SQL: Conditional Percentage Increase - sql

Using Bartender custom SQL, I am attempting to add 20% to a label price if it is VAT applicable (i.e. if it has a tax ID of 2583)
The information for tax is stored in one database table called StockItem.TaxCodeID, and the price is stored in another called StockItemPrice.Price.
Is there a way to make this happen? I'm very new to SQL and have gotten by so far using the query and join tools included with bartender, and the code it generates makes logical sense to me.
SELECT "dbo"."StockItem"."Code", "dbo"."StockItem"."Name", "dbo"."StockItem"."TaxCodeID", "dbo"."StockItem"."PartNumber", "StockItemPrice"."Price" FROM "dbo"."StockItem" , "StockItemPrice"
WHERE "dbo"."StockItem"."ItemID" = "StockItemPrice"."ItemID"
AND
("StockItemPrice"."PriceBandID" = 1001
AND "dbo"."StockItem"."Code" LIKE '6%'
AND "dbo"."StockItem"."PartNumber" LIKE '%?BarcodeSearch1%'
AND "dbo"."StockItem"."Name" LIKE '%?NameSearch%'
AND "dbo"."StockItem"."TaxCodeID" = 258
Sorry in advance if I haven't provided enough information, I'll do my best to add more if needed!

Use case when statement,
select *, CASE taxid
WHEN taxid=2538 THEN price *1.20
else price
END as newcolumn
from stockitem

Related

My Joins in query not pulling through correctly

Good evening. Could someone please help me with the following. I am trying to join two tables.The first id wbr_global.gl_ap_details. This stores historic GL information. The second table sandbox.utr_fixed_mapping is where account mapping is stored. For example, ana ccount number 60820 is mapped as Employee relation. The first table needs the mapping from the second table linked on the account number. The output I am getting is not right and way to bug. Any help would be appreciated!
Output
select sandbox.utr_fixed_mapping_na.new_mapping_1,sum(wbr_global.gl_ap_details.amount)
from wbr_global.gl_ap_details
LEFT JOIN sandbox.utr_fixed_mapping_na ON wbr_global.gl_ap_details.account_number = sandbox.utr_fixed_mapping_na.account_number
Where gl_ap_details.cost_center = '1172'
and gl_ap_details.period_name = 'JUL-21'
and gl_ap_details.ledger_name = 'Amazon.com, Inc.'
Group by 1;
I tried adding the cast function but after 5000 seconds of the query running I canceled it.
The query itself appears ok, but minor changes. Learn to use table "aliases". This way you don't have to keep typing long database.table.column all over. Additionally, SQL is easier to read doing it that way anyhow.
Notice the aliases "gl" and "fm" after the tables are declared, then these aliases are used to represent the columns.. Easier to read, would you agree.
Added GL Account number as described below the query.
select
gl.account_number,
fm.new_mapping_1,
sum(gl.amount)
from
wbr_global.gl_ap_details gl
LEFT JOIN sandbox.utr_fixed_mapping_na fm
ON gl.account_number = fm.account_number
Where
gl.cost_center = '1172'
and gl.period_name = 'JUL-21'
and gl.ledger_name = 'Amazon.com, Inc.'
Group by
gl.account_number,
fm.new_mapping_1
Now, as for your query and getting null. This just means that there are records within the gl_ap_details table with an account number that is not found in the utr_fixed_mapping_na table. So, to see WHAT gl account number does NOT exist, I have added it to the query. Its possible there are MULTIPLE records in the gl_ap_details that are not found in the mapping table. So, you may get
GLAccount Description SumOfAmount
glaccount1 null $someAmount
glaccount37 null $someAmount
glaccount49 null $someAmount
glaccount72 Depreciation $someAmount
glaccount87 Real Estate $someAmount
glaccount92 Building $someAmount
glaccount99 Salaries $someAmount
I obviously made-up glaccounts just to show the purpose. You may have multiple where the null's total amount is actually masking how many different gl account numbers were NOT found.
Once you find which are missing, you can check / confirm they SHOULD be in the mapping table.
FEEDBACK.
Since you do realize the missing numbers, lets consider a Cartesian result. If there are multiple entries in the mapping table for the same G/L account number, you will get a Cartesian result thus bloating your numbers. To clarify, lets say your mapping table has
Mapping file.
GL Descr1 NewMapping
1 test Salaries
1 testView Buildings
1 Another Depreciation
And your GL_AP_Details has
GL Amount
1 $100
Your total for the query would result in $300 because the query is trying to join the AP Details GL #1 to EACH of the entries in the mapping file thus bloating the amount. You could also add a COUNT(*) as NumberOfEntries to the query to see how many transactions it THINKS it is processing. Is there some "unique ID" in the GL_AP_Details table? If so, then you could also do a count of DISTINCT ID values. If they are different (distinct is lower than # of entries), I think THAT is your culprit.
select
fm.new_mapping_1,
sum(gl.amount),
count(*) as NumberOfEntries,
count( distinct gl.UniqueIdField ) as DistinctTransactions
from
wbr_global.gl_ap_details gl
LEFT JOIN sandbox.utr_fixed_mapping_na fm
ON gl.account_number = fm.account_number
Where
gl.cost_center = '1172'
and gl.period_name = 'JUL-21'
and gl.ledger_name = 'Amazon.com, Inc.'
Group by
fm.new_mapping_1
Might you also need to limit the mapping table for a specific prophecy or mec view?
If you "think" that the result of an aggregate is wrong, then the easiest way to verify this is to select the individual rows that correlate to 1 record in the aggregate output and inspect the records, looking for duplications.
For instance, pick 'Building Management':
SELECT fixed.new_mapping_1,details.amount,*
FROM wbr_global.gl_ap_details details
LEFT JOIN sandbox.utr_fixed_mapping_na fixed ON details.account_number = fixed.account_number
WHERE details.cost_center = '1172'
AND details.period_name = 'JUL-21'
AND details.ledger_name = 'Amazon.com, Inc.'
AND details.account_number = 'Building Management'
Notice that we tack on a ,* to the end of the projection, this will show you everything that the query has access to, you should look for repeating sections of data that you were not expecting, then depending on which table they originate from your might add additional criteria to the JOIN, or to the WHERE or you might need to group by additional columns.
This type of issue is really hard to comment on in a forum like this because it is highly specific to your schema, and the data contained within it, making solutions highly subjective to criteria you are not likely to publish online.
Generally if you think a calculation is wrong, you need to manually compute it to verify, this above advice helps you to inspect the data your query is using, you should either construct your own query or use other tools to build the data set that helps you to manually compute the correct values, then work them back into or replace your original query.
The speed issues are out of scope here, we can comment on the poor schema design but I suspect you don't have a choice. In the utr_fixed_mapping_na table you should make the account_number have the same column type as the source data, or add a new column that has the data in the original type, then you can setup indexes on the columns to improve the speed of the join.

