querying

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 1 year ago . Improve this question I dont know is this is possible at all, I´m not even sure how to google it. Im using SQL Server 2014. Right now I have a SP that outputs a table with data including MovementID, Vehicle, VehicleType and Total of sales. But it groups all the vehicles ids and vehicles types with a

问题 Can anyone advise on how to query the `total_likes of a post to be shown in my HTML, I tried, but was given this error: Page not found (404) No BlogPost matches the given query. THANK YOU! I think it might be the way I am querying and linking the blog post with the likes but I'm not sure why I'm wrong and I don't know how to modify it despite trying for a few hours. views.py def home_feed_view(request, **kwargs): context = {} blog_posts = sorted(BlogPost.objects.all(), key= attrgetter('date

来源： https://stackoverflow.com/questions/63794162/querying-eventstoredb-with-java-api-or-http-api

来源： https://stackoverflow.com/questions/63794162/querying-eventstoredb-with-java-api-or-http-api

来源： https://stackoverflow.com/questions/63794162/querying-eventstoredb-with-java-api-or-http-api

问题 I am using the Android SDK of parse.com and have arrived at a peculiar problem. From a fragment's onCreate: Fetch an object from the server. Pin it. Fetch an object from the local datastore. Here is a snippet of the code from the onCreate: ParseObject myChatGroup = ParseObject.createWithoutData("ChatGroup", "mOJGWRiLPC"); myChatGroup.fetchInBackground(new GetCallback<ParseObject>() { @Override public void done(ParseObject chatGroup1, ParseException e) { if (e == null) { l.d("Fetched chat

问题 I am using EF 4.0 POCO in my application. Are there any downsides to retrieving information like this? Given a customerId and a productId , I would like to apply some business rules that require me to fetch lots teeny pieces of information from the database requiring multiple queries. Instead, I could write one query like so: var customerId = 1; var productId = 1; var aggregateQuery = from entry in Customers.Take(0).DefaultIfEmpty() select new { numberOfOrders = SalesOrderHeaders.Where

问题 I've had already implemented a function to search for users using the FirebaseDatabase like that: REF_USERS.queryOrdered(byChild: "username_lowercase").queryEnding(atValue: text+"\u{f8ff}").queryLimited(toFirst: 25).queryStarting(atValue: text).observeSingleEvent(of: .value, with: { (snapshot) in snapshot.children.forEach( { (s) in let child = s as! DataSnapshot if let dict = child.value as? [String: Any] { let user = UserInfo.createUser(dict: dict, key: child.key) if user.id! !=

问题 I have a collection with entries that look like : { "userid": 1, "contents": [ { "tag": "whatever", "value": 100 }, {"tag": "whatever2", "value": 110 } ] } I'd like to be able to query on that collection and returning only one part of the array : the one matching the query. I'm trying to use the $ positional operator to do so but it hasn't worked so far. Here is more precisely what I'd like to do : collection.find({'contents.tag':"whatever"},{'contents.$.value':1}) As a result I expect sth

问题 I have a docuemnt like this: public class Order { public string ClientName { get; set; } public List<OrderItem> Items { get; set; } } public class OrderItem { public string ProductCode { get; set; } public int Quantity { get; set; } } And I need to query collection of theese documents like this: var q = session.Query<Order_Index.Result, Order_Index>() .Where(o => o.ClientName.StartsWith("Jho") && o.Items.Any(i => i.ProductCode == "Book" && i.Quantity >= 10)) .OfType<Order>(); Every example of