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SyBase SQL Syntax

Hey guys,
 
I have 2 tables using SyBase SQL Anywhere 10
Employee Table
EmpNum
Firstname
Lastname
 
Sales Table
Transact
WhoStart (EmpNum)
WhoClosed   (EmpNum)
 
I want to return the transaction number and the first name’s of the employee who started and closed the sale. Usually the person who starts and closes is the same, but sometimes it’s not.
 
Help?
0
triphen
Asked:
triphen
  • 2
2 Solutions
 
wilcoxonCommented:
This should do what you want...
select s.Transact, es.Firstname, ec.Firstname
from Sales s, Employee es, Employee ec
where s.WhoStart = es.EmpNum
and s.WhoClosed = ec.EmpNum

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0
 
PortletPaulCommented:
I'd prefer to see ANSI join syntax used, the following is the equivalent of the prior comment:
SELECT
        s.Transact
      , es.Firstname AS StartByName
      , ec.Firstname AS ClosedByName
FROM Sales s
INNER JOIN Employee AS es ON s.WhoStart = es.EmpNum
INNER JOIN Employee AS ec ON s.WhoClosed = ec.EmpNum /* but might need LEFT JOIN ?? */
;

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whilst it may be unlikely, if there is any chance that a record in that Sales tables does not have a value for WhoClosed, then you would want to use a LEFT JOIN

(I do hope you would always have values in WhoStart, but if some are missing then it too might need a left join)
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wilcoxonCommented:
Tangent...  Personally I *HATE* the ANSI join syntax.  I find it much harder to read than the "old" join syntax.  For this query, it's not bad but, as it gets more complex, the less I like ANSI joins.
0
 
triphenAuthor Commented:
Thanks guys! I ended up using the ANSI join syntax.

left outer join dba.employee as es
on es.empnum = header.whostart

left outer join dba.employee as ec
on ec.empnum = header.whoclose
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