I have a database that is tracking medical samples, you can think of each sample like a unique serial number.
The design: I have 3 tables (Inventory, InventoryTransactions, Manifests).
please see the attaced photo.
Inventory: has all the items and their properties either we have it right now or had it before, you can think of it as products.
Manifests: It records the transfer of multiple blocks at once from a place to another place and it records the type of movement(Transfer, Sale, Return,Received, Replacement) you can think of it as orders.
(Transfer and Received) mean that this SKU is in the company, but (sale, return, Replacement) mean that this SKU is going outside.
Inventory transaction is the conjunction table between the two tables which relates which SKU is transfered in which Manifest, You can think of it as OrderDetails.
example : we have item 1A we received at manifest m1, then transfered to another warehouse in the company in manifest m2, then sold to a customer in manifest m3.
What I want is that I want to query the items that is in hand right now, In any warehouse of the company, but as you see in my example if the where clause is movement = 'received' or movement = 'transfer')
doesn't give me correct information because the SKU maybe sold later.
I have an idea for a solution: which pulls the latest movement for an SKU and if it's not going outside the company we can assume it's "in" the company. but I think this is a flawed solution.
This is a MS Access Database, but I am familiar with SQL Statements, I want to know how logically this can be achieved.
sorry for my English. I hope I have expressed myself right.
Update: This is My solution
SELECT Inventory.ID, Last(Manifests.MovementID) AS Lmove
FROM Manifests INNER JOIN (Inventory INNER JOIN InventoryTransactions ON Inventory.ID = InventoryTransactions.SKUID) ON Manifests.ID = InventoryTransactions.ManifestID
GROUP BY Inventory.ID
HAVING (((Last(Manifests.MovementID))<>2 And (Last(Manifests.MovementID))<>3 And (Last(Manifests.MovementID))<>5));
where 2,3,5 is the outgoing movements IDs
The expected result is all the items that we received but didn't sell yet.
here some samples from every table
"Inventory"
SKU
TS-15 - 0415-A
"InventoryTransactions"
SKUID ManifestID
TS-15 - 0415-A NHSBC 1316 081915
TS-15 - 0415-A Medimmune (PO # A-20190)
"Manifests"
ID MovementID
NHSBC 1316 081915 Received
Medimmune (PO # A-20190) Sale
In this sample "TS-15 - 0415-A" is received in the manifest "NHSBC 1316 081915" and then sold at the manifest "Medimmune (PO # A-20190)"
the ideal result shouldn't include "TS-15 - 0415-A" i the query because right now it's sold, therefore we don't have it in our inventory.
I have a few tables I am querying, Item movement, and price. There are three price levels, regular price, reduced price, and sale price. I am attempting to get a markdown (price that item sold at when on sale minus either the regular or reduced price). My item movement table contains only the price the unit sold at and the price type of that sale. I am currently selecting only the items that sold on the sale price type. Next I have to find out whether the item was on a regular or reduced price, which I determine by looking at my price table. The price table has my regular price and reduced price and if the reduced price is null then it is not currently reduced.
How do I tell SQL that I want a column named "markdown" that is essentially (IF price.tprprice not null AND price.tprenddate > #StartDate give me column (price.baseprice - price.tprprice) * itemmovement.qtysold AS markdown ELSE give me column (price.baseprice - itemmovement.price) * itemmovement.qtysold AS markdown)
I need to return the result of each calculation performed on each row into the same column titled Markdown.
Can anyone tell me how this query should be structured?
case when price.tprprice is not null AND price.tprenddate > #StartDate
then (price.baseprice - price.tprprice) * itemmovement.qtysold
else (price.baseprice - itemmovement.price) * itemmovement.qtysold
end as markdown
You would do it with a case statement which works in most databases.
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 have a report that is supposed to show the Stock Value of products before and after conversion.
I have the source products product code and stock value displayed on the form, now I need to get the value of the items converted from that one piece of stock.
I assumed this would be possible to achieve using some simple SQL to calculate the sum of all resulting products with the same SCID (Stock Conversion ID). My SCID is used to link a source product to a number of resulting products in a different table.
In this image I have named the SCID boc in the detail section sSCID to try and differentiate it from any fields in tables that it may try to pick up. But basically I need to get the code to look for result products that match the SCID displayed in that box and add them all together to get the sum total of converted stock.
If context helps I am trying to create a form that shows the value of stock before and after a conversion process in order to try and calculate the wastage.
Thanks,
Bob P
You can either use DSum or build your report query to include the calculation. I would prefer the second option. This assumes that SCID is numeric, you would need quotes for a text SCID.
=DSum("sValue","[Stock Conversion Items]","SCID=" & sSCID)
Or
SELECT r.This,r.That,s.ConvValue
FROM ReportTable r
INNER JOIN (
SELECT SCID, Sum(sValue) As ConvValue
FROM [Stock Conversion Items]
GROUP BY SCID) s
ON r.sSCID = s.SCID
The above query uses aliases r and s for the tables : ReportTable r or ReportTables As r
I have a lookup table called supplier, which has all of my suppliers information.
I also have a lookup table called materials, which has all of my materials information.
I'm creating another table called supplier_quote in which I will store 3 suppliers with at least 3 raw materials each as well as price and quantity.
the purpose of this is that the user in visual basic can call 1 supplier and get a price for each of the 3 materials, call the next supplier and input the price of the same 3 materials and again with the 3rd supplier.
I was thinking a drop down box in the form to display each suppliers name and raw material, but so far I can't seem to understand the logic behind it.
I need something like this:
supplier 1
raw material A. $23
raw material B. $25
raw material C $30
supplier 2
raw material A. $22
raw material B. $21
raw material c. $35
supplier 3
raw material A. $23
raw material B. $32
raw material C. $29
all that information would be one record in the supplier_quote table, because it all goes in one same quote. the prices are input by the person doing the quote, so I'm guessing they get stored in this same table.
anyone please help? I appreciate it in advance. I'm using visual basic 2010 and SQL 2008.
Quote (just some ideas on what I may track but this is where requirements need clarification)
ID
Name
Reason for quote (Why do you need this quote?)
Requested By (who's asking for it perhaps linked back to user?)
For Project #... (Do you track these to a specific project or RFP?)
Due By Date (when do all the proposals from vendors need to be returned by?)
Etc...
Request For Proposal # (internally how do you track quote requests ?)
Supplier
ID
Name
Material
ID
Name
Supplier_Quote
Quote_ID
Supplier_ID
StartDate (Date supplier pricing is good form)
EndDate (date supplier pricing is good to leave null if open ended.)
Supplier_Quote_Materials
Quote_ID
Supplier_ID
Material_ID
Price
Quantity limits etc...
User Interface:
User enters "Quote Maintenance transaction"
tabbed interface or multiple sections you decide.
Tab 1 - Quotes
Search
Quote Listing Results (when selected detail section is updated to reflect selection)
Detail (Add/Delete/save buttons)
Tab 2 - Suppliers ( Disabled until a quote is selected on tab 1)
Search
Supplier Listing Results (when selected detail section is updated to reflect selection)
Detail (Add/Delete/Save buttons)
Tab 3 - Materials (disabled until a supplier is selected on tab 2)
Search
Materials Listing (when selected detail section is updated to reflect selection)
Detail (add/Delete/Save buttons
The relationships between quote, supplier and materials is maintained though sections/tabs. thus a user is adding suppliers to quotes, and then materials to suppliers which are related to quotes.