Could you please help me figuring out how to accomplish the following.
I have a table containing the number of products available between one date and another as per below:
TABLE MyProducts
DateProduct ProductId Quantity Price
26/02/2016 7 2 100
27/02/2016 7 3 100
28/02/2016 7 4 100
I have created a form where users need to select a date range and the number of products they are looking for (in my example, the number of products is going to be 1).
In this example, let's say that a user makes the following selection:
SELECT SUM(MyProducts.Price) As TotalPrice
FROM MyProducts WHERE MyProducts.DateProduct
Between #2/26/2016# And #2/29/2016#-1 AND MyProducts.Quantity>=1
Now the user can see the total amount that 1 product costs: 300
For this date range, however, I want to allow users to select from a combobox also the number of products that they can still buy: if you give a look at the Quantity for this date rate, a user can only buy a maximum of 2 products because 2 is the lowest quantity available is in common for all the dates listed in the query.
First question: how can I feed the combobox with a "1 to 2" list (in this case) considering that 2 is lowest quantity available in common for all the dates queried by this user?
Second question: how can I manage the products that a user has purchased.
Let's say that a user has purchased 1 product within this date range and a second user has purchased for the very same date range the same quantity too (which is 1) for a total of 2 products purchased already in this date range. How can I see that for this date rate and giving this case the number of products actually available are:
DateProduct ProductId Quantity Price
26/02/2016 7 0 100
27/02/2016 7 1 100
28/02/2016 7 2 100
Thank you in advance and please let me know should you need further information.
You could create a table with an integer field counting from 1 to whatever max qty you could expect. Then create a query that will only return rows from your new table up to the min() qty in the MyProducts table. Use that query as the control source of your combobox.
EDIT: You will actually need two queries. The first should be:
SELECT Min(MyProducts.Quantity) AS MinQty FROM MyProducts;
which I called "qryMinimumProductQty". I create the table called "Numbering" with a single integer field called "Sequence". The second query:
SELECT Numbering.Sequence FROM Numbering, qryMinimumProductQty WHERE Numbering.Sequence<=qryMinimumProductQty.MinQty;
AFAIK there is no Access function/feature that will fill in a series of numbers in a combobox control source. You have to build the control source yourself. (Anyone with more VBA experience might have a solution to solve this, but I do not.)
It makes me ache thinking of an entire table with a single integer column only being used for a combobox though. A simpler approach to the combobox would just to show the qty available in a control on your form, give an unbound text box for the user to enter their order qty, and add a validation rule to stop the order and notify them if they have chosen a number greater than the qty on hand. (Just a thought)
As for your second question, I don't really understand what you're looking for either. It sounds like there may be another table of purchases? It should be a simple query to relate MyProducts to Purchases and take the difference between your MyProducts!qty and the Purchases!qty. If you don't have a table to store Purchases, it might be warranted based on my cursory understanding of your system.
Related
I am stuck on something, which I have never used in my 10 years of SQL. I thought it would be useful if there was someway of doing this. Firstly I am running SQL Server Express (latest free version) on Windows. To talk to the database I am using SSMS.
There are three tables/queries.
1 table (A) has one data value I want to pull through.
2 tables (B)/(C) have multiple values.
Column common to all tables is CAMPAIGN NAME
Column common to (B)/(C) is PRODUCT NAME
This is an example of the data:
OUTPUT GOAL
I have tried the following:
UNION ALL (but this does not assist when I want to calculate AMOUNT - MARKETING - TOTAL INVESTMENT
I tried PARTITION (but I simple could now get it to work.
If I use joins, it brings through a head count / total investment and marketing cost per product, which when using SUM brings through the incorrect values for head count / total investment and marketing cost vs total amount, quantity.
I tried splitting the costs based on Quantity / Total Quantity or Amount / Total Amount, but the cost associated with the product is not correct or directly relating to the product this way.
Am I trying to do something impossible, or is there a way to do this in SQL?
The following comes pretty close to what you want:
select . . . -- select the columns you want here
from a join
b
on b.campaign_name = a.campaign_name join
c
on c.campaign_name = b.campaign_name and
c.product_name = b.product_name;
This produces a result set with a separate row for each campaign/product.
The Problem:
First create a table called amttopay that has three fields: rec_no, idno and amt (make amount a numeric field that can hold 3 decimal places. You are also going to use a copy of the donor table for this assignment. Take in a number that matches an idno on the donor table. Check the yrgoal for that record. If it is larger than 500 then double it to create a new goal and write four records on the amttopay table containing the quarterly payment number (1 through 4), the idno, and the quarterly amount to pay to achieve the new goal. If it is not larger than 500 then add 50% to the goal to make the new goal and process it by writing the four records with the same information.
I've created the table, and I understand I've gotta write PL/SQL code to accomplish this, but what I'm not understanding is how the question is worded.
"If it is larger than 500 then double it to create a new goal and write four records on the amttopay table containing the quarterly payment number (1 through 4), the idno, and the quarterly amount to pay to achieve the new goal."
