Correctly Using Qmark (or Named) Style for SQL Queries Question: I’ve got a a database filled with lots of data. Let’s make it simple and say the schema looks like this: CREATE TABLE foo ( col1 CHAR(25) PRIMARY KEY, col2 CHAR(2) NOT NULL, col3 CHAR(1) NOT NULL CONSTRAINT c_col2 (col2 = ‘an’ OR col2 = …
How do I ensure any object I create is saved in my django project? Question: I’m working on a simple chat app that creates rooms for users to join. You enter your room name and it checks if the room exists already. If it does, you’re redirected to the room. If not, it creates a …
Dynamic SQL queries with SQLite3 Question: I would like to allow users to query a sql database. The database is here So the user will be able to enter the queries they want: csr_city= input("Enter a city >>").lower().strip().replace(‘ ‘,”) csr_type = input("Enter a type >>").lower().strip() and then the query will execute: cur = conn.cursor() cur.execute(‘SELECT …
Read lines from .txt file into sql query Question: I want to run a .txt file line for line through an SQL query. The .txt file consists of songtitles that may or may not exist in the database. If there is more than one option that fits the songtitle in the database a selection menu …
Copying a table from an in-memory database to a on-disk database in sqlite3 Question: I want to copy one specific table from an in-memory sqlite database, using Python (3.9). Looking in the documentation, I should be able to simply attach the in-memory database to the file database, however while attaching throws no error, when I …
Python Sqlite and Excel output with headers and Row ID Question: Please help to find correct solution from "simple to customize in future" point of view. I have SQLite table and very big select. After this select I got 5 column and any rows. I want to export this data to Special Excel file and …
how to send parameters with f-Strings in a sqllite query python Question: how can i send a parameter to a query this is my code import pandas as pd import sqlite3 def query_brand(filter): sql_query = pd.read_sql(f’SELECT * FROM ps_lss_brands WHERE label = {filter}’, self.conn_brand) df = pd.DataFrame(sql_query, columns = [‘id_brand’, ‘label’]) # print(df["id_brand"][0]) print(df) query_brand("ACURA") …
Create ranking within set of rows resulting from GROUP BY Question: I have the following table CREATE TABLE "results" ( "player" INTEGER, "tournament" INTEGER, "year" INTEGER, "course" INTEGER, "round" INTEGER, "score" INTEGER, ); With the following data sample for a single tournament / year / round-combination. 1 33 2016 895 1 20 2 33 2016 …
Iterator should return strings, not bytes (the file should be opened in text mode) Question: List item this is my code.. def import_excel(request): if request.method == ‘POST’: person_resource = PersonResource() dataset = Dataset() new_person = request.FILES[‘myfile’] if not new_person.name.endswith(‘csv’): messages.info(request,’Wrong format’) return render(request,’upload.html’) imported_data = dataset.load(new_person.read(),format=’csv’) for data in imported_data: value = Person( data[0], data[1], …
how to update sqlite python table Based on match between another table Question: I tried to use the following code but it is giving errors: import sqlite3 conn = sqlite3.connect(‘stock.db’) cursor = conn.cursor() conn.execute("UPDATE COMSEC_STOCK SET COMSEC_STOCK.quantity = COMSEC_STOCK.quantity -1 FROM COMSEC_STOCK, Comsec_Out_Temp WHERE COMSEC_STOCK.product_id = Comsec_Out_Temp.product_id") cursor.close() conn.commit() Asked By: user21030066 || Source Answers: …
