SQL & PL/SQL :: Distinct With Order By Clause?

Mar 13, 2012

I have got the following error while executing below Query.

ORA-01791 'Not a SELECTed expression'

select distinct sgbstdn_levl_code
from sgbstdn,spriden
where spriden_pidm = sgbstdn_pidm
and spriden_id = '200076543'
order by sgbstdn_term_code_eff desc;

The above Query is not working with Distinct & Order