
AND (TblPrices.CountryCode = TblAccount.Country)
AND (TblOrderDetail.Product = TblPrices.Product)
AND (DATEPART('yyyy', TblPrices.DateEffective) = DATEPART('yyyy', TblOrders.OrderDate));
I've also tried...
I've even tried going back to basics and trying again to generate the steps below in 1 query, then try the steps above in another and finally, create the final calculation in another query.
This is what I have been trying to get my prices and quantities below:
SELECT Max(StepQuantity) AS quantity_below, Max(StepPrice) AS price_below, TblOrderDetails.Quantity, TblAccounts.Country
FROM
(TblProducts INNER JOIN TblPrices ON TblProducts.ProductCode = TblPrices.Product)
(TblOrderDetail INNER JOIN TblProducts ON TblOrderDetail.Product = TblProducts.ProductCode)
(TblOrders INNER JOIN TblOrderDetail ON TblOrders.OrderID = TblOrderDetail.OrderID)
(TblAccount INNER JOIN TblOrders ON TblAccount.AccountID = TblOrders.AccountID),
WHERE (((TblPrices.StepQuantity)<=(TblOrderDetail.Quantity)) AND ((TblPrices.CountryCode)=([TblAccounts].[country])) AND ((TblPrices.Product)=([TblOrderDetail].[product])) AND ((DatePart('yyyy',[TblPrices].[DateApplicable]))=(DatePart('yyyy',[TblOrders].[OrderDate]))));
You may be able to see glaring errors in this but I'm afraid I can't. I've tried re-jigging it and I'm getting nowhere.
I need to be able to tie the information in to the OrderDetail records as the price generated will need to be added to a financial transactions table as a debit amount and will show as an amount owing on statements.
I'm really not very good at SQL. I've read and worked though several self-study books and I have asked part of this question before; but I really am struggling with it. If anyone has any ideas on how to proceed, or even where I've gone wrong with my code, I'd be delighted, even if you tell me I shouldn't be using SQL. For the record, I originally posted this question on a different forum under Visual Basic. Responses from that forum brought me to SQL - however, anything that works would be good!
I've even tried, using Excel, concatenating the Year&Product&Country&Quantity to get a unique product code, interpolating the prices for every quantity between 1 and 1000 for each product, country and year and bringing them into a TblProductsAndPrices table. In Access, I created a query to concatenate the Year(of order date from tblOrders)&Product(of tblorderdetails)&Country(of tblAccount) in order to get the required product code for the order. Another query would find a price for me. However, any product code that doesn't appear on the list (such as where a quantity isn't listed in the tblProductsAndPrices as it is larger than the highest price increment) doesn't have a price.
If there was a workable solution to what I've just described that would generate a price for everything, then I'd be so pleased.
I'd really like to be able to generate an order for any quantity of any product for any account based in any country on any date and retrieve a price which will be used to "debit" a financial account in the database, who in a transaction history for an account and appear on statements. I'd also like to be able to do an ad-hoc price check on the spot.
Thank you very much for taking the time to read this. I really appreciate it. If you could offer any help or words of encouragement, I'd be very grateful.
Many thanks
Karen
Maybe no one thinks on an easy solution to the problem, since not all minds work in database thinking.
Easy solution: Create one view that gives all calculated values, not only the final one you need, each one as a column. Then you can use such view in a relation view and use on some rows one of the values and on other rows other values, etc.
How to think is simple, think in reverse order, instead of thinking "if that then I need to calculate such else I need this other", think as "I need "such" and I need "this other", both are columns of an intermediate view, then think on top level "if" that would be another view, such view will select the correct value ignoring the rest.
Never ever try to solve all in one step, that can be a really big headache.
Pros: You can isolate calculated values (needed or not), sql is much more easy to write and maintain.
Cons: Resources use is bigger than minimal, but most of times that extra calculated values does not represent a really big impact.
In terms of tutorial out there: Instead of a Top-Down method, use a Down-Top method.
Sometimes it is better (with your example) to calculate all three values (you write sentences on bold) ignoring the if part, and have all three possible values for your order and after that discard the ones not wanted, than trying to only calculate one.
Trying to calculate only one is thinking as a procedural programming, when working with databases most times one must get rid of such thinking and think as reverse, first do the most internal part of such procedural programming to have all data collected, then do the external selection of the procedural programing.
Note: If one of the values can not be calculated, just generate a Null.
I know it is hard to think on First in, last out (Down-Top) model, but it is great for things as the one you want.
