Introduction to Databases in Python
Jason Myers
Co-Author of Essential SQLAlchemy and Software Engineer
delete()
statementdelete()
takes the table we are loading data into as the argumentwhere()
clause is used to choose which rows to deletefrom sqlalchemy import delete
stmt = select([func.count(extra_employees.columns.id)])
connection.execute(stmt).scalar()
3
delete_stmt = delete(extra_employees)
result_proxy = connection.execute(delete_stmt) result_proxy.rowcount
3
where()
clause that will select all the records you want to deletestmt = delete(employees).where(employees.columns.id == 3)
result_proxy = connection.execute(stmt) result_proxy.rowcount
1
drop()
method on the tableextra_employees.drop(engine)
print(extra_employees.exists(engine))
False
drop_all()
method on MetaDatametadata.drop_all(engine)
engine.table_names()
[]
Introduction to Databases in Python