by selecting each of the nth order key without using a rank value

Hello

Suppose we have a table of Orders

create table orders)

order_no number primary key,

customer_id number,

item_id number);

insert into orders)

Select 101, 601, 90 of all the double union

Select 103, 602, 100 of all the double union

Select 603, 105, 110 Union double all the

Select 107, 604, 120 Union double all the

Select double union all 108, 605, 130

Select double union all 109, 606, 140

Select 110, 607, 150 Union double all the

Select 111, 608, 160 Union double all the

Select 112, 609, 170 Union double all the

Select 114, 610, 180 doubles);

How can we take every third order_no controlled key order_no without use of rank and connect function using sql.

as

105,

109,

112

can someone please help?

Thank you

Max

How can we choose each third order_no order_no keys without the use of grade -controlled

Reason is?

Anyway, using ROWNUM then:

SQL > select order_no

2 starting at)

3. Select order_no, rownum rn

4 of)

5. Select order_no

6 orders

7 order of order_no

8    )

9)

10 where mod (rn, 3) = 0;

ORDER_NO

----------

105

109

112

Tags: Database

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