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(Resources).order_by(Resources.AnnualRevenue) for instance in rs: print("Id: ", instance.Id) print("FullPath: ", instance.FullPath) print("Permission: ", instance.Permission) print("---------")
Alternatively, you can perform an ORDER BY using the session object's execute() method.
rs = session.execute(Resources_table.select().order_by(Resources_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(Resources.Id).label("CustomCount"), Resources.FullPath).group_by(Resources.FullPath) for instance in rs: print("Count: ", instance.CustomCount) print("FullPath: ", instance.FullPath) print("---------")
Alternatively, you can perform a GROUP BY using the session object's execute() method.
rs = session.execute(Resources_table.select().with_only_columns([func.count(Resources_table.c.Id).label("CustomCount"), Resources_table.c.FullPath]).group_by(Resources_table.c.FullPath)) 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(Resources).limit(25).offset(100) for instance in rs: print("Id: ", instance.Id) print("FullPath: ", instance.FullPath) print("Permission: ", instance.Permission) print("---------")
Alternatively, you can set a LIMIT or OFFSET using the session object's execute() method.
rs = session.execute(Resources_table.select().limit(25).offset(100)) for instance in rs: