I now have tried DLookUp, but I do not get the result I want.
My Situation: I am creating a database for a cinema. It includes tables named cinemas, movies, sold seats, price.
I have made a form where I can record a new "guest". I can select the ID of the Show and then I see the date and the time. I now have recorded some guests and now there should be less seats free. I want to show that on the same form as the one where I record new guests. I don't get up with the Dlookup.
I have made this query which calculates how many seats are left but I cannot put that into the form.
SELECT
tbl_Vorstellung.ID_Vorstellung,
tbl_Kino.Kino,
Sum([tbl_Kino]![Sitzplätze]-[qry(02)PlätzeVerkauft]![AnzahlvonTicketNummer]) AS Ausdr1
FROM
tbl_Kino
INNER JOIN ([qry(02)PlätzeVerkauft]
INNER JOIN tbl_Vorstellung
ON [qry(02)PlätzeVerkauft].ID_Vorstellung = tbl_Vorstellung.ID_Vorstellung)
ON tbl_Kino.ID_KINO = tbl_Vorstellung.FS_KINO
GROUP BY
tbl_Vorstellung.ID_Vorstellung,
tbl_Kino.Kino;
Save your working query as a new name, for this example MyQuery
Then use
DLOOKUP("Ausdr1", "MyQuery", "ID_Vorstellung=SomeValue AND Kino=SomeValue")
On your form. You'll have to put in the SomeValue values based on fields on your form, etc.
Related
I have a query i have been working on trying to get a specific set of data, join the comments in duplicate phone numbers of said data, then join separate tables based on a common field "entry_id" which also happens to be the number on the end of the word custom_ to pull up that table.
table named list and tables containing the values i want to join is custom_entry_id (with entry_id being a field in list in which i need the values of each record to replace the words in order to pull up that specific table) i need entry_id from the beginning part of my query to stick onto the end of the word custom for every value my search returns to get the fields from that custom table designated for that record. so it will have to do some sort of loop i guess? sorry like i said I am at a loss at this point
this is where i am so far:
SELECT * ,
group_concat(comments SEPARATOR '\r\n\r\n') AS comments_combined
FROM list WHERE `status` IN ("SALEA","SALE")
GROUP BY phone_number
//entry_id is included in the * as well as status
// group concat combines the comments if numbers are same
i have also experimented on test data with doing a full outer join which doesnt really exist. i feel if you can solve the other part for me i can do the joining of the data with a query similar to this.
SELECT * FROM test
LEFT JOIN custom_sally ON test.num = custom_sally.num
UNION
SELECT * FROM test
RIGHT JOIN custom_sally ON test.num = custom_sally.num
i would like all of this to appear with every field from my list table in addition to all the fields in the custom_'entry_id' tables for each specific record. I am ok with values being null for records that have different custom fields. so if record 1 has custom fields after the join of hats and trousers and record 2 has socks and shoes i realize that socks and shoes for record 1 will be null and hats and trousers for record 2 will be null.
i am doing all this in phpmyadmin under the SQL tab.
if that is a mistake please advise as well. i am using it because ive only been working with SQl for a few months. from what i read its the rookie tool.
i might be going about this all wrong if so please advise
an example
i query list with my query i get 20,000 rows with columns like status, phone_number, comments, entry_id, name, address, so on.
now i want to join this query with custom fields in another table.
the problem is the custom tables' names are all linked to the entry_id.
so if entry_id is 777 then the custom table fields are custom_777
my database has over 100 custom tables with specials fields for each record depending on its entry_id.
when i query the records I don't know how to join the custom fields that are entry_id specific to the rest of my data.i will pull up some tables and data for a better example
this is the list table:
this is the custom_"entry_id"
Full Outer Join in MySQL
for info on full outer joins.
I made a fairly simple database in access that contains the stock, customers, sales order, sales order item tables from a fictional company.
I want to reduce the stock level by using a customer/sales order form. however, if I try to do this, it reduces the "stock_level" from all records within the form.
I tried the following query to do it:
UPDATE stock
INNER JOIN Sales_order_item ON stock.stock_ID = Sales_order_item.fk2_stock_ID
SET stock.Stock_level = [stock]![Stock_level]-[Quantity_Ordered]
WHERE (((stock.stock_ID)=[Forms]![Sales Order SubForm]![fk2_stock_ID]));
And this is the stock table:
thanks for looking into it, I'm completely stuck on this matter!
I need to change the value of a Calculated FIELD depending on the results from a separate table.
I made up a small Fake DB(attached) to highlight my problem..
When the Database is open I want to be able to show on the first screen if ALL training is up to date for each employee, by changing the value of the "Calculated Field".
I have 5 Employees.
Each Employees must do 5(or more) training's.
All Training's must NOT be expired.
If a single training is expired Change Calculated Field Value to "NO GOOD"
If ALL training is NOT expired Change Calculated Field Value to "ALL GOOD"
I have no Idea on how to approach this scenario. Do I need to create a separate "Temp Table" to store this value?
Database found HERE: http://1drv.ms/1tX7L9M
I can't link pictures or more than 2 links yet so please look at these:
http://1drv.ms/1tXhr45
Here is my query.
SELECT Training.ID, Training.EmployeeID, Employees.Name, Training.TrainingID, Training.TrainingDate, TrainingList.Frequency, DateAdd("m",[frequency],[TrainingDate]) AS DueDate
FROM Employees INNER JOIN (Training INNER JOIN TrainingList ON Training.TrainingID = TrainingList.TrainingID) ON Employees.EmployeeID = Training.EmployeeID;
I need to check that all training for each Employee is current. If it is then I need to show this by changing the value from my first form.. The record source of the first form is like this:
SELECT DISTINCTROW Employees.ID, Employees.Name, Employees.EmployeeID, "Help With This Field" AS TrainingStatus
FROM Employees;
The Purpose of this is to make my life easier and be able to see at a glance which employees need to do recurrent training and which are up to date.. I still can't visualized how this can be done.. I am a (Google is my teacher kind of access user :( )
You have a query which computes the DueDate for all training records. Use it as the data source for another query in which you restrict the results to only those records whose DueDate has not already passed.
