sqlite

问题 I have been developing an app in Qt on Ubuntu which works with an SQLite database and several GB of files. Everything is working well in Ubuntu and Windows, but... when I try to port to Android I'm having some problems. I've placed the database.db file and other files on an SD card, installed it in my target device, and finally was able to "find" it with this code: QString dbName; #ifdef Q_OS_ANDROID QAndroidJniObject androidContext = QtAndroid::androidContext(); QAndroidJniObject dir =

问题 I have the codes below that let users on my website to search for blogs. With the current, my HTML page will only show a list of data from all the row that has columns that match with the search input. But, I want to get the blog_id of all the matching rows that I just query with c.fetchall(). How would I do it? Should I write some codes right after I query data?... I would greatly appreciate if you help me. Also, if possible, could you show me how can I set the codes below to only query

问题 please help! I am using sqlite3 in ipython notebook to create an SQL database. I think I have successfully created the database, but when I go to look at it I am receiving an encoding UTF8 error. Here is my code: import sqlite3 conn=sqlite3.connect('example.db') c=conn.cursor() c.execute('''DROP TABLE PROFILE''') c.execute('''CREATE TABLE PROFILE ( FIRSTNAME TEXT PRIMARY KEY unique NOT NULL, LASTNAME TEXT NOT NULL, EMAILADDRESS TEXT NOT NULL, PASSWORD TEXT NOT NULL, CURRENTJOBTITLE TEXT NOT

问题 I have really been searching around for a while now but cannot find and understand how this do work. I am going to create an app in Xamarin forms and starting with SQLite. I need to have unique list items for each Main item in the app. For example, I am having a list with items. When I am selecting an item in the list a new page will pop up and display the items of that item. So from my point of view I am in need of two SQLite tables with relations between. This is the Main table with all

问题 I've the following query: SELECT tn.Date, b1.Name DrBook, b2.Name CrBook, c1.Name DrControl, c2.Name CrControl, l1.Name DrLedger, l2.Name CrLedger, s1.Name DrSubLedger, s2.Name CrSubLedger, p1.Name DrParty, p2.Name CrParty, m1.Name DrMember, m2.Name CrMember, tn.Amount, tn.Narration FROM Transactions tn LEFT JOIN Books b1 ON b1.Id = tn.DrBook LEFT JOIN Books b2 ON b2.Id = tn.CrBook LEFT JOIN ControlLedgers c1 ON c1.Id = tn.DrControl LEFT JOIN ControlLedgers c2 ON c2.Id = tn.CrControl LEFT

问题 Import xls file (more than 5000 lines) into my sqlite database takes so long. def importeradsl(request): if "GET" == request.method: else: excel_file = request.FILES["excel_file"] #you may put validations here to check extension or file size wb = openpyxl.load_workbook(excel_file) #getting a particular sheet by name out of many sheets worksheet = wb["Sheet 1"] #iterating over the rows and getting value from each cell in row for row in worksheet.iter_rows(min_row=2): row_data = list() for cell

问题 I have 2 models Puzzle and Play. for each play I have a rating. I would like to annotate to a Puzzle queryset the median rating value for all corresponding plays. class Puzzle(models.Model): name = models.CharField(max_length=255) class Play(models.Model): puzzle = models.ForeignKey(Puzzle, on_delete=models.CASCADE,related_name='plays') rating = models.IntegerField(default=-1) puzzle_completed = models.BooleanField(default=None, blank=False, null=False) I know how to count: Puzzle.objects

问题 I am trying to make an "unread" function for my messenger. When I refresh try to refresh the database it shows There is no column with name 'read' on table 'messages'. This error and my "unread" feature is not working. I am using SQlite. Here's my Unread migration:- public function up() { Schema::table('messages', function (Blueprint $table) { $table->boolean('read')->after('to')->default(false); }); } public function down() { Schema::table('messages', function (Blueprint $table) { $table-

问题 Hi i got an error while connection to my sqlitedb. I create my sqlitedb using Firefox Sqlite Addon. MyConn : (webconfig) <connectionStrings> <add name="TARKMANCAS_CONNECTION" connectionString="Data Source=C:/TARKMANCAS_DB.sqlite;"/> </connectionStrings> MyClass: public TarkBaseDb() : base("TARKMANCAS_CONNECTION") { } // start // public Table<TarkBaseSchema.KadroGrubuCls> KadroGrubu { get { return GetTable<TarkBaseSchema.KadroGrubuCls>(); } } TarkBaseSchema: [TableName("EGITIM_KADROSU_GRUBU

问题 Last year, I developed a simple Angular-Express-SQLite based application for a local Warehouse(Logistics Hub) which was used to keep track of daily incoming and outgoing trucks with information like their weight, origin, etc. and I deployed the app on an offline desktop. Everything went well until I came to know that the computer operator of the Warehouse resold the app to other Warehouses for a decent amount. Now, the first Warehouse owner has contacted me again with some changes in the app