Running Sum Query

I'm new to Access and I'm trying to develop my own Inventory Management Database.
I'm trying to make a query that could display a running total of the Inventory on Hand as of a specific date. This is how my table looks:
It's sorted according to ITEM_ID then TRANDATE in ascending order. I'd like to add a calculated field beside the NET field that would show a running total of the specific ITEM_ID after a specific date. Negative numbers in the NET field represent a sale while the positive ones represent a purchase. I tried using the DSUM function as it is widely recommended in creating a running sum field. My expression is this
DSum([NET],"InvtyTransT", "[ITEM_ID]=" & [ITEM_ID] And "[TRANDATE]<=#" & [TRANDATE] & "#"). But it only shows the total of the NET field (6827) in each record like this:
What I needed is like this:
(I used an IF function in excel to compute this)
Please help. I think I might have missed something in my expression. I've tried revising it several times and it would always give me the same wrong answer in every record.
Thanks in advance.
Try correlated sub-query.
SELECT t.*, (SELECT SUM(t2.NET)
from InvtyTransT as t2
WHERE (t2.TRANDATE <= t.TRANDATE AND t2.ITEM_ID = t.ITEM_ID)
) AS rSUM
FROM InvtyTransT AS t;

SQL :Write a function to return value based on business rule

I am trying to figure out the way in writing a function to do the following in the best possible way.
I need to write a function that will return me the exchange name. It will be referred in my view query below
select Exchange,ISIN,Investment_Codename,PROPORTION_NEWCASH,PROPORTION_MIDCAP,PROPORTION_SMALLCAP,PROPORTION_LARGECAP from FundPrice
Following are the rules of my function
1. If fund type=Listed Equity, AIM, Investment Company, Investment Trust, VCT or ETP and Update code=FinexDD/MM/YYYY
should rturn LSE
For anything else apart from the updatecode mentioned above with Fund Type = Listed Equity, need to take left two letters of the ISIN Code to indicate the country e.g. Microsoft=US5949181045, Michelin=FR0000121261 and infer the exchange name based on that
(CASE WHEN UpdatedCode <> 'LSE' THEN LEFT(Investment_Codename, 2)) AS [Country Code]
I think I understood your question. The above checks to see if UpdatedCode is NOT LSE, if it isn't it will take the Investment Code name, and present the first 2 characters. E.g. GB.

Access 2013 SQL to perform linear interpolation where necessary

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.

Calculate result from multi table in database

I have a question in my VB.NET POS Development and could't find a solution myself. I'm currently using VS2010 and MS Access as my database.
I have two database table as shown below:
SalesReceipt(#Receipt_ID, Sales_Date, Receipt_Number, Customer_ID, Sales_BDiscount, Sales_ADiscount, Sales_Payment)
Customer(#Customer_ID, Customer_Name, Customer_Contact, Customer_Debt)
NOTE : BDiscount = Before Discount / ADiscount = After Discount
In my system, one customer can have many SalesReceipt. Now my problem is how can I update the correct Customer_Debt for customer? My logic is update the respective customer's Customer_Debt by looping every row in SalesReceipt and calculate the debt by doing something like :
totalDebt = totalDebt + (Sales_Payment - Sales_ADiscount)
But I not sure how can I make sure it only loop and calculate the result for the selected customer only. How can I achieve this correctly in .NET?
If you want to calculate totalDebt per customer you can use query
SELECT Customer_ID, sum(Sales_Payment - Sales_ADiscount) as totalDebt FROM SalesReceipt
GROUP BY Customer_ID
Result contains totalDebts aggregated by Customer_ID and can be used to update Customer (all the looping and calculating is done by a database engine).
The query can also update be more complex to do even update for you.
Couldn't you just write a query in your Access db that performs your calculation (Sales_Payment - Sales_ADiscount) on your SalesReceipt table grouped by CustomerID?