What does that mean? How would I go about bringing logic into this?
Thanks so much for the help.
Assuming you are trying to actually understand the question, this is how you would do it:
Break your statement into parts:
Check the yrgoal for that record.
If it is larger than 500 then
double it to create a new goal
and write four records on the amttopay table containing the quarterly payment number (1 through 4), the idno, and the quarterly amount to pay to achieve the new goal.
If it is not larger than 500 then
add 50% to the goal to make the new goal
and process it by writing the four records with the same information.
Simplified, this gives the following:
Create new record
if yrgoal>500 then
double yrgoal
Create 4 records with idnoand the quarterly amount
else
yrgoal * 1.5
Create 4 records as before
The rest is up to you, of course …
What I am trying to do is fairly simple. I just want to add a row number to a query. Since this is in Access is a bit more difficult than other SQL, but under normal circumstances is still doable using solutions such as DCount or Select Count(*), example here: How to show row number in Access query like ROW_NUMBER in SQL or Access SQL how to make an increment in SELECT query
My Issue
My issue is I'm trying to add this counter to a multi-join query that orders by fields from numerous tables.
Troubleshooting
My code is a bit ridiculous (19 fields, seven of which are long expressions, from 9 different joined tables, and ordered by fields from 5 of those tables). To make things simple, I have an simplified example query below:
Example Query
SELECT DCount("*","Requests_T","[Requests_T].[RequestID]<=" & [Requests_T].[RequestID]) AS counter, Requests_T.RequestHardDeadline AS Deadline, Requests_T.RequestOverridePriority AS Priority, Requests_T.RequestUserGroup AS [User Group], Requests_T.RequestNbrUsers AS [Nbr of Users], Requests_T.RequestSubmissionDate AS [Submitted on], Requests_T.RequestID
FROM (((((((Requests_T
INNER JOIN ENUM_UserGroups_T ON ENUM_UserGroups_T.UserGroups = Requests_T.RequestUserGroup)
INNER JOIN ENUM_RequestNbrUsers_T ON ENUM_RequestNbrUsers_T.NbrUsers = Requests_T.RequestNbrUsers)
INNER JOIN ENUM_RequestPriority_T ON ENUM_RequestPriority_T.Priority = Requests_T.RequestOverridePriority)
ORDER BY Requests_T.RequestHardDeadline, ENUM_RequestPriority_T.DisplayOrder DESC , ENUM_UserGroups_T.DisplayOrder, ENUM_RequestNbrUsers_T.DisplayOrder DESC , Requests_T.RequestSubmissionDate;
If the code above is trying to select a field from a table not included, I apologize - just trust the field comes from somewhere (lol i.e. one of the other joins I excluded to simply the query). A great example of this is the .DisplayOrder fields used in the ORDER BY expression. These are fields from a table that simply determines the "priority" of an enum. Example: Requests_T.RequestOverridePriority displays to the user as an combobox option of "Low", "Med", "High". So in a table, I assign a numerical priority to these of "1", "2", and "3" to these options, respectively. Thus when ENUM_RequestPriority_T.DisplayOrder DESC is called in order by, all "High" priority requests will display above "Medium" and "Low". Same holds true for ENUM_UserGroups_T.DisplayOrder and ENUM_RequestNbrUsers_T.DisplayOrder.
I'd also prefer to NOT use DCOUNT due to efficiency, and rather do something like:
select count(*) from Requests_T where Requests_T.RequestID>=RequestID) as counter
Due to the "Order By" expression however, my 'counter' doesn't actually count my resulting rows sequentially since both of my examples are tied to the RequestID.
Example Results
Based on my actual query results, I've made an example result of the query above.
Counter Deadline Priority User_Group Nbr_of_Users Submitted_on RequestID
5 12/01/2016 High IT 2-4 01/01/2016 5
7 01/01/2017 Low IT 2-4 05/06/2016 8
10 Med IT 2-4 07/13/2016 11
15 Low IT 10+ 01/01/2016 16
8 Low IT 2-4 01/01/2016 9
2 Low IT 2-4 05/05/2016 2
The query is displaying my results in the proper order (those with the nearest deadline at the top, then those with the highest priority, then user group, then # of users, and finally, if all else is equal, it is sorted by submission date). However, my "Counter" values are completely wrong! The counter field should simply intriment +1 for each new row. Thus if displaying a single request on a form for a user, I could say
"You are number: Counter [associated to RequestID] in the
development queue."
Meanwhile my results:
Aren't sequential (notice the first four display sequentially, but then the final two rows don't)! Even though the final two rows are lower in priority than the records above them, they ended up with a lower Counter value simply because they had the lower RequestID.
They don't start at "1" and increment +1 for each new record.
Ideal Results
Thus my ideal result from above would be:
Counter Deadline Priority User_Group Nbr_of_Users Submitted_on RequestID
1 12/01/2016 High IT 2-4 01/01/2016 5
2 01/01/2017 Low IT 2-4 05/06/2016 8
3 Med IT 2-4 07/13/2016 11
4 Low IT 10+ 01/01/2016 16
5 Low IT 2-4 01/01/2016 9
6 Low IT 2-4 05/05/2016 2
I'm spoiled by PLSQL and other software where this would be automatic lol. This is driving me crazy! Any help would be greatly appreciated.
FYI - I'd prefer an SQL option over VBA if possible. VBA is very much welcomed and will definitely get an up vote and my huge thanks if it works, but I'd like to mark an SQL option as the answer.
Unfortuantely, MS Access doesn't have the very useful ROW_NUMBER() function like other clients do. So we are left to improvise.
Because your query is so complicated and MS Access does not support common table expressions, I recommend you follow a two step process. First, name that query you already wrote IntermediateQuery. Then, write a second query called FinalQuery that does the following:
SELECT i1.field_primarykey, i1.field2, ... , i1.field_x,
(SELECT field_primarykey FROM IntermediateQuery i2
WHERE t2.field_primarykey <= t1.field_primarykey) AS Counter
FROM IntermediateQuery i1
ORDER BY Counter
The unfortunate side effect of this is the more data your table returns, the longer it will take for the inline subquery to calculate. However, this is the only way you'll get your row numbers. It does depend on having a primary key in the table. In this particular case, it doesn't have to be an explicitly defined primary key, it just needs to be a field or combination of fields that is completely unique for each record.
My problem might be simple but i have been stuck on it for a while. I have a list of accounts in column B (XXXXXX). Then in column D i have a quantity of contracts traded. In the column E i have the prices of those contracts. The column next to it has the name of the product traded.
The way i get the raw data i sometimes get a trade split in 2 parts. For example i might have on one row for the same (column B) account XXXXXX , QTY(Column D) 2 and Price(column E) 5.23$ and security(column F) NKE. In the next row i have the same account XXXXX , QTY is 3 , Price is same and the security is same. I want something that will loop through the entire data and add the QTY to 5 and keep everything else the same. So at the end i should have one row with with account XXXXXX with QTY 5 Price 5.23$ and Security NKE. I have tried pivot tables but it adds the price of the security to 10.46$ and that messes up calculations. I cannot figure what sort of a macro i should use. Can someone please help. I am posting a picture to help understand the problem. THanks. enter image description here
A pivot should show you what you want. Don't put Price in VALUES. Account, Security and Price can go in ROWS then Sum of Quantity in VALUES. That should give you the breakdown you're after.
Choose the most unique column (probably F).
Filter your data by this column.
Make an infinite loop. Inside the loop:
declare a variable for row number
check if the current row has the same value in column F as the row below
if yes, add quantities in first row and delete second row
if no, add one to row number and check if there is something in the current row. If no, exit the loop.
To the person who posted a macro. Can you please repost? I was just writing a note to you and I see you deleted the comment
I have a report with a static choice on the prompt page. The user can choose 'Full Detail', or 'Summarised'.
For a simplified example, say my report has these columns: Customer, Product, Date, Quantity, Value.
I would like to be able to show/hide the Date column based on the detail level choice, and have the Quantity and Value columns aggregate into a single Customer/Product line. I know how to show/hide the column (tying the choice variable to the column's Render Variable), but this does not do the aggregation, only makes the column invisible.
I have thought about doing a separate report page for Full Detail and Summary, but in my actual report I have a second choice box with which the user can choose a field to summarise by (e.g. Customer or Product), and the report will section-group by that field. At the moment I am doing that one per page (5 of them). Doing the detail choice the same way would mean I would need 10 pages. There is surely a better way.
Full detail:
Customer Product Date Qty Value
ABCD Things 22/10/2014 10 1.00
21/10/2014 40 4.00
23/10/2014 50 5.00
Summarised (How it looks at the moment, after hiding the Date column):
Customer Product Qty Value
ABCD Things 10 1.00
40 4.00
50 5.00
Summarised (How I would like it to look):
Customer Product Qty Value
ABCD Things 100 10.00
I am using Cognos Report Studio 10.1.1
You should not just hide column.
You should also set same value for this column in all rows
Instead of just [Date] in this column set
if (?HideDate? = 1) then ('') else ([Date])
or, if you prefer CASE
case ?HideDate? when 1 then '' else [Date] end
replace ?HideDate? = 1 with you own condition
Alexey's answer is great if you are using the standard Cognos 'auto-group and summarize' functionality.
If you have a custom aggregate that includes the [Date] column in its definition, you might squeeze a bit of performance gain out of modifying the aggregate function itself to disregard the [Date] column when a summarized total is desired.
If your aggregate function was:
total([Value] for [Customer],[Product],[Date])
..you might change this to a CASE statement like so:
CASE ?HideDate?
WHEN 1 then total([Value] for [Customer],[Product])
ELSE total([Value] for [Customer],[Product],[Date])
END
The data items after a 'for' clause usually end up in a GROUP BY clause in the resultant SQL. Limiting the items grouped, when possible, can help performance. In this case the performance improvement would likely be slight since there will only be one distinct value in Alexey's solution, but it's something to consider.