database

问题 Can you help my? I have created and published the app on Google play store that contains a database, I have tested it on different android phones. My app works perfect on android version (Android 10,8,5 etc...) except on Android 9, do you know how can I fix that problem? I find that problem on Huawei Smart Z, Honor P20, Samsung Y6,Xiaomi Mi. Play store console says that my app can run on that models. I am beginner in app development. This happening on mine Huawei Smart: when I install the app

问题 We have a web app which requires to send lots of notifications to users (over 1,000,000 notifications per day). We use Laravel and MySQL for the database. I loop through a group of users send notifications and save it to the database. Let's say if I want to send a group of 1000 users. The data will be written to the DB 1000 time. As I said, we have over 1,000,000 notifications per day, which take so many resources. What's the appropriate way to approach this problem? I should change to a new

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . Improve this question I am analyzing MS Access 2010 database files that were created by a person who has left the organization. All of the tables in one file, call it "Beta.accdb", are links to tables in another database file (call that one "Alpha.accdb"). I have verified that when I

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . Improve this question Looking for a recommendation. I have a command line utility that now needs to process a large amount of data coming from a web service in a form of a CSV. I need to run multiple tests on the data to look for anomalies and patterns. I'd like the utility to be

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . Improve this question Looking for a recommendation. I have a command line utility that now needs to process a large amount of data coming from a web service in a form of a CSV. I need to run multiple tests on the data to look for anomalies and patterns. I'd like the utility to be

问题 I'll preface this with: I have very little database experience. I understand the concept of a database and how to use a database within Java, but I have no idea how to create one and my knowledge of SQL is essentially zilch. I am creating a sample project to show off the features of IntelliJ to my company, in the hopes they will convert from Eclipse. One of the big features for our company will be database integration, so I would like to show off the Database tools. To do this, I need a

问题 I'm working on a project where I have to do a custom "tour/trip" based on the locations the user chooses on the map. and every tour has a title, with the locations that he chose. say for example he made a tour(list) and called it 'Tour 1' and in this 'Tour 1' first he wants to go to the hotel, and then to KFC, and then to the beach. I'm at the point where I made a list and gave it a title, but can't show the places that I planned to go in the activity, here is a screenshot of the activity

问题 I'm working on a project where I have to do a custom "tour/trip" based on the locations the user chooses on the map. and every tour has a title, with the locations that he chose. say for example he made a tour(list) and called it 'Tour 1' and in this 'Tour 1' first he wants to go to the hotel, and then to KFC, and then to the beach. I'm at the point where I made a list and gave it a title, but can't show the places that I planned to go in the activity, here is a screenshot of the activity

问题 In my database, I have 3 columns: Date(PrimaryKey, TEXT) , FlightNumber(PrimaryKey, INTEGER) , and LoadEstimate(INTEGER) . What I would like to do is put all the values from database into a hashmap. I have to make sure that all the datatypes are correct in order to load them into it and would like to filter the LoadEstimate data by user input (a date and the flight number) and then return the predicted number for LoadEstimate and if none return -1 . Here is my database: 回答1: Text Combine your

问题 I'm trying to import data from SQL Server to R. I was given the server name, user name and password to the SQL Server database. I've installed RODBC in R. But I don't know how to write the odbcConnect search as I don't have the database on my computer and I only know the server name. What should I do in such a situation? Thanks! 回答1: This is a typical SQL Server connection using DBI + odbc packages : library(DBI) conn <- DBI::dbConnect( odbc::odbc(), Driver = "SQL Server", Server =