Step1 (on specific view, or a join from one view per calculation):
Calculate column 1 as price for the current product, country and
year
Calculate column 2 as calculate a pro-rated price as if 1000
Calculate column 3 as calculate a pro-rated price as if 100
Calculate column 4 as etc
Calculate column N as etc
Step 2 (Another view, the one you want):
Calculate the if part, so you can choose adequate column from previous view (you can use immediately if or a calculated auxiliary field).
Hope you can follow theese way of thinking, I have solved a lot of things like that one (and more complex) thinking in that way, but it is not easy to think as that, needs an extra effort.
I am trying to create a query that pulls two different aggregated values from three different tables during a specific date range. I am working in Access 2003.
I have:
tblPO which has the high level purchase order description (company name, shop order #, date of order, etc)
tblPODescription which has the dollar values of the individual line items from customers the purchase order
tblCostSheets which as a breakdown of the individual pieces that we need to manufacture to satisfy the customers purchase order.
I am looking to create a query that will allow me, based on the Shop Order #, to get both the sum of the dollar values from tblPODescriptions and the count of the different type of pieces we need to make from tblCostSheets.
A quick caveat: the purchase order may have 5 line items for a sum of say $1560 but it might take us making 8 or 9 different parts to satisfy those 5 line items. I can easily create a query that pulls either the sum or the count by themselves, but when I created my query with both, I end up with numbers that are multipled versions of what I want. I believe it is multiplying my piece counts and dollar values.
SELECT DISTINCTROW tblPO.CompanyName, tblPO.ShopOrderNo, tbl.OrderDate, Sum(tblPODescriptions.ItemAmount) AS SumOfItemAmount, Count(tblCostSheets.Description) AS CountOfDescription
FROM (tblPO INNER JOIN tblPODescriptions ON (tblPO.CompanyName = tblPODescriptions.CompanyName) AND (tblPO.PurchaseOrderNo = tblPODescriptions.PurchaseOrderNo) AND (tblPO.PODate = tblPODescriptions.PODate)) INNER JOIN tblCostSheets ON tblPO.ShopOrderNo = tblCostSheets.ShopOrderNo
GROUP BY tblPO.CompanyName, tblPO.ShopOrderNo, tblPO.OrderDate
HAVING (((tblPO.OrderDate) Between [Enter Start Date:] And [Enter End Date:]));
I have a set of tables in Access 2007 that I need to get to display the total number of items received. We order items against a job using the job number as a common reference (like an ID).
Each job has multiple items required. Most items have multiple shipments we receive. Each shipment is given a unique receiving ticket number, so they need to be entered individually and totaled.
I have:
tblJobItems :JobNumber, Item, QtyNeeded
tblReceived :JobNumber, Item, QtyRecvd, RTNumber (RT = Receiving Ticket)
tblJobs : JobNumber, JobQty (and more, but not relevant to this issue)
(JobQty is not always the same as the item's QtyNeeded. The job is like a run of a certain model of computer, the job qty is how many of that model. Items are sometimes 1:1, like a case or power supply, but can be 2:1 or 3:1 like having multiple hard drives.)
I have a query that works fine to show the number of items placed on order, but we want to expand it (or combine with other queries) to show the total number of items received per the job number on the same line. Eventually I'll use this number to change the status and other functions.
SELECT tblJobItems.JobNumber, tblJobItems.Item, tblJobItems.QTYNeeded, tblJobItems.PartStatus, First(tblJobs.BDT) AS FirstOfBDT, First(DateAdd("ww",-2,[BDT])) AS DueBy
FROM tblJobItems INNER JOIN tblJobs ON tblJobItems.JobNumber = tblJobs.JobNumber
GROUP BY tblJobItems.JobNumber, tblJobItems.Item, tblJobItems.QTYNeeded, tblJobItems.PartStatus;
This shows me in a listbox the items ordered and how many, the JobNumber is stored as ([Tempvars]![JobNum]), and the listbox only shows the records that match the JubNumber. (the tempvar is global, so it can be used in a query if that helps anyone)
I'm not opposed to having this go through two or three queries to get to the answer.
It turns out that the key piece needed in my query's SQL was:
Sum(tblReceived.ReceivedQTY) AS SumOfReceivedQTY, IIf(IsNull([SumofReceivedQTY]),0,[SumofReceivedQTY]) AS RECQTY
This sums up the quantity and also creates a new column in the query with the totals.