Re: sql select query with column 'AS' assignment - Mailing list pgsql-hackers

DzZero wrote:

> Not sure if this is the right newsgroup to use. I did not see a general 
> one or sql statement one for postgres.  Please point me to the correct 
> location if this is wrong and I apologize for the off topic if it is.
> 
> 
> I am attempting to do a select in which I force an existing 
> column(field) to a specific value. I need to do so in order to group 
> data properly.
> 
> ie:
> agi_timesheets=# select distinct 
> employee_id,first_name,last_name,date,sum(hours),"R" as job_code from 
> timesheet group by employee_id,first_name,last_name,date having job_code 
> <> 'H' and job_code <> 'V' and date >= '01-01-2002' and date <= 
> '01-15-2002';
> ERROR:  Attribute 'R' not found
> 
> agi_timesheets=# select distinct 
> employee_id,first_name,last_name,date,sum(hours),job_code AS "R" from 
> timesheet group by employee_id,first_name,last_name,date having job_code 
> <> 'H' and job_code <> 'V' and date >= '01-01-2002' and date <= 
> '01-15-2002';
> ERROR:  Attribute timesheet.job_code must be GROUPed or used in an 
> aggregate function
> 
> agi_timesheets=# select distinct 
> employee_id,first_name,last_name,date,sum(hours),job_code AS 'R' from 
> timesheet group by employee_id,first_name,last_name,date having job_code 
> <> 'H' and job_code <> 'V' and date >= '01-01-2002' and date <= 
> '01-15-2002';
> ERROR:  parser: parse error at or near "'"
> 
> agi_timesheets=# select distinct 
> employee_id,first_name,last_name,date,sum(hours),job_code = 'R' from 
> timesheet group by employee_id,first_name,last_name,date having job_code 
> <> 'H' and job_code <> 'V' and date >= '01-01-2002' and date <= 
> '01-15-2002';
> ERROR:  Attribute timesheet.job_code must be GROUPed or used in an 
> aggregate function
> 
> 
> etc. etc. etc.  I have tried all possible combinations (or I think so) 
> of "R", 'R', R using = or AS on either side of job_code.  Nothing seems 
> to work.
> 
> Several of these combinations work in MySQL, Access, and Oracle. Or at 
> least according to those online I have spoke to they do.
> 
> Can any explain to me what I am doing wrong? If this is possible in 
> PostgreSQL? Or the proper way of doing this? Or even a source of 
> information that explains it. The closest source I found was obviously 
> the psql documentation but I have yet to find a specific example of what 
> I am doing.
> 
> Thanks.
> 

BTW.If I group by job_code on the last statement I posted it does so but 
it groups them as if job_code has the orginal values in it. Also I end 
up with something like:
 employee_id | first_name | last_name  |    date    | sum | ?column?
-------------+------------+------------+------------+-----+----------           7 | Larry      | James      |
2002-01-02|   8 | f
 


I'm lost. heh