I am trying to store some tables I create in my code in an RDS instance using psycopg2. The script runs without issue and I can see the table being stored correctly in the DB. However, if I try to retrieve the query, I only see the columns, but no data: This script runs without issues and, printing out file_check
Tag: python
Pandas equivalent for SQL – arithmetic expression within aggregate function
I am a pandas newbie coming from a SQL background although have some exposure to Python. I was wondering if there is a simple way to do the following SQL code in pandas dataframe: Below is all I got so far there doesn’t seem to be a syntax to include arithmetic expressions: Thanks in advance. Answer try this,
Tables being queried with SQL and Sqlalchemy have same column names
I am querying a variety of different tables in a mysql database with sqlalchemy, and sql query code. My issue right now is renaming some of the columns being joined. The queries are all coming into …
How do I extract these SQL queries from these pandas dataframes?
SQL QUERIES Using SQL or Pandas, please tell me how to 1. Compare the monthly sales (GMV) trend in Q4 2019, across all countries (venture_code) 2. Show the top 10 brands for each product category, based on total sales (GMV) I wrote but got the query wrong! Answer Concerning the error, you have a space in the column name. In
Groupby fill missing values in dataframe based on average of previous values available and next value available
I have data frame which has some groups and I want to fill the missing values based on last previous available and next value available average of score column i.e. (previous value+next value)/2. I …
SQLite – How to use VARIABLE for TABLE NAME + VARIABLE FOR INSERT VALUES
im new in programing, starting with python I found this script in a post (link below) query = ‘SELECT * FROM {}’.format(table) c.execute(query) How to use variable for SQLite table name it worked, …
The python says ” ‘property’ object has no attribute ‘format'”
I am trying to use spark and I am stuck on the reading the data.. here is my code.. and the error message says that ‘property’ object has no attribute ‘format’ So I think there are something wrong with format.. I tried to read the code of spark but it was just too hard. I will really appreciate if anybody
Inserting data frames to teradata by using teradatasql package
I am using teradatasql package which native solution of Teradata as a connector between python and Teradata to load data from DB. However, I want to insert data frames I created in python back to DB. Is it possible to write data frames to the database by using teradatasql package? Thanks Answer SQLAlchemy provides the linkage between pandas dataframes and
CSV to SQL, but all values are NULL
I am trying to convert a set of relational .csv files to a db with sqlite3: This runs without error and produces a database with the correct tables which have the correct columns. The rows, however, are all NULL for some reason. I have tried debugging the insertion line to see what is going on. I stepped into the executemany()
How to read JSON value in MySQL
The JSON output I need to insert into my database but my source code throws an error: The source code: Can anyone help me with this, as I need to get values for open, close, high and low. error: Answer you have 5 columns, hence 5 bind variables. Your insert template is over complicated with any database operations you should