How do I set the schema in SQLAlchemy for MSSQL?

If you load metadata from the database and load table from the metadata, you can set the schema during table load.

Then create a session and query the table

from sqlalchemy import MetaData, Table
from sqlalchemy.orm import sessionmaker
table = Table({Table Name}, {metadata}, autoload=True, autoload_with={engine}, schema={Schema name})

Session = sessionmaker()
session = Session()
query = session.query(table)

Reading this SO Question Possible to set default schema from connection string? it seems not possible to select schema using connection string.

try a full qualified name :

sql = ('SELECT foo FROM;')

You can also specify the schema name in the class definition (is not your specific case but I think it's a common situation).

For example, if you have a table "dog" into the "animal" schema:

from sqlalchemy import Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()

class Notification(Base):
    __tablename__ = "dog"
    __table_args__ = {"schema": "animal"}
    id = Column(Integer, primary_key=True)
    name = Column(String)