sql sequence with subselect

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Hy,

I have a problem to solve, I have to display through one single sql statement how many women and how many men work in a department (The display must be made like this: 'W:M' )..I only know how to display them through a group by statement, like this:
select sex,count(sex) from employees group by sex;

But I have to display them using subselects and in the way I mentioned upper.

Is there anybody there who can help me?

Thanks a lot

Posted 13-Apr-11 3:33am

stephy_

Updated 13-Apr-11 3:38am

Henry Minute

v2

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[no name] 13-Apr-11 9:39am

What do you mean "display"? The display, or rendering, of your data is separate from the actual query

stephy_ 13-Apr-11 10:01am

Display the result in the bottom of the screen

stephy_ 13-Apr-11 10:02am

for example, if i have 12 men and 15 women in my employees table, the result must be:
12:15

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Costica U · Answer 1 · 2011-04-13T03:41:00

Solution 1

Do you mean something like this?

SQL

select MenCount   =(select count(*) from employees where sex='M'),
       WomenCount =(select count(*) from employees where sex='W')

Posted 13-Apr-11 3:41am

Costica U

Comments

stephy_ 13-Apr-11 10:00am

doesn't work
ORA-00923: FROM keyword not found where expected [SQL State=42000, DB Errorcode=923]
And if i put 'from employees' is the same.. what are MenCount and WomenCount?

stephy_ 13-Apr-11 10:04am

also i have to display the result as 'W:M' , for example, if i have 15 women and 12 men in my employees table, the result must be:

15:12

Chris Meech · Answer 2 · 2011-04-13T04:04:00

Solution 2

Try this

SQL

select woman_count
      ,man_count
  from ( select count(sex) woman_count
               ,0 man_count
           from employees
          where sex='W'
         union all
         select 0 woman_count
               ,count(sex) man_count
           from employees
          where sex='M'
        )
;

Not sure if this is really what you are after, but hoperfully it gives you a starting point. :)

Posted 13-Apr-11 4:04am

Chris Meech

Comments

stephy_ 13-Apr-11 10:10am

thanks .. you know how can i can put a ':' character between the number of men and tha number of women ? (like , 12:15 where 12 is the number of men and 15 the number of women) ?

Chris Meech 13-Apr-11 10:31am

Change it to select to_char(woman_count,'9999')||':'||to_char(man_count,'9999'). Do a search for differrent format specifiers for the to_char function, too.

Dylan Morley · Answer 3 · 2011-04-13T04:19:00

You'd need to convert the results to string and concat them to display how you want

SQL

SELECT CONVERT(VARCHAR(100), (
    SELECT count(*) FROM employees WHERE sex = 'W')) + ':'
+ CONVERT(VARCHAR(10), (SELECT COUNT(*) FROM employees WHERE sex = 'M'))

Seems a bit pointless though! As Mark mentioned, formatting data should be kept separate from your query.

stephy_ · Answer 4 · 2011-04-13T06:12:00

Solution 4

i finally made it, thanks for help:

the solution is here if someone is interested:

select to_char((select count(*) from employees where sex='M') ||':' ||
(select count(*) from employees where sex='W')) from employees
group by 1;

:)have a nice evening

Posted 13-Apr-11 6:12am

stephy_

sql sequence with subselect

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