Need help with SQL for the following logic.

I have a table with 3 columns and the following data:
DATE NAME S_NO
1 ABC1 JANUARY 1, 2001
1 ABC2 JANUARY 10, 2001
1 ABC3
1 ABC4
ABC1 2 1 DECEMBER 2010
ABC2 2
2 ABC3 DECEMBER 10, 2010
2 ABC4 DECEMBER 5, 2010
3 XYZ1 FEBRUARY 1, 2001
3 XYZ2 FEBRUARY 2, 2001

I need to retrieve the value of NAME for each S_NO corresponding to the maximum DATE. In the above example, it will be:
1 ABC2
2 ABC3
3 XYZ2 
/* Formatted on 9/10/2012 2:50:13 PM (QP5 v5.139.911.3011) */
WITH t AS (SELECT 1 S_NO, 'ABC1' NAME, '1-JAN-2001' dt FROM DUAL
           UNION ALL
           SELECT 1, 'ABC2', ' 10-JAN-2001' FROM DUAL
           UNION ALL
           SELECT 1, 'ABC3', NULL FROM DUAL
           UNION ALL
           SELECT 1, 'ABC4', NULL FROM DUAL
           UNION ALL
           SELECT 2, 'ABC1', '1-DEC-2010' FROM DUAL
           UNION ALL
           SELECT 2, 'ABC2', NULL FROM DUAL
           UNION ALL
           SELECT 2, 'ABC3', '10-DEC-2010' FROM DUAL
           UNION ALL
           SELECT 2, 'ABC4', '5-DEC-2010' FROM DUAL
           UNION ALL
           SELECT 3, 'XYZ1', '1-FEB-2001' FROM DUAL
           UNION ALL
           SELECT 3, 'XYZ2', '2-FEB-2001' FROM DUAL)
SELECT *
  FROM (SELECT S_NO,
               name,
               RANK ()
               OVER (PARTITION BY s_no
                     ORDER BY TO_DATE (dt, 'dd-mon-yyyy') DESC)
                  rk
          FROM t
         WHERE dt IS NOT NULL)
 WHERE 1 = RK

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    where upper (a.destination_type_code) = "EXPENSES".

    or (upper (a.destination_type_code) = 'WORKSHOP'

    and b.item_id is null

    )

    A.po_header_id group,

    c.receipt_num,

    a.po_line_id,

    a.destination_type_code,

    b.item_id,

    b.item_description,

    a.unit_of_measure,

    d.release_num

    ) rcv1

    On po.po_header_id = rcv1.po_header_id

    left outer join

    (select a.po_line_id,

    Sum (a.Quantity) transact_qty,

    a.po_header_id,

    c.receipt_num

    from (select shipment_header_id,

    shipment_line_id,

    po_release_id,

    po_header_id,

    quantity

    of rcv_transactions

    where upper (a.transaction_type) = "RETURN to THE RECIPIENTS.

    ) a

    inner join

    rcv_shipment_lines b

    On a.shipment_line_id = b.shipment_line_id

    inner join

    c rcv_shipment_headers

    On a.shipment_header_id = c.shipment_header_id

    left outer join

    po_releases_all d

    On a.po_release_id = d.po_release_id

    A.po_line_id group,

    a.po_header_id,

    c.receipt_num

    ) rcv2

    On rcv1.po_line_id = rcv2.po_line_id

    and rcv1.receipt_num = rcv2.receipt_num

    where rcv1.transact_qty! = nvl(rcv2.transact_qty,999999999)

    Concerning

    Etbin

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    I need your help to find the result in the following way...


    Emp No    New_name    Old_Name
-----------------------------------------------
1           Name3        Name2
1           Name2        Name1
    create table emp(emp_id number(10),
emp_name varchar(50),
constraints emp_pk primary key(emp_id) );



create table emp_audit(
audit_id number(10),
emp_id number(10),
emp_name varchar(50),
audit_date date,
constraints emp_audit_pk primary key (audit_id),
constraints  emp_audit_emp_fk foreign key(emp_id)  references emp(emp_id));

insert into emp values(1,'Name3');


insert into EMP_AUDIT (audit_id, emp_id, emp_name, audit_date)
values (1, 1, 'Name1', to_date('14-08-2011', 'dd-mm-yyyy'));
insert into EMP_AUDIT (audit_id, emp_id, emp_name, audit_date)
values (2, 1, 'Name2', to_date('15-08-2011', 'dd-mm-yyyy'));
commit;
    Thank you...

    Dipabkar Bédard (DB) wrote:

    We write is the query without using "partition by" in oracle...?

    with t as (
           select  audit_id,
                   emp_id,
                   emp_name,
                   row_number() over(order by audit_id) rn
             from  emp_audit
             order by emp_id,
                      audit_id
          )
select  a.audit_id,
        a.emp_id,
        a.emp_name old_name,
        nvl(b.emp_name,(select c.emp_name from emp c where c.emp_id = a.emp_id)) new_name
  from  t a left join t b
        on (
                b.emp_id = a.emp_id
            and
                b.rn = a.rn + 1
           )
/

  AUDIT_ID     EMP_ID OLD_NAME                                           NEW_NAME
---------- ---------- -------------------------------------------------- ------------
         1          1 Name1                                              Name2
         2          1 Name2                                              Name3

SQL>

    And without analytical functions:

    with t1 as (
            select  audit_id,
                    emp_id,
                    emp_name
              from  emp_audit
              order by emp_id,
                       audit_id
           ),
     t2 as (
            select  audit_id,
                    emp_id,
                    emp_name,
                    rownum rn
              from  t1
           )
select  a.audit_id,
        a.emp_id,
        a.emp_name old_name,
        nvl(b.emp_name,(select c.emp_name from emp c where c.emp_id = a.emp_id)) new_name
  from  t2 a left join t2 b
        on (
                b.emp_id = a.emp_id
            and
                b.rn = a.rn + 1
           )
/

  AUDIT_ID     EMP_ID OLD_NAME                                           NEW_NAME
---------- ---------- -------------------------------------------------- ----------
         1          1 Name1                                              Name2
         2          1 Name2                                              Name3

SQL>

    SY.

  • Need help with sql query involving distinct and County

    I have 2 tables and I want to get the number of specific names. Find the details below. It's hard to explain but I will try to provide as much detail as I can.

    Table A:
    ID of the SR
    1001 1
    1002 2
    2 1003
    1004 3


    Table B:
    Name of the key SrNew
    1 David 1001
    2 James 1002
    3 James 1002
    4 James 1003
    5 James 1004
    6 Mike 1004

    Result: I'm looking:
    Count names such as if the name appears for the same ID of Table A two times, and then only count 1.

    Name of County
    David 1
    James 2 (1002 and 1003 for the same ID (ID #2) so count as 1 for this and then 1 more for 1004 and ID 3)
    1 Mike


    I have following question:
    SELECT distinct (b.Name), a.ID
    FROM TableA, TableB b
    Where a.Sr = b.SrNew Group By b.Name, a.ID

    and as a result I get:
    ID name
    David 1
    James 2
    3 James
    3 Mike


    Now, I want to just the number of each name with the result, but don't know how I can do this with a sql?

    Thanks in advance.

    Who help me?

    SELECT b.Name, count(distinct a.ID)
FROM TableA a, TableB b
Where a.Sr = b.SrNew
Group By b.Name

    Nicolas.

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