sql update column from another column in the same table in sqlalchemy

Question

UPDATE table1 SET column1 = column2 WHERE column3 = 'abc';

How do I execute the above query in sql alchemy ORM

table1 = Table('table1', metadata,
    Column("column1",     SmallInteger(),     nullable=False, autoincrement=False),
    Column("column2",     SmallInteger(),    nullable=False, autoincrement=False),
    Column("column3",     String(length=255), nullable=False)
)

class Table1(object):
    pass
mapper(Table1, table1)

kid · Accepted Answer · 2015-02-16 11:09:04Z

1

DBSession.query(table1).filter_by(column3 = 'abc').update({"column1":column2}, synchronize_session=False)

use this

where  ==== filter_by
table1 === class containing the table1 schema
update command with columns as key in query

http://docs.sqlalchemy.org/en/latest/core/dml.html follow this link will guide you

edited Feb 16, 2015 at 11:09

answered Feb 16, 2015 at 10:54

kid

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1 Comment

dumper Over a year ago

I get this error AttributeError: Neither 'InstrumentedAttribute' object nor 'Comparator' object has an attribute 'self_group'

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