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Update query on unique_id

21agdgcf
21agdgcf asked
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Last Modified: 2008-02-26
Hi Experts
I am doing a select and insert statement to insert service records in an invoices table.
The primary key for this table is seeded.
The records in the invoices table are based on a customer_id and invoice date
Therefore each month this statement is run and the records are inserted so that we end up with anything from 1 - 200 records per customer_id for each invoice date.

What I need to do is create and an invoice_no field who's value is unique for each customer by date like:

Unique_id  Customer_ id     invoice_no    invoice_date  service_id
1                10010                      1            01/01/06         10
2                10010                      1            01/01/06         11
3                10011                      2            01/01/06         13
4                10011                      2            01/01/06          10
5                10010                      3            01/02/06         10
6                10010                      3             01/02/06         11
7                10011                      4             01/02/06         12
8                10011                      4             01/02/06         13
9                10011                      4              01/02/06        14

What I would like to do is run a script after the initial select and insert statement to set the the invoice number as above
My problem is how to group the set statement or if you even can

Many Thanks


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Guy Hengel [angelIII / a3]Billing Engineer
CERTIFIED EXPERT
Most Valuable Expert 2014
Top Expert 2009

Commented:
please try this:
update yourtable
  set invoice_no =
  ( select sum(1)
   from ( select customer_id, invoice_date from yourtable group by customer_id, invoice_date ) as l
   where l.invoice_date < t.invoice_date OR ( l.invoice_date = t.invoice_date and l.customer_id <= t.customer_id )
  )
from yourtable t

Author

Commented:
HI angelIII

That seems to work fine but has highlighted another problem

When the orgional select insert statement is run the invoice_date is populated with Getdate() and as a result I have date fields that have different times so when I run your script and it groups by invoice_date it is also taking into account time

Within you script can I use just the date part of the invoice field.
Billing Engineer
CERTIFIED EXPERT
Most Valuable Expert 2014
Top Expert 2009
Commented:
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Author

Commented:
Thanks angelIII

That solves the problem

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