Sqlalchemy query order by ascending If I was doing this query on MySQL, it would look like; SELECT letter FROM alphabet_table WHERE letter in ('g','a','c','k') ORDER BY FIELDS( letter, 'g','a','c','k'); for the output: To order the results, you can use the order_by() method of the select construct. order_by(desc(SpreadsheetCells. event_date)). select(order_by='name DESC') it works (although I don't like it since it's a little bit "hackish"), but SQLAlchemy gives me the following warning: Dec 5, 2024 · It’s a common scenario that developers encounter, where they need to retrieve data sorted in a specific order. The ORM-level distinct() call includes logic that will automatically add columns from the ORDER BY of the query to the columns clause of the SELECT statement, to satisfy the common need of the database backend that ORDER BY columns be part of the SELECT list when DISTINCT is used. Dec 13, 2023 · In SQLAlchemy, you can use the order_by() function to sort query results in ascending (default) or descending order. Jul 10, 2013 · from sqlalchemy. The order_by() Function. all() In this case, the results will be sorted first by first_column in ascending order and then by second_column in descending order. I've tried the following: entities = MyEntity. I'm using SQLAlchemy ORM. Jan 3, 2024 · Sorting query results is an essential operation in database systems, and SQLAlchemy, the Python SQL toolkit, offers an intuitive way to order data in both ascending (ASC) and descending (DESC) order. I don't think the ASC is required, leaving that off simplifies your code somewhat: The ORDER BY keyword is used to sort the result-set in ascending or descending order. SQLALchemy custom integer sort order. order_by(Equipment. ORDER BY syntax This is the basic syntax to sort your data in ascending order: SELECT columns FROM table ORDER BY Jun 29, 2023 · With vanilla SQL, SQLAlchemy, Flask-SQLAlchemy, and many more tools at your disposal, it’s easy to lose track of what syntax you need when and where you need it. order_by(lambda user: -user. from sqlalchemy import create_engine, Column, Integer, String, desc from sqlalchemy import asc, desc query. By default, it is assumed to be sorted in ascending order unless the column objects are passed through the desc() method. It allows developers to specify the fields by which the results should be sorted, as well as the direction of the sort (ascending or descending). Entry) . order_by(YourModel. order_by(func. sqlalchemy import text; cls. query(YourModel). I'd like to run a query to retrieve the most recent few objects (Entities with the my_date field that are the most recent). time). the_case = case([(table. name) In the above code, we use the order_by() method and pass the column object as an argument. orm. Feb 18, 2025 · SQLAlchemy's order_by() with desc() for Descending Order. How can I use ORDER BY descending in a SQLAlchemy query like the following? This query works, but returns them in ascending order: query = (model. One of its core functionalities is the ability to sort query results in ascending or descending order. Using text-based ordering: If you prefer a string-based approach, SQLAlchemy allows for text-based ordering using its textual SQL expressions: Feb 18, 2025 · Product. query(ListModel) . username). Here’s an example of querying users ordered by name in ascending order: select_stmt = select([users]). Example with SQLAlchemy and ORDER BY Apr 23, 2019 · I'm trying to dynamically create an order_by statement using flask-sqlalchemy query. join(model. name == "OHIO", 1)]), ListModel. Jun 26, 2018 · 本文介绍如何使用SQLAlchemy进行数据排序，包括按发布时间最新排序和按点击数量大小排序的方法。通过实例演示了三种排序方式：直接在查询语句中使用order_by、在定义模型时声明排序方式等。 ORDER BY. The ORDER BY command is used to sort the result set in ascending or descending order. order_by( case([(ListModel. query(Equipment). Example. Apr 1, 2025 · The ORDER BY clause in SQLAlchemy is essential for controlling the order of results returned from a query. age) カスタム関数を使用して、独自の順序を指定することができます。 Feb 1, 2016 · What is the proper way to execute a select statement with an "ORDER BY foo DESC" in SQLAlchemy core? (core, not ORM!) I'm currently including the direction in the order_by directly: mytable. y_index)) # asc Got any sqlalchemy Question? Ask any sqlalchemy Questions and Get Instant Answers from ChatGPT AI: Feb 17, 2025 · This approach gives you the flexibility to choose any column in the model to order by, and also decide whether to order ascending or descending using boolean flags. order_by(users. order_by(asc(SpreadsheetCells. db_session. This takes multiple arguments and your query will be sorted by each of these in turn. query(model. first_column, YourModel. For example, the following code orders a query of the `users` table by the `last_name` column in descending order: python from sqlalchemy import create_engine Feb 18, 2022 · The order_by() clause takes in the column names as the parameters. The ORDER BY command sorts the result set in ascending order by default. c. This is particularly useful when you need to prioritize sorting criteria. order_by(asc(collate(history_sort_order_column, 'NOCASE'))). In Python, SQLAlchemy is a powerful Object-Relational Mapper (ORM) that allows you to interact with databases using Python objects, rather than raw SQL. Jan 10, 2018 · The order is entirely determined by the database, not SQLAlchemy. Q: How do I order a SQLAlchemy query by descending order? A: To order a SQLAlchemy query by descending order, you can use the `order_by` method with the `desc` keyword argument. sql import collate session. desc()). In scenarios where the sorting order is complex or depends on runtime conditions, SQLAlchemy allows for chainable order_by clauses. Consider a simple SQLAlchemy query, which retrieves records but defaults to an ascending order of the entries: Oct 10, 2019 · I need to sort a specific list based on a specific value which is an id that supposed to be on top of the list and the rest would be sorted as ascending order. name). Apr 6, 2019 · Query results can be ordered by using the order_by method on your query. order_by(-MyEntity. created_at. query(User). sql import func query = session. asc() ) Feb 23, 2016 · I'm trying to do a query where one row should always come first and otherwise ordered ascending or descending. Sort the products by price: SELECT * FROM Products ORDER BY Price; Feb 18, 2025 · Product. I am trying to sort an SQLAlchemy ORM object by a field, but with a specific order of the values (which is neither ascending or descending). second_column. The following should work for you. 6. name)], else_=. query. The desc method on each of the columns supplied to order_by can be used to control the direction of the sort. 1. length(User. Together we’ll look at… from sqlalchemy import asc, desc query = User. order_by(lambda user: user. By default, the results are ordered in Sep 20, 2021 · In this article, I will show you a few code examples on how you can sort your data in ascending order using the ORDER BY clause in SQL. The SQLAlchemy query shown in the below code groups the book by genre, then order the books alphabetically based on genre and return the sum of sales for each genre. Syntax Jan 3, 2024 · from sqlalchemy. all(): print (eq) Jan 3, 2024 · To sort results in descending order by date, you can import the desc function from SQLAlchemy and use it in the order_by method: from sqlalchemy import desc # Query with descending order sort data = session. asc()): This first order_by sorts the products in ascending order based on their price. query(ResultsDBHistory). Query. With plain SQL you just add additional ORDER BY clauses, in SQLAlchemy ORM you do the same by chaining order_by methods. Here's the code that I have tried by applying case. order_by(desc(ClassName. Session. The following SQL statement selects all the columns from the "Customers" table, sorted by the "CustomerName" column: Mar 27, 2025 · results = session. Below are several methods to achieve this in SQLAlchemy. desc()): This second order_by further sorts the products within each price group in descending order based on their created_at timestamp. desc()) Chainable and Compound Ordering. all() But these queries return the same objects in the same order. Practical Example. all() Applying Sorts to Relationships Note. Jan 28, 2022 · Pass the SQL query to the execute() function and get all the results using fetchall() function. For example: for eq in session. order_by(MyEntity. y_index)) # desc query. Use a for loop to iterate through the results. order (ascending or descending) order Jul 1, 2013 · SQLAlchemy: How to order query results (order_by) on a relationship's field? 1. python sqlalchemy dynamic order_by. name. all() entities = MyEntity. all() which arguably is a better idea anyway. This guide will take you through the basics to more advanced usage of sorting in SQLAlchemy. query: This accesses the query builder for the Product model. query(ClassName). order_by(*clauses) Apply one or more ORDER BY criteria to the query and return the newly resulting Query. name != "foo", table. model_id). limit(3). To sort the records in descending order, use the DESC keyword. price. Syntax: sqlalchemy. order_by(Product. Here’s how you can do it: Sorting in Ascending Order (Default Behavior) By default, order_by() sorts data in ascending order (ASC). kydph nornoq gfqg htrnv mtij dhuyiyk flymb bhtvbf zrsgjau vdl vxkuqg cmotwru yhuydb bxvsniil ets