I need to write a SQL query that pulls from a table that stores records for each time one of our salespeople speaks to a client. The relevant columns are: (1) the salesperson's employee ID, (2) the client's account number, and (2) the date of the conversation.
It's often the case that salespeople have spoken to clients multiple times within the report period (a calendar month) so there will be several entries that are nearly identical except for the date.
Where I'm getting tripped up is that, for the purpose of this query, I need to return only one record per salesperson/client combination, but I can't use DISTINCT because I need to include the date of the most recent conversation within the reporting period.
So, if salesperson John has spoken to client ABC on 10/10, 10/18, and 10/25 I need to pull the 10/25 record but not the others.
It's a Sybase database.
I have the feeling that I may be missing something simple here but I've tried searching and remain stumped. Any help is greatly appreciated.
Thanks for your time,
John
Guessing at the column names...
SELECT employee_id, client_acct_no,
MAX(conversation_date) AS MOST_RECENT_CONV_DATE
FROM mytable
WHERE conversation_date BETWEEN DATE '2010-10-01' AND DATE '2010-10-31'
GROUP BY employee_id, client_acct_no
Documentation for GROUP BY clause.
Related
I am creating an Access Database from a very complex Excel Spreadsheet. The process has been going well until I got to this problem. The solution is easy in Excel, but I cannot figure out how to do it in Access.
Here is what I had before in Excel.
I had a list of Customers on one sheet with multiple fields. I then had another sheet act as a report that would run a VBA macro to search through the table of all customers and list out every customer by name that was an inbound call from our contact center (Que Call), when that call came and then would calculate a third column for the number of days between calls. This last column is where I am running into difficulties translating to Access. In Excel, I would just have it do something like in cell C3 =SUM(B3-B2). Given that the table looked like this:
Column A Column B Column C
Row 1 Name Date Time Lapse
Row 2 Customer 1 7/1/2019 ----------
Row 3 Customer 2 7/2/2019 =SUM(B3-B2) <-- 1 day
Row 4 Customer 3 7/4/2019 =SUM(B4-B3) <-- 2 days
In Access:
I have a report that goes through my table of customers and lists off only those from our contact center (Que Call), but I can't figure out how to put in the calculation of time between calls as the design only allows me to affect one row. How do I make this calculation? Is it a SQL query that I need to do? I would prefer to not have to have a separate table for call center calls or a separate column in my customers table to calculate this as some customers are not from the call center. Can I just run a report or a query. Any advise or help would be greatly appreciated.
Current SQL Code:
SELECT
[Customers].FullName,
[Customers].ID,
[Customers].QueCall,
[Customers].Status,
[Customers].InterestLevel,
[Customers].State,
[Customers].Product,
[Customers].Created,
[Customers].LastContact,
[Customers].PrimaryNote
FROM
Customers
WHERE
((([Customers].QueCall)=True));
ORDER BY
[Customers].Created;
Describe exactly how it isn't working (error message, unexpected results, etc...)
It just lists out the customers and does not allow me to calculate the difference between when the records were created (ie when they were first contacted). I have found many things online about how to calculate the difference between two columns of the same record, but not between two different records; nor two different records that may not be sequentially after each other as there may be other non Que Call customers between records in the customer table.
Describe the desired results
I would like to have a column in the end report that shows how many days lapsed between records that were que calls.
Thank you in advance for any input that you may have.
Consider a correlated aggregate subquery where an inner query from same source, Customer, is correlate with outer query by same ID (assumed to be unique identifier) with date comparison (assumed to be Created field). Notice the use of table alias, c and sub for the correlation.
Use DateDiff for difference between dates. To use this query, place below query into the SQL mode of Query Designer and save the object to be used as recordsources to forms, reports, opened on its own, or used in application code as recordsets.
SELECT
c.FullName,
c.ID,
c.QueCall,
c.Status,
c.InterestLevel,
c.State,
c.Product,
c.Created,
c.LastContact,
c.PrimaryNote,
(SELECT TOP 1 SUM(DateDiff("d", sub.Created, c.Created))
FROM Customer sub
WHERE sub.ID = c.ID
AND sub.Created < c.Created
GROUP BY sub.Created
ORDER BY sub.Created DESC) AS TimeElapsed
FROM
Customers c
WHERE
(((c.QueCall)=True));
ORDER BY
c.Created;
Do be aware for large tables this correlated subquery can be taxing in time and performance. Allow time to complete and look into storing output in a temp table with a Make-Table Query to avoid re-run.
I am trying to write a query to find out whether a record exist more than one or not in a given period of time. And even if it exist, how many times the same record has been repeated.
Now to solve this issue, I have sorted the records.
select * from table_name where date = ? and date > ? order by email
And trying to count the number of times the same record exist.But I am not able to figure out a way to count the number of times the same record exists.
Here is a problem.The image below holds the basic data structure.
Here is the expected output for a year
The table above holds Xyz name and xyz#email.com data three times. And the name Abc and email abc#email.com two times and the third record name Def and email def#email.com two times. Now what I am trying to figure out a way to find out the number of times each records are being repeated in a given period of time using a single query. I am thinking to make use of recursion on a record and count till it didn't find a different record after sorting it. But using recursion on every records seems expensive.
Is there a better solution to solve this problem ?
Regards
Group and count.
SELECT column_to_compare1, column_to_compare2, COUNT(*)
FROM table_name
WHERE [date] BETWEEN #date1 AND #date2
GROUP BY column_to_compare1, column_to_compare2
HAVING COUNT(*) > 1 -- IF YOU WANT TO ONLY INCLUDE RECORDS WITH DUPLICATES
Between is inclusive, so you can adjust your dates with DATEADD if you really want between.
You can use the COUNT function to do this.
To do this using your own query:
SELECT Name, Email, COUNT(*) AS count
FROM table_name
WHERE date BETWEEN '01/01/2005' AND '31/12/2005'
GROUP BY Name, Email
However your example query is poor so I cannot give you a better solution. Here is an example of this working: SQL Fiddle
EDIT: Updated my solution to match you expected output.
I need help with a query (and its' subquery). Each record in the table can have one or more identifiers, each of which having its own expiration date. I want to count how many records only have expired identifier dates, no matter how many there are (all are expired). I think that I'm not eliminating the records that have several identifiers where one is expired but the others are current.
SELECT COUNT(IDENTIFIER_ROWID)
FROM BO_IDENTIFIER_TABLE
WHERE (SELECT DISTINCT IDENTIFIER_ROWID
FROM BO_IDENTIFIER_TABLE WHERE IDENT_END_DT < (sysdate)
And that is where I get stuck. I know I need a subquery to bring back the profiles with only old/expired dates, and then count those up in the main query, but I'm not writing it correctly. Help would be greatly appreciated!
Something like this? Counts distinct records not found in a subquery with unexpired IDs. http://sqlfiddle.com/#!4/81611/2/0
I am using a transaction table called Student_Details which contain Batch_No, PF_No, Emp_name,DOB, DOR and DOJ along with other details. There is another master table called Batch_Master which contains Batch_No, From_date, To_date and Due_date.
I want to get the details of staff whose due date is within Enter_date1 and Enter_date2 who actually fall due within this period and such of those staff whose due_date is earlier to Enter_date1 but still not come (i.e there is no record for the same person with a DOJ after due_date.)
Please help in designing a query in MS-Access
You should look specifically at SQL WHERE clause. I think this would be most beneficial for what you are trying to achieve. WHERE is used in these types of conditional statements to say if this is true (or false depending on the situation) then return this.
For example:
SELECT *
FROM <location>
WHERE Due_date > Enter_date1 AND Due_date < Enter_date2.
However I am really confused on this statement:
"such of those staff whose due_date is earlier to Enter_date1 but still not come (i.e there is no record for the same person with a DOJ after due_date"
To me this sounds like you just want to return every less than Enter_date2, but you want to ensure that there is only Unique records return... or so I assume.
I am trying to develop a SQL Server 2005 query but I'm being unsuccessful at the moment. I trying every different approach that I know, like derived tables, sub-queries, CTE's, etc, but I couldn't solve the problem. I won't post the queries I tried here because they involve many other columns and tables, but I will try to explain the problem with a simpler example:
There are two tables: PARTS_SOLD and PARTS_PURCHASED. The first contains products that were sold to customers, and the second contains products that were purchased from suppliers. Both tables contains a foreign key associated with the movement itself, that contains the dates, etc.
Here is the simplified schema:
Table PARTS_SOLD:
part_id
date
other columns
Table PARTS_PURCHASED
part_id
date
other columns
What I need is to join every row in PARTS_SOLD with a unique row from PARTS_PURCHASED, chose by part_id and the maximum "date", where the "date" is equal of before the "date" column from PARTS_PURCHASED. In other words, I need to collect some information from the last purchase event for the item for every event of selling this item.
The problem itself is that I didn't find a way of joining the PARTS_PURCHASED table with PARTS_SOLD table using the column "date" from PARTS_SOLD to limit the MAX(date) of the PARTS_PURCHASED table.
I could have done this with a cursor to solve the problem with the tools I know, but every table has millions of rows, and perhaps using cursors or sub-queries that evaluate a query for every row would make the process very slow.
You aren't going to like my answer. Your database is designed incorrectly which is why you can't get the data back out the way you want. Even using a cursor, you would not get good data from this. Assume that you purchased 5 of part 1 on May 31, 2010. Assume on June 1, you sold ten of part 1. Matching just on date, you would match all ten to the May 31 purchase even though that is clearly not correct, some parts might have been purchased on May 23 and some may have been purchased on July 19, 2008.
If you want to know which purchased part relates to which sold part, your database design should include the PartPurchasedID as part of the PartsSold record and this should be populated at the time of the purchase, not later for reporting when you have 1,000,000 records to sort through.
Perhaps the following would help:
SELECT S.*
FROM PARTS_SOLD S
INNER JOIN (SELECT PART_ID, MAX(DATE)
FROM PARTS_PURCHASED
GROUP BY PART_ID) D
ON (D.PART_ID = S.PART_ID)
WHERE D.DATE <= S.DATE
Share and enjoy.
I'll toss this out there, but it's likely to contain all kinds of mistakes... both because I'm not sure I understand your question and because my SQL is... weak at best. That being said, my thought would be to try something like:
SELECT * FROM PARTS_SOLD
INNER JOIN (SELECT part_id, max(date) AS max_date
FROM PARTS_PURCHASED
GROUP BY part_id) AS subtable
ON PARTS_SOLD.part_id = subtable.part_id
AND PARTS_SOLD.date < subtable.max_date