sqlite

问题 My templates is this: {% for order in orders %} <li><h2>{{ order}}</h2> {% endfor %} and my routing function is this: @app.route('/order_history') def orderhistory(): db = get_db() cur = db.execute('select * from order_items') orders = cur.fetchall() return render_template('order_history.html', orders = orders) Any idea why I am getting row object locations instead of the db contents? 回答1: You need to get the data from the rows: {% for order in orders %} <li><h2>{{ order[0] }}</h2></li> {%

问题 I have 2 tables. items and itemItems itemItems describes a many to many relationship between items . I.e. a member of items could have many children and they could have many children which in turn could have many children etc.. item: itemID | more stuff ...... 1 ... 2 ... 3 ... 4 ... itemItems: parentItemID | childItemID 1 2 1 3 2 4 I want to write a query that would recursively get all of the children under one root node. I believe this is possible with something called a recursive join but

问题 I want to save image using my developed app into mobile what is the best way to it. I was trying to save via sqlite but is there any other options? 回答1: The recommended way is to store the image as a file not in the database and then store the path or enough of the path to uniquely identify the image in the database. To store an image you have to store it as a BLOB based upon a byte[] (byte array); However, using the Android SDK, there is a limitation that only images less than 2MB can be

问题 I am creating a Android app that stores data like name, number to SQLite database. I need to push the data from SQLite to Firebase. This is the SQLite code for the app which stores the data in detailsdb sqLiteHelper = new SQLiteHelper(this, "DetailsDB.sqlite", null, 1); sqLiteHelper.queryData("CREATE TABLE IF NOT EXISTS DETAILS(Id INTEGER PRIMARY KEY AUTOINCREMENT, name VARCHAR, phone VARCHAR, location VARCHAR)"); onClick save try { sqLiteHelper.insertData( eName.getText().toString().trim(),

问题 I want to save image using my developed app into mobile what is the best way to it. I was trying to save via sqlite but is there any other options? 回答1: The recommended way is to store the image as a file not in the database and then store the path or enough of the path to uniquely identify the image in the database. To store an image you have to store it as a BLOB based upon a byte[] (byte array); However, using the Android SDK, there is a limitation that only images less than 2MB can be

问题 I want to save image using my developed app into mobile what is the best way to it. I was trying to save via sqlite but is there any other options? 回答1: The recommended way is to store the image as a file not in the database and then store the path or enough of the path to uniquely identify the image in the database. To store an image you have to store it as a BLOB based upon a byte[] (byte array); However, using the Android SDK, there is a limitation that only images less than 2MB can be

问题 I have an encrypted database using "SQLite Cipher" . When I try to connect to the database using Connection string the following error message appears: 'SQL logic error Cannot use "Password" connection string property: library was not built with encryption support.' Imports System.Data.SQLite Public Class frm_projects Dim dtset As New SQLiteConnection("Data Source=Setting.db;Password=m;") Private Sub frm_projects_Load(sender As Object, e As EventArgs) Handles MyBase.Load Try If dtset.State =

问题 I have an encrypted database using "SQLite Cipher" . When I try to connect to the database using Connection string the following error message appears: 'SQL logic error Cannot use "Password" connection string property: library was not built with encryption support.' Imports System.Data.SQLite Public Class frm_projects Dim dtset As New SQLiteConnection("Data Source=Setting.db;Password=m;") Private Sub frm_projects_Load(sender As Object, e As EventArgs) Handles MyBase.Load Try If dtset.State =

问题 I am building a website where people can apply for the team, it's been going well so far however when I display the applications on a page, this shows up. (' IGN:\r\n Age:\r\n Server Proxy:\r\n Nationality:\r\n TeamSpeak?:\r\n Discord?:\r\n Twitter?:\r\n YouTube?:\r\n Requirement Option:\r\n Exceptions:\r\n Current Clans?:\r\n Why Ominous?:\r\n\t\t\t\t\t\t',) The textarea looks like this, </header> <h1>Enter Application</h1> <form action="/memberapp" method="POST"> <textarea type="text" name=

问题 I'm trying to update some rows in a table based on two other columns in another table. As a toy model, consider two tables: People, with columns first_name, last_name, and has_license; Drivers, with columns first_name and last_name. Now I want to update the first table so has_license='Y' for all tuples of first_name and last_name that are also in the Drivers table. I could do: UPDATE people SET has_license='Y' WHERE first_name + last_name IN (SELECT first_name + last_name FROM drivers) (In my