sqlite

问题 I have created SQLite database and have copied it in the root of the project like that: The database is called MobileSell.db It appears in Visual Studio like that: My question is how can I reference it so afterwards I can say connection.InsertIntoTableArticles(value)(this is pseudo code) 回答1: You can refer to this. There only three steps to achieve it: 1) Create Assets folder which is parallel with Resources folder in your project, put your .db file into it. 2) Copy the .db file to SDCard

问题 I already saw this question in here. The last one to try was the below one. pip install pysqlite But it shows UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe4 in position 98: invalid continuation byte Pls help me. Am using python 3.4 回答1: I was facing the same issue. In linux I had to install sqlite-dev package first and then installed python, then it worked fine. Just try installing sqlite-dev package and import the module. if this doesn't work you might have to install pysqlite

问题 i am using python 2.7.11 on virtualenv in lubuntu 12.04.(dont own a good laptop its dell latitude d600) Python 2.7.11 (default, Mar 4 2016, 04:38:41) [GCC 4.6.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. import sqlite3 Traceback (most recent call last): File "", line 1, in File "/home/maharshi/.localpython/lib/python2.7/sqlite3/ init .py", line 24, in from dbapi2 import * File "/home/maharshi/.localpython/lib/python2.7/sqlite3/dbapi2.py", line 28, in

问题 After I reached the limits of Ionic I boldly decided to detach from the web world and learn Kotlin to rewrite the app in the native language. After an amusing challenge I have my new app up and running. But I forgot about one of the most important details : Data Migration . The Ionic version stores data localy in an SQLite database: I am using this Ionic Native Plugin Cordova-sqlite-storage and I nearly do the same thing as this guy over here the only major diffrence I am on Capacitor. In the

问题 I want to move data from SQL Server to sqlite. What I do is first move the data from SQL Server to a dataset , and then move from there to the sqlite table. The following is the code that does that. I believe there may be more efficient way try { using (SqlConnection sqlConnection = new SqlConnection(DataSources.RemoteConnectionString())) { sqlConnection.Open(); using (SqlCommand sqlCommand = new SqlCommand("[DB7934_businessmind].[DownloadAreaOfLaw]", sqlConnection)) { sqlCommand.CommandType

问题 I have the following queries in sqlite which I am using in Xamarin Forms. allProdsId is initialized as: allProdsId = new List<Products>(); First of all, I made a query which retrieves all products ID from the table products. Then I want to delete all orders where orders have ProdId all the allProdsId retrieved. The delete query is not working. Can someone please help me to achieve the WHERE IN clause in sqlite using xamarin forms ? allProdsId = _con.Query<Products>("Select ProdId from

问题 I am trying to create automatically a rather large sqlite database tables which all have at least 50 columns. The column names are already available in different lists. Using the .format I almost did this. The only open issue is the predetermination of the number of placeholders for "{}" from the length of name's list. Please see the code example below. import sqlite3 db_path = "//Some path/" sqlite_file = 'index_db.sqlite' conn = sqlite3.connect(db_path + sqlite_file) c = conn.cursor() db

问题 I have two relational dataframes like the bellow. df_doc: |document_id| name| +-----------+-----+ | 1| aaa| | 2| bbb| df_topic: | topic_id| name|document_id| +-----------+-----+-----------+ | 1| xxx| 1| | 2| yyy| 2| | 3| zzz| 2| I want merge them to a single nested json file like the bellow. [ { "document_id": 1, "name": "aaa", "topics": [ { "topic_id": 1, "name": "xxx" } ] }, { "document_id": 2, "name": "bbb", "topics": [ { "topic_id": 2, "name": "yyy" }, { "topic_id": 3, "name": "zzz" } ] }

问题 I have a database where I want to make a class called Employee, giving only the empid and getting the rest from a database. def__init__(self, empid): conn = sqlite3.connect("employee.db") cur = conn.cursor() self.empid = empid self.name = cur.execute("SELECT name FROM employees WHERE empid = " + str(empid)) self.bday = cur.execute("SELECT bday FROM employees WHERE empid = " + str(empid)) Only it does not return the values, rather an object when I print it. <sqlite3.Cursor object at

问题 I am new in Python. I am trying to compare two sqlite databases having the same schema. The table structure is also same in both db but the data is different. I want to pickup the rows from both tables from both databases which are not present in either db1.fdetail or db2.fdetail DB1 - Table - fdetail id name key 1 A k1 2 B K2 3 C K3 DB2 - Table - fdetail id name keyid 1 A k1 2 D K4 3 E K5 4 F K6 Expected Output id name keyid 1 B k2 2 C K3 3 D K4 4 E K5 5 F K6 My code is import sqlite3 db1 =