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 following example sorts by a specified column using the session object's query() method:rs = session.query([Workspace].[Model].[Sales]).order_by([Workspace].[Model].[Sales].Price)
for instance in rs:
print("Id: ", instance.Id)
print("Region: ", instance.Region)
print("Product: ", instance.Product)
print("---------")
You can also use the session object's execute() method perform an ORDER BY. For example:
rs = session.execute([Workspace].[Model].[Sales]_table.select().order_by([Workspace].[Model].[Sales]_table.c.Price)) for instance in rs:
GROUP BY
The following example uses the session object's query() method to group records with a specified column:rs = session.query(func.count([Workspace].[Model].[Sales].Id).label("CustomCount"), [Workspace].[Model].[Sales].Region).group_by([Workspace].[Model].[Sales].Region)
for instance in rs:
print("Count: ", instance.CustomCount)
print("Region: ", instance.Region)
print("---------")
You can also use the session object's execute() method to perform a GROUP BY:
rs = session.execute([Workspace].[Model].[Sales]_table.select().with_only_columns([func.count([Workspace].[Model].[Sales]_table.c.Id).label("CustomCount"), [Workspace].[Model].[Sales]_table.c.Region]).group_by([Workspace].[Model].[Sales]_table.c.Region))
for instance in rs:
LIMIT and OFFSET
The following example uses the session object's query() method to skip the first 100 records and fetch the following 25:rs = session.query([Workspace].[Model].[Sales]).limit(25).offset(100)
for instance in rs:
print("Id: ", instance.Id)
print("Region: ", instance.Region)
print("Product: ", instance.Product)
print("---------")
You can also use the session object's execute() method to set a LIMIT or OFFSET:
rs = session.execute([Workspace].[Model].[Sales]_table.select().limit(25).offset(100)) for instance in rs: