Databases
StackOverflow2013
Postsdbo
POOracle 10g Recursive Query
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POOracle 10g Recursive Query
    primarykey
    data
    text
    <p>I have the following recursive query which would run in 11g but is not supported in Oracle 10g database:</p> <pre><code>with st as ( select rownum id, case when rownum-1 &lt; 1 then null else rownum-1 end parent_id, customer, tickets from tickets ), st2(id, parent_id, customer, tickets, offset) as ( select id, parent_id, shuffler_id, subno, contrno, tickets, 0 offset from st where id = 1 union all select st2.id, st2.parent_id, st2.tickets, (st.tickets + st.offset) offset from st, st2 where st2.parent_id = st.id ) select * from st2 </code></pre> <p>What I'm trying to do is to calculate an offset for each row based on its previous row columns <code>tickets</code> and <code>offset</code> (same calculated column), and I'm starting the first row with an offset of 0; the fact that I need to depend on a column that I'm calculating during the execution of the query requires recursion.</p> <p>The issue is the above query is not supported in Oracle 10g, so I tried to use <code>connect by</code> instead which works, but the ugly part is it's extremely inefficient:</p> <pre><code>with st as ( select rownum id, case when rownum-1 &lt; 1 then null else rownum-1 end parent_id, customer, tickets from tickets ) select id, parent_id, customer, tickets, ( select nvl(sum(tickets), 0) from st where level &lt; x.id start with id = 1 connect by prior id = parent_id ) offset from st x </code></pre> <p>Using the 2nd query I'm summing all the previous rows, which does the job but is redundant as well and I cannot depend on when this table grows to millions of records.</p> <p>Any idea on how to implement something similar to the first query in Oracle 10g database?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USAziz Alfoudari
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POOracle 10g Recursive Query
      1. This table or related slice is empty.
      1. VTModeratorReview
    2. VO
      singulars
      1. POOracle 10g Recursive Query
      1. This table or related slice is empty.
      1. VTModeratorReview
    1. This table or related slice is empty.
 

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