Other SQL Clauses
SQLAlchemy ORM also exposes support for other clauses in SQL, such as ORDER BY, GROUP BY, LIMIT, and OFFSET. All of these are supported by this connector:
ORDER BY
The below example sorts by a specified column using the session object's query() method.
rs = session.query(Accounts).order_by(Accounts.AnnualRevenue) for instance in rs: print("Id: ", instance.Id) print("Name: ", instance.Name) print("Industry: ", instance.Industry) print("---------")
Alternatively, you can perform an ORDER BY using the session object's execute() method.
rs = session.execute(Accounts_table.select().order_by(Accounts_table.c.AnnualRevenue)) for instance in rs:
GROUP BY
The below example groups records with a specified column using the session object's query() method.
rs = session.query(func.count(Accounts.Id).label("CustomCount"), Accounts.Name).group_by(Accounts.Name) for instance in rs: print("Count: ", instance.CustomCount) print("Name: ", instance.Name) print("---------")
Alternatively, you can perform a GROUP BY using the session object's execute() method.
rs = session.execute(Accounts_table.select().with_only_columns([func.count(Accounts_table.c.Id).label("CustomCount"), Accounts_table.c.Name]).group_by(Accounts_table.c.Name)) for instance in rs:
LIMIT and OFFSET
The below example skips the first 100 records and fetches the following 25 using the session object's query() method.
rs = session.query(Accounts).limit(25).offset(100) for instance in rs: print("Id: ", instance.Id) print("Name: ", instance.Name) print("Industry: ", instance.Industry) print("---------")
Alternatively, you can set a LIMIT or OFFSET using the session object's execute() method.
rs = session.execute(Accounts_table.select().limit(25).offset(100)) for instance in rs: