I am trying to develop a method whereby it will allow the user to search by a chosen field and value eg. SELECT * FROM table WHERE column_field = ‘value’. It executes just fine in SQL lite but when I bring it into my IDE nothing is printing out. Any advice much appreciated. Answer From sqlite doc …
Tag: python-3.x
Translate Oracle query into pandas dataframe handling
I have the below dataframe: PARAM1 PARAM2 VALUE A X TUE, WED A Y NO B X MON, WED B Y YES I would like a pythonic way of obtaining the distinct values of param1 that satisfy EITHER of these conditions: Their corresponding param2 = ‘X’ contains the string ‘MON’ Their corresponding param2…
Problem in a function that extracts and saves fields from a database table to another
If in the combo_Nations combobox I select a specific Country (the country name is extracted from the “All_Nations” table in the “Nations_name” column), I would like to get the corresponding ID_Nations of the respective selected country (ID_Nations is found in the same table “All_…
In the Treeview I only display the ID of a line and not the remaining (empty) fields
I receive an error updating the TreeView, after clicking on the button to filter the data of a database through two comboboxes. The filtering appears to be successful, but only the staff ID is displayed in the tree view and not all related data. Without using the filter button, everything is fine. This is the…
Django ORM compare tuples / lexicographic ordering
As part of some custom cursor-based pagination code in Python Django, I would like to have the below filtering and ordering on a generic Queryset (where I don’t know the table name up front) How can this be expressed in terms of the Django ORM? Note I would like the SQL to keep the tuple comparison and …
psycopg2: syntax error at or near “offset”, datetime object
I am running the following SQL query using Python and psycopg2 and is getting errors. SQL query: Errors: Variables and their values Python Functions: How should i fix this? Answer I solved this issue by converting the values of in the list [‘timestamps’] to str from datetime.
Efficient syntax to update 5K rows in BQ table
I’m trying to update ~5K rows in bq using python client. Here is my current try: and How can I map the account id list to a string as follows which seems more efficient(?) UPDATE mytable SET somefield=( CASE WHEN (id=100) THEN ‘some value removed’ WHEN (id=101) THEN ‘some value removed…
is there a method to conect to postgresql (dbeaver ) from pyspark?
hello i installed pyspark now and i have a database postgres in local in DBeaver : how can i connect to postgres from pyspark please i tried this but i have an error Answer You need to add the jars you want to use when creating the sparkSession. See this : https://spark.apache.org/docs/2.4.7/submitting-applic…
Sqlite3 in Python not fetching data
I have a sqlite3 DB with a few rows in it. When I try to fetch data from it in Python, fetchall returns an empty list. The data is being inserted in a different part of the project fine. I verified this by opening the DB in “DB Browser for SQLite” and running the following command. This returned t…
Database Error: NameError: name ‘db’ is not defined. What am I doing wrong?
On the web I found this illustration to create a database with gui with Tkinter. Everything ok, except when I enter the data and click on the Add button. I’m getting: NameError: name ‘db’ is not defined I think what I am wrong is nonsense in this part of the code. What am I doing wrong? Here…