sqlite

问题 I am writing a Scheduling application, and each row in my Database Table is a different task to run at a certain time. In my application, I pull this information, and store each task in a separate object, and keep them stored in a List. As of right now, when I run my function to refresh this, there are no checks and it just adds them all again. I need to figure out the best way to see if an object already exists for the particular job, and only create a new Object for it if it doesn't. Would

问题 This question already has answers here : How can I get dict from sqlite query? (14 answers) <sqlite3.Row object at 0x1017fe3f0> instead of database contents (1 answer) Python Class SQLite3 request returns object (2 answers) Closed 4 months ago . import sqlite3 class DBConnect(): def __init__(self): self.db=sqlite3.connect("Registrations.db") self.db.row_factory=sqlite3.Row self.db.execute("create table if not exists Ticket(ID integer Primary key autoincrement,name text,gender text,comment

问题 Okay i tried everyting i could, i saw all the posts here about this error and none of them solved my problem: Here is my simple update statement, i would like to increment each itemSlotIndex by 1 at a certain characterName String myQuery = "UPDATE " + theTable.getTableName() + " SET " + theTable.getItemSlotIndex() + " = " + theTable.getItemSlotIndex() + " + 1 WHERE " + theTable.getCharName() + " = "+character.getName(); Log.i("myQuery", myQuery); theDatabase.execSQL(myQuery); If this mumbo

问题 I am practicing with dataBaseRoom, for them I have created a button, which allow me to read database , i want to put the name of a user and when pressing the button (read data base) reflects me, his name, last name and age in the texview,the problem is that I do not know how to display the data in a textView. Activity where I want to carry out the actions //Entity @Entity(tableName = "user_table") data class User( @PrimaryKey(autoGenerate = true)@ColumnInfo(name = "id") val id: Int, val

问题 What's the easiest way to backup/restore sqlite memory database to file database in Qt . 回答1: I think you will need to work with SQLite directly to do this. SQLite has an Online Backup API, the first example is backing up an in-memory database to a file database, so it should be possible to do what you need to do. To get a sqlite3* database handle, get the driver (QSqlDatabase::driver) from the database then get the handle (QSqlDriver::handle). The example code in the Qt docs shows how to

问题 I am using following code public boolean addArea(AreaClass area , ArrayList<AreaMarkClass> areaArray) { area.id = getNextAreaId(); Log.d("longitude", area.longitude); Log.d("latitude", area.latitude); ContentValues initialValues = new ContentValues(); initialValues.put("_id", area.id); initialValues.put("name", area.name); initialValues.put("longitude", area.longitude); initialValues.put("latitude", area.latitude); initialValues.put("zoomLevel", area.zoomLevel); initialValues.put(

问题 I'd like my discord bot to send a user (captain) a message, when another user on the server wants to join their team. I have the DiscordID of the captain stored in my SQLite database and can retrieve it. The problem is that when I pass this variable as an argument to the client.users.get() method, it returns undefined. I've tried converting the DiscordID to a string, but it still returns undefined. When I hardcode the DiscordID it works fine. I'm not very experienced with discord.js so I'm

问题 Long story short, in SQLite, I have a sortOrder field that takes care of, well, a changeable sort order of items in a table. I have triggers that: After Inesrt: the trigger updates all of the sortOrder fields by +1 if they are > than the field for the one inserted. After Delete: the trigger updates all of the sortOrder fields by -1 if they are > than the field for the one deleted. On Update (sortOrder). This adds or subtracts from the sortOrder field depending upon whether the number was

问题 I'm trying to create relationships with my tables in SQLite (I'm currently working with Xamarin.Forms), but I'm not getting the expected result, adding the Data Annotations [ForeignKey(typeof(UserLocal))] But I'm not creating the relationship in my BD, what's going on? my BD is only doing the indexed relationships, but it is not relating them to foreign keys Browser SQLite For the connection to my database, I created an interface which gets the route in Android and iOS, and then to manage my

问题 I have a worker running python script every 2 hour on Heroku. The problem is each time I 'pull' the changes from git. There is no changes at all for the sqlite3 database. But I am sure the program is running and the database has changed by looking at the log file. heroku log How to retrieve the .db file then ? 回答1: It sounds like you have a little misconception. Heroku's git support is effectively one-way; you can use it to push new code to be run on the server, but you can't use it to copy