[sqlalchemy] Help on Counting Please
Hi All Please excuse this relatively noob question, but I can not for the life of me find the answer in docs. (Probably because I don't know what I'm looking for). I have a table with two columns A and B. A can have many duplicate values. e.g. A B 1 a 1 b 1 c 1 d 2 f 2 g 3 z I want to have a result that returns all the values of A, and how many times they appear in the table. Sample result from above would be; 14 22 31 Clearly, I'm no SQL wizz, so I have the added issue of not knowing the raw SQL, let alone SQLAlchemy's take on it. If you can provide the answer using table.select() type query, rather than the ORM equivalent it would be most appreciated. :-) Thanks in anticipation. Cheers Warwick -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/groups/opt_out.
Re: [sqlalchemy] Help on Counting Please
Hi, Have you tried: select A, count(*) from the_table group by A On Wed, Oct 23, 2013 at 4:17 PM, Warwick Prince warwi...@mushroomsys.com wrote: Hi All Please excuse this relatively noob question, but I can not for the life of me find the answer in docs. (Probably because I don't know what I'm looking for). I have a table with two columns A and B. A can have many duplicate values. e.g. A B 1 a 1 b 1 c 1 d 2 f 2 g 3 z I want to have a result that returns all the values of A, and how many times they appear in the table. Sample result from above would be; 14 22 31 Clearly, I'm no SQL wizz, so I have the added issue of not knowing the raw SQL, let alone SQLAlchemy's take on it. If you can provide the answer using table.select() type query, rather than the ORM equivalent it would be most appreciated. :-) Thanks in anticipation. Cheers Warwick -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups sqlalchemy group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/groups/opt_out.
Re: [sqlalchemy] Help on Counting Please
Hi Anh
Thanks for clearing my head. I had devised considerably more complex attempts!
So, the answer is;
table.select().group_by(table.c.A).with_only_columns([table.c.A,
func.count(1).label('count')]).execute().fetchall()
:-)
n 23/10/2013, at 7:29 PM, anh le anh...@gmail.com wrote:
Hi,
Have you tried:
select A, count(*) from the_table group by A
On Wed, Oct 23, 2013 at 4:17 PM, Warwick Prince
warwi...@mushroomsys.com wrote:
Hi All
Please excuse this relatively noob question, but I can not for the life of
me find the answer in docs. (Probably because I don't know what I'm looking
for).
I have a table with two columns A and B. A can have many duplicate
values. e.g.
A B
1 a
1 b
1 c
1 d
2 f
2 g
3 z
I want to have a result that returns all the values of A, and how many times
they appear in the table.
Sample result from above would be;
14
22
31
Clearly, I'm no SQL wizz, so I have the added issue of not knowing the raw
SQL, let alone SQLAlchemy's take on it.
If you can provide the answer using table.select() type query, rather than
the ORM equivalent it would be most appreciated. :-)
Thanks in anticipation.
Cheers
Warwick
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