I've got two tables 1. List of continents 2. Contries belonging to each of 6 continents. In my app I want to show up in table view continent name and countries belonging to this continent. My current select:
SELECT cont.continentID,cont.continentName,cont.continentImage,(select contr.countryName from countries as contr where contr.relativeToContinent=cont.continentID) as 'hash'\
FROM Continents as cont
I frankly to say, was expecting to see the full list of countries because select contr.countryName from countries as contr where contr.relativeToContinent=cont.continentID select, yes, retrieves the full list, but when all the selects are combined together I am getting only first country from list. How to solve this problem? Thank you in advance.
give us a database example (just export all the database with sqlite3 db.sqlite .dump) then we can try it out ourselves. i think it could be done with join or something.
Related
I am writing a query for a SQLite database in which I need to find the best selling product for each region in a list of 6 regions. However, some of the regions don't have any product sold in which case I am supposed to output 'No Product Sold'. I am trying to use an ifnull() statement, but can't get it working.
Currently, my query is as follows
SELECT area.name AS region,
CASE ifnull(sales.area_id, 'No Product Sold')
END AS most_sales
FROM product
JOIN sales ON product.rank = sales.rank
GROUP BY area name
I also know I will likely need to use a nested query, but I'm not sure how yet.
Unfortunately I cannot base this off of rank, it has to be the item with the highest sales in the region. Does anyone know what I am doing wrong?
I have an issue related to the data filtering. I have a Google Drive table to store data, and I want to show one field of this data source in a dropdown to make a filter by this field (Country).
The problem is that this dropdown filter it's only showing the countries that appears on the current page of the list. For example, if in the first page appears one country (Thailand) on the dropdown I'll only see Thailand.
If we move to the second page of the list we have another two countries (Spain and Portugal) and then the dropdown will only show Spain and Portugal.
What I really want is a dropdown which shows all the countries, no matter if they aren't on the current page, but I don't know how to fix it.
This the the configuration of the Country Selector:
In the help, it's said we should use #datasource.model.fields.COUNTRY.possibleValues,
but if I use this paramater as Options, nothing is displayed in the selector.
I have spend a lot of hours trying to fix this issue and I don't find the solution, and I would like to check with you if it's an issue or I'm doing something wrong...
Could you help me?
You are using the same datasource for your dropdown and table and by #distinct()#sort() you are filtering items that are already loaded to browser (opposed to the whole dataset stored in database).
You need to have a separate datasource for your dropdown. There are at least three techniques to do this:
Possible values
You can predefine allowed values for your Country field and use them to populate drop down options both in create form and table filtering #datasource.model.fields.Country.possibleValues as you mentioned in question:
Create model for countries
By introducing dedicated related model for countries you can get the following benefits:
normalized data (you will not store the same country multiple times)
you'll be able to keep your countries list clean (with current approach there is possibility to have the same country with different spellings like 'US', 'USA', 'United State', etc)
app users when they create new records will be able to choose the country they need from dropdown (opposed to error prone typing it every time for all new records).
your dropdown bindings will be as simple as these:
// for names
#datasources.Countries.items..Names
// for options
#datasources.Countries.items.._key
// for value
#datasource.query.filters.Country._key._equals
Create Calculated Model
With Calculated Model you'll be able to squeeze unique country values from your table. You server query script can look similar to this:
function getUniqueCountries_() {
var consumptions = app.models.Consumption.newQuery().run();
var countries = [];
consumptions.reduce(function (allCountries, consumption) {
if (!allCountries[consumption.Country]) {
var country = app.models.CountryCalc.newRecord();
country.Name = consumption.Country;
countries.push(country);
allCountries[consumption.Country] = true;
}
}, {});
return countries;
}
However with growth of your Consumption table it can give you significant performance overhead. In this case I would rather look into direction of Cloud SQL and Calculated SQL model.
Note:
I gave a pretty broad answer that also covers similar situations when number of field options can be unlimited (opposed to limited countries number).
I am struggling in the creation of a report including four tables.
Those tables should be the same for each account. I use just one dataset. When I run the report, the data is good, but tables listing appears wrong.
First all BALANCE DETAIL tables for all accounts selected are listed, then all DEBIT TRANSACTION tables for all accounts selected are listed etc.
For each account the page should show up just like this
Please give me an easy-to-understand answer since I am really a beginner in this sector.
It might be easier to this with 5 separate datasets, but I think you can do it with just on also.
Create on 'main' table on the dataset. use 4 detail rows, 1 column
Group it on accountnumber
In each detail of the main table, insert a new table with the same dataset.
Group those sub-tables also on accountnumber
Add a filter to the subtables. set the subtable accountnumber equal to the outer table account number (you can use the expression builder, but it should read something like this: row['ponum'] equals row._outer["ponum"] )
Good luck!
I have a report that is based on a query of diagnoses (for example diabetes). The report returns a list of patients with that diagnosis. The problem is if john Q has diabetes xyz and diabetes 123, so if I run the report to give me a list of everyone with diabetes it will retun his name twice. I really don't want to change the particular query that this based on, I just want distinct name in the report. Is there a way to use distinct for a report or any other way of limiting the names to just once in the report? Or am I going to have to write a distinct query just for this report?
either edit the query by changing SELECT to
SELECT DISTINCT
or set the report to use grouping, you can Group by Name (or more likely, by a patient ID so two people with the same name don't get combined) - it's as described here
if you exclude listing the types of diabetes you will get each person on one line, if you include the types of diabetes you will get each person's details used as a heading with the types of diabetes indented
If the report already exists you can edit it by using the Grouping and Sorting option https://support.office.com/en-za/article/Create-a-grouped-or-summary-report-6a58e9ab-9f74-4689-83b6-c63cddb2c7f9?ui=en-US&rs=en-ZA&ad=ZA#__migbm_0
I know this has been asked before..sort of. And that's why I'm posting. Basically I'm building a report in Crystal that relies, to keep this simple, at least 3 tables.
Table A is inner joined to table B by a unique ID. Table B has a child table that may or may not have data related to this unqiue ID.
As a general example table A is a customer table, table B is a product table and the child table is contains the product number. All customers have a product, but not all customers have product number in the child table. I hope I've explained that simply enough.
My issue is sort of between Crytal and Access and how to query this. When I'm writing behind something in VB it's easy enough to write and execute a query and display the result in the desired manner. However I can't seem to get my query straight... I either end up with a report with cartesian product as the resultset, which displays ok...except that even with the few records I have ends up being about 30k pages..or I end up with a blank dataset because the child table does not have corrisponding data to B.
Using outter joins I've managed to get my results within some amount of reason but not acceptable to a real world report. I'm sure this issue has come up but I can't seem to find any suitable answers and to be honest I'm not even sure what questions to ask being a Crystal n00b.
What I'm really after is the data from Table A, the data from Table B and children tables. While they are logically linked and can be linked with the ID field, it isn't necessary I don't think because I am taking a parameter value for the report of the ID field. And once the tables are filtered, no other action needs to be taken except to dump them back on the report.
So can anybody point me in the right direction? Can I set up individual datasoruces (unrelated) based perhaps in a seperate section? Should I build a tree of queries and logic in my DB to get what I need out? I've been racking my brain and can't seem to find the right solution, any and all advice is apreciated and if I can clarify anything or answer any questions I will.
Thanks in advance.
As per requested below:
Section1
ID fname lname
01 john smith
Section2
ID notifiedDate notifiedTime
01 10/10/2012 12:35PM
S2childAdmin
ID noteName
01 jane doe
This data is logically related and can be related in the DB. However it is not necessary as long as the ID parameter is passed to each table. Querying Section1 inner joined with Section2 works fine. But any other arrangements result in more rows than required and I end up with a report many times duplicated. What I really need is something like Section1 joined with Section2 and S2childAdmin as a freely availble table. Otherwise it multiplies my data or results in a null recordset (because it can return 0 rows)
I think this should help point you in the right direction, though it has been 5 years or so since I did heavy Crystal Reports work.
One option might be to join everything using Outer Joins like you stated you were, then use a Crystal Report 'group' on the Table A ID, with a group based upon Table B ID inside of that. So you would, in the actual 'Detail' area put your table C details if there were any, and then use the Group header/footer for Table A and Table B to show data specific to those objects.
Another possible solution that may fall short of your requirements but might get you thinking in another way, is to create your main report and in it, display the fields from table A. Then below those fields include a sub-report and pass in the unique ID from Table A. You will then have a query inside of the subreport that finds all of the Table B records with that Table A.ID value and displays their details.
At this point you run into a weakness of Crystal Reports (at least as of the last version I used) in that you cannot have a subreport inside of a subreport.