Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Magic!</p> <pre><code>;with Employees (EmployeeId, HireDate, DepartmentId) as ( select 1, getdate()-10, 1 union select 2, getdate()-10, 1 union select 3, getdate()-8, 2 union select 4, getdate()-7, 3 union select 5, getdate()-6, 1 ) select cast(datepart(year, HireDate) as varchar(4)) + right(replicate('0' ,4)+cast(DepartmentId as varchar(4)), 4) + right(replicate('0' ,4)+cast(row_number() over (partition by DepartmentId,datepart(year, HireDate) order by HireDate asc) as varchar(4)), 4) EmployeeCode ,DepartmentId ,EmployeeId ,convert(varchar(10), HireDate, 120) HireDate from Employees </code></pre> <p>Will give us the following:</p> <pre><code>EmployeeCode DepartmentId EmployeeId HireDate ------------ ------------ ----------- ---------- 201000010001 1 1 2010-09-05 201000010002 1 2 2010-09-05 201000010003 1 5 2010-09-09 201000020001 2 3 2010-09-07 201000030001 3 4 2010-09-08 </code></pre> <p><strong>UPDATE:</strong></p> <p>Now supposing you want to add a new employee to the Department #2 today. Here's how I'd calculate a new EmployeeCode for this employee:</p> <pre><code>declare @DepartmentId int set @DepartmentId = 2 select cast(datepart(year, getdate()) as varchar(4)) + right(replicate('0' ,4)+cast(@DepartmentId as varchar(4)), 4) + right(replicate('0' ,4)+cast(isnull(max(cast(right(EmployeeCode,4) as smallint)),0) + 1 as varchar(4)), 4) EmployeeCode from dbo.Employees as e where DepartmentId = @DepartmentId and datepart(year, hiredate) = datepart(year, getdate()) </code></pre> <p><strong>UPDATE:</strong></p> <p>As you can see, if you add an employee to a hitherto nonexistent department, say, #200, then the max clause would return null as there are no employees in this department and it'd get isnulled to 0 + 1, so you'd get a perfectly normal <code>201002000001</code> for that employee.</p> <p>Suppose a year passed and now it's 2011 and this last filtering clause again would null the max clause and the procedure would repeat and we'd get <code>201102000001</code> for a new employee in that new department this next-year.</p>
    singulars
    1. This table or related slice is empty.
    1. POCalculate column id with logic
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USDenis Valeev
    1. USDenis Valeev
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POCalculate column id with logic
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COWhen I need to insert a new employee, how would I now what is the next EmpoyeeId to use?
      singulars
      1. PO
      1. USNaphtali Davies
    2. CO@Naphtali Davies, you'll have to shred this code and figure out the last one in order to increment the running number.
      singulars
      1. PO
      1. USDenis Valeev
    3. CODenis, Thanks a lot for your help. Your latest updated doesn't support the need to reset the xxxx part at the begining of each year
      singulars
      1. PO
      1. USNaphtali Davies
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload