To put it more clear why:
rows = session.query(*[func.count().over().label(count)]+map(lambda column:
MyClass.__dict__[columns],columns)).filter(...).limit(n).offset(m).all()
works and
*rows = session.query(*[func.count().*
*over().label(count)]+map(**lambda column:
whats the SQL you're looking for ?work it out from a SQL perspective first
- get an exact SELECT, then run it straight on that database, to work out what
should be done here. Window functions + DISTINCT + LIMIT/OFFSET sounds like
it's really getting out there, and I'm not even sure what
Hi,
I am trying to write this SQL coomand:
SELECT DISTINCT(col1, col2,col3) FROM mytable WHERE col1='something'
in sqlalchemy form:
columns=['col1','col2','col3']
*rows = session.query(*[func.count().over().label(count)]+map(lambda column:
Am Mittwoch, 16. Mai 2012 12:07:26 UTC+2 schrieb Eduardo:
Hello,
I have got a query of the following type:
rows = session.query(*[func.count().over().label(count)]+map(lambda column:
MyClass.__dict__[columns],columns)).filter(...).limit(n).offset(m).all()
it returns the number of
*SORRY
I want to create query that will return as a first element the number of
hits *
*SELECT COUNT(*) FROM(SELECT (DISTINCT(col1,col2,col3)) FROM mytable where
col1='something**' LIMIT 1 OFFSET 2)
and in the second part should be values of the hits
**SELECT (DISTINCT(col1,col2,col3)) FROM
print Session().query(
mytable.c.col1,
mytable.c.col2,
mytable.c.col3).\
distinct().\
filter(mytable.c.col1=='something').\
limit(1).offset(2).\
from_self(func.count('*'))
or just say count() instead of from_self(), will
Am Mittwoch, 16. Mai 2012 19:59:10 UTC+2 schrieb Michael Bayer:
If I put count() the result will be the number of hits I would like to have
both the number of hits and resulting column values for example
[(33,val1,val2,val3),(33, val21,val22,val23),...]
If I execute it with
Session().query(
On May 16, 2012, at 2:20 PM, Eduardo wrote:
Am Mittwoch, 16. Mai 2012 19:59:10 UTC+2 schrieb Michael Bayer:
If I put count() the result will be the number of hits I would like to have
both the number of hits and resulting column values for example
you'd need to use GROUP BY for that.