SELECT tq.*
FROM [Training Query] AS tq
WHERE (((tq.DueDate)>=Date()));
If that query returns the correct records --- only those trainings which have not expired --- reuse its WHERE clause in a GROUP BY query where you count up the number of unexpired trainings per each employee.
SELECT tq.EmployeeID, Count(tq.TrainingID) AS CountOfTrainingID
FROM [Training Query] AS tq
WHERE (((tq.DueDate)>=Date()))
GROUP BY tq.EmployeeID;
If that query also produces sane results, you can use an IIf expression to return "ALL GOOD" when CountOfTrainingID >= 5 and "NO GOOD" when it's < 5.
SELECT
sub.EmployeeID,
sub.CountOfTrainingID,
IIf(
sub.CountOfTrainingID >= 5,
'ALL GOOD',
'NO GOOD'
) AS TrainingStatus
FROM
(
SELECT tq.EmployeeID, Count(tq.TrainingID) AS CountOfTrainingID
FROM [Training Query] AS tq
WHERE (((tq.DueDate)>=Date()))
GROUP BY tq.EmployeeID
) AS sub;
That should get you most of the way to your goal. You would still need to join in the Employees table to get their names.
There may be other issues which you still need to address:
If an employee has not yet completed any trainings, or all his trainings have expired, should his name appear in the query (and form based on that query)?
Is your criteria based on 5 or more different trainings? For example, if an employee completed only the same training 5 times in the past month, should his TrainingStatus be good or no good?
I have in my database a table called rooms that contain the rooms information and property ,and another table called reservation table that contain the Room Reserved, FromDate and ToDate .
What i want to do is to make the user pick room size that he want to reserve and pick the date for reserving the room ,then i provide for him the available rooms depend on the Room Reservation table.
here what i did:
SELECT * FROM Rooms,Reservations WHERE
Rooms.R_Size = 'roomSize' AND ('4/19/2013' NOT
BETWEEN Reservation.FromDate AND Reservation.ToDate AND '4/19/2013'
NOT BETWEEN Reservation.FromDate AND Reservation.ToDate)
The problem its return to me duplicate's rooms and even if its between the reserved date in specific reservation but its not between reserved date in another reservation still it will return it to me.
What i want is to check if the room is reserved at the same or between a specif date and if it is i don't want it to be selected and returned at all.
Thanks.. and sorry for my poor english
There are two problems with your query. One is that there is no condition on the join between rooms and reservations, such that rooms of the correct size will be returned once for each reservation satisfying the date tests. Another problem is that your date test is wrong as it will not detect existing reservations that is completely within the date interval of the new reservation.
A query like this one should give you the result you want:
SELECT * FROM Rooms
LEFT JOIN Reservations
ON Reservations.R_Number = Rooms.Number
AND Reservations.ToDate > '4/19/2013'
AND Reservations.FromDate < '4/20/2013'
WHERE Rooms.R_Size = 'roomSize'
AND Reservations.R_Number IS NULL
It works by joining the rooms to the reservations for that room, and then selecting the rooms for which there are no reservations that conflicts with the new reservation being made.(Old reservation that ends before the new one starts, or that starts after the new one ends are no problem).
What you are doing here is a cross join. Every row from table a (Rooms) is joined with every row in table b (Reservations).
In order to make your query work, you need to specify that Rooms.Rooms_Key = Reservations.Rooms_ForignKey in your where clause (or an explicit join [inner,left,right] and specify the ON fields as they are easier to read in my opinion - explicit-vs-implicit for more info).
Once you have converted the join type, the where clause will start to give you better results, and you should be able to modify it if you still need to at that point.
I have a table with the following fields (for example);
id, reference, customerId.
Now, I often want to log an enquiry for a customer.. BUT, in some cases, I need to filter the enquiry based on the customers country... which is in the customer table..
id, Name, Country..for example
At the moment, my application shows 15 enquiries per page and I am SELECTing all enquiries, and for each one, checking the country field in customerTable based on the customerId to filter the country. I would also count the number of enquiries this way to find out the total number of enquiries and be able to display the page (Page 1 of 4).
As the database is growing, I am starting to notice a bit of lag, and I think my methodology is a bit flawed!
My first guess at how this should be done, is I can add the country to the enquiryTable. Problem solved, but does anyone else have a suggestion as to how this might be done? Because I don't like the idea of having to update each enquiry every time the country of a contact is changed.
Thanks in advance!
It looks to me like this data should be spread over 3 tables
customers
enquiries
countries
Then by using joins you can bring out the customer and country data and filter by either. Something like.....
SELECT
enquiries.enquiryid,
enquiries.enquiredetails,
customers.customerid,
customers.reference,
customers.countryid,
countries.name AS countryname
FROM
enquiries
INNER JOIN customers ON enquiries.customerid = customers.customerid
INNER JOIN countries ON customers.countryid = countries.countryid
WHERE countries.name='United Kingdom'
You should definitely be only touching the database once to do this.
Depending on how you are accessing your data you may be able to get a row count without issuing a second COUNT(*) query. You havent mentioned what programming language or data access strategy you have so difficult to be more helpful with the count. If you have no easy way of determining row count from within the data access layer of your code then you could use a stored procedure with an output parameter to give you the row count without making two round trips to the database. It all depends on your architecture, data access strategy and how close you are to your database.