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 […]
Category Archives: sqlalchemy
SQLAlchemy ORM – Filter Operators Now, we will learn the filter operations with their respective codes and output. Equals The usual operator used is == and it applies the criteria to check equality. result = session.query(Customers).filter(Customers.id == 2) for row in result: print (“ID:”, row.id, “Name: “,row.name, “Address:”,row.address, “Email:”,row.email) SQLAlchemy will send following SQL expression […]
SQLAlchemy ORM – Textual SQL Earlier, textual SQL using text() function has been explained from the perspective of core expression language of SQLAlchemy. Now we shall discuss it from ORM point of view. Literal strings can be used flexibly with Query object by specifying their use with the text() construct. Most applicable methods accept it. […]