I'm developing an application based on the facebook checkins.
I'm searching a way to group the results, that I receive asking for an user's checkins, by the page_id with a single FQL query.
Generally I would try with the GROUP clause of the SQL language but i read that this clause isn't supported by FQL.
Thanks in advance,
Luca
Since there is no GROUP BY available, as you said, this is not possible via a single FQL query.
Your options are to either do that yourself while processing the data you received by looping over it and transfering it into the desired data structure, or if you know what pages are involved beforehand, by doing a multi query including one single query for every page_id.
Related
I would like to know if there's an option to query with multiple partition keys from DynamoDB table in AWS dashboard. Unable to find any article or similar requests for dashboard on the web. Will keep you posted if I find an answer for the same.
Thanks in advance.
The Console doesn't support this directly, because there is no support in the underlying API. What you're looking for is the equivalent of the following SQL query:
select *
from table
where PK in ('value_1', 'value_2') /*equivalent to: PK = 'value_1' or PK = 'value_2' */
The console supports using the Query and Scan operations. Query always operates on an item collection, so all items that share the same partition key, which means it can't be used for your use case.
Scan on the other hand is a full table scan, which allows you to optionally filter the results. The filter language has no support for this kind of or logical operator so that won't really help you. It will however allow you to view all items, which includes the ones you're looking for, but as I said, it's not really possible.
I'm currently trying to build a web app that would allow many users to query an external API (I cannot retrieve all the data served by this API at regular intervals to populate my PostgreSQL database for various reasons). I've read several thing about ACID and MVCC but still, I'm not sure there won't be any problem if several users are populating/reading my PostgreSQL database at the very same time. So here I'm asking for advice (I'm very new to this field)!
Let's say my users query the external API to retrieve articles. They make their search via a form, the back end gets it, queries the api, populates the database, then query the database to return some data to the front end.
Would it be okay to simply create a unique table to store the articles returned by the API when users are querying it ?
Shall I rather store the articles returned by the API and associate each of them to the user that requested it (the Article model will contain a foreign key mapping to a User model)?
Or shall I give each user a table (data isolation would be good but that sounds very inefficient)?
Thanks for your help !
Would it be okay to simply create a unique table to store the articles returned by the API when users are querying it ?
Yes. If the articles have unique keys (doi?) you could use INSERT...ON CONFLICT DO NOTHING to handle the (presumably very rare) case that an article is requested by two people nearly simultaneously.
Shall I rather store the articles returned by the API and associate each of them to the user that requested it (the Article model will contain a foreign key mapping to a User model)?
Do you want to? Is there a reason to? Do you care who requested each article? It sounds like you anticipating storing only the first person to request each article, and not every request?
Or shall I give each user a table (data isolation would be good but that sounds very inefficient)?
Right, you would be hitting the API a lot more often (assuming some large fraction of articles are requested more than once) and storing a lot of duplicates. It might not even solve the problem, if one person hits "submit" twice in a row, or has multiple tabs open, or writes a bot to hit your service in parallel.
I'm retreiving event data using Real Time Google Analytics API, so as to trigger responses each time conditions are met - while the user navigates.
This is my actual query on Google Analytics Real Time API (which works perfectly!)
return service.data().realtime().get(
ids='ga:' + profile_id,
metrics='rt:totalEvents',
dimensions='rt:eventAction,rt:eventLabel,rt:eventCategory',
max_results='25').execute()
I'd like to show results grouped by each particular session or user. So as to trigger a message to this particular user if some conditions are met.
Is that possible? And if so, how do apply this criteria to this query?
"Trigger a message to a particular user" would imply that you either have personally identifiable data stored in GA, which would violate Googles TOS, or that you map an anonymous ID (clientid or UserID or similar) to a key stored in an external database (which might be legally murky, depending on your legislation). Since I don't want to throw away the answer I have written before reading your question to the end :-) I am going to assume the latter.
So, is that possible? No, not really. By default GA does not identify neither an identifier for the user (client id or user id) nor for the session (a session identifier is present only in the BigQuery export schema).
The realtime API has a very limited set of dimensions (mostly I think because data aggregation does not happen in realtime), so you can't even use custom dimensions. Your only chance would be to overwrite one of the standard fields, i.e. campaign information.
Of course this destroys the original data in the field. So you should use an extra view for the API query, send a custom dimension with the user identifier along, and then use an advanced filter to copy the custom dimension value to a standard field (while you original data is safe in your other data views). This is a bit hackish, though.
Also the realtime API only displays the current hit per user, so you cannot group by user in the query in any case - you'd need to download and store the data to an external database and do your aggregation there.
We have a company program designed to help us get control over data. It has feature to group all the application of one Client. If I want to take a look at them I click on the Client and I see a list of all applications made for him. Take a look at the picture below:
I was wondering if Microsoft Access can do the same? If yes where should I start looking?
I did some internet search and no solution found.
That is built in, and it is called Subdatasheet. You have relationships properly set between Clients and Order, for instance, when you open the Clients table you will see such small "+" allowing to view the Orders of the current client. You may have to set the Subdatasheet Name property of table Clients to "Orders" in this case.
If you want to work with forms, you can build a continuous from for Clients, then one for Orders, then insert the Orders subform in the Footer of the Clients form. Access might tell you you can't do this, just ignore, it works.
In Access that would simply be a continuous form with a filter. Typically opened from a list of clients, setting a filter for the applications of the selected client.
Unless I'm misunderstanding the question.
Can anyone tell me if its possible to search public facebook streams for specific URLs? And if yes, what is the FQL and do I need to set access token?
Update: What about using graph api.... or even searching the link table? I tried using the graph api to search the stream table, but its not bring back great results.
You can search nearly anything in FQL using the undocumented CONTAINS() function:
SELECT actor_id, created_time, message, attachment FROM stream WHERE CONTAINS('stackoverflow.com`)
You need to be careful using it, because the results will be filtered after the query runs to only show items that are visible to the current session user. You may get empty data sets returned even though there are lots of items that meet your criteria. AFAIK, there is no visible_to_me field where you can filter the posts prior to the FB visibility filter.
You always need an access token to use the stream table.