Returning List and Scalars There are a number of methods of Query object that immediately issue SQL and return a value containing loaded database results. Here’s a brief rundown of returning list and scalars − all() It returns a list. Given below is the line of code for all() function. session.query(Customers).all() Python console displays following […]
Author Archives: user
SQLAlchemy ORM – Applying Filter In this chapter, we will discuss how to apply filter and also certain filter operations along with their codes. Resultset represented by Query object can be subjected to certain criteria by using filter() method. The general usage of filter method is as follows − session.query(class).filter(criteria) In the following example, resultset […]
SQLAlchemy ORM – Updating Objects In this chapter, we will see how to modify or update the table with desired values. To modify data of a certain attribute of any object, we have to assign new value to it and commit the changes to make the change persistent. Let us fetch an object from the […]