rev 2020.12.18.38240, Stack Overflow works best with JavaScript enabled, Where developers & technologists share private knowledge with coworkers, Programming & related technical career opportunities, Recruit tech talent & build your employer brand, Reach developers & technologists worldwide, @IgnacioVazquez-Abrams Nice. Python psycopg2 postgres select columns including field names, python.org/dev/peps/pep-0249/#description, How digital identity protects your software, Podcast 297: All Time Highs: Talking crypto with Li Ouyang. Why doesn't NASA release all the aerospace technology into public domain? import psycopg2. rows = [] for raw_row in cr.fetchall(): row = {} #start with an empty dict #Each To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Pandas where I don't necessarily know all the field names in advance. If what you want is a dataframe with the data from the db table as its values and the dataframe column names being the field names you read in from the db, then this should do what you want: You could also map over it which looks a bit nicer: You can use two loop cases, to not use pandas: Thanks for contributing an answer to Stack Overflow! 私も同様の問題に直面していました。私はこれを解決するために簡単なトリックを使用します。次のようなリストに列名があるとします col_name = ['a', 'b', 'c'] その後、次のことができます for row in cursor.fetchone(): print Zip(col Does a parabolic trajectory really exist in nature? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. As a result MySQLdb has fetchone() and fetchmany() methods of cursor object to fetch records more efficiently. Making statements based on opinion; back them up with references or personal experience. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. Is it normal for good PhD advisors to micromanage early PhD students? Is there any scientific way a ship could fall off the edge of the world? How does difficulty affect the game in Cyberpunk 2077? Here are the steps that you may follow. Is my LED driver fundamentally incorrect, or can I compensate it somehow? The attribute is None for operations that do not return rows or if the cursor has not had an operation invoked via the execute*() methods yet. How does numpy generate samples from a beta distribution? How to make a flat list out of list of lists? To get column names in the same query as data rows, you can use the description field of the cursor: If you want to have a named tuple obj from db query you can use the following snippet: This allows you to access record values as if they were class properties i.e. The [] has special meaning in PostgreSQL. The notes column in the bar table is of type text[]. How digital identity protects your software, Podcast 297: All Time Highs: Talking crypto with Li Ouyang, Print Header returned from the Presto query running via Python script, How to describe columns (get their names, data types, etc.) of a SQL query in PostgreSQL. eg. This seems to me the easiest. What's the most efficient way to safely convert from Datetime2 back to Datetime. How to select the nth row in a SQL database table? Hi I'd like to get a table from a database, but include the field names so I can use them from column headings in e.g. Why were early 3D games so full of muted colours? Get the column names with python from a SQLite database is possible! import psycopg2. You should update your answer with the LIMIT 0 suggestion. Asking for help, clarification, or responding to other answers. But as-shown, your code (self.sql_cursor.fetchall()) will not capture any results. Fiducial marks: Do they need to be a pad or is it okay if I use the top silk layer? Otherwise you will retrieve the whole table just to check the names. This tutorial shows you various ways to query data from PostgreSQL table in Python using psycopg. Select/Fetch Records with Column Names In this example we will perform a select just like we did above but this time we will return columns as a Python Dictionary so column names are present. Pandas where I don't necessarily know all the field names in advance so if my To return an array that contains a single column from all of the remaining rows in the result set: Call the PDOStatement::fetchAll method, passing the PDO::FETCH_COLUMN constant as the first argument, and the column you want to retrieve as the second argument. To get a list of column names from a table in a SQLite database or getting the row or rows back as a dictionary #!/usr/bin/python import psycopg2 #note that we have to import the Psycopg2 extras library! 2 – Database setup I will assume you already have It is a sequence of Column instances, each one describing one result column in order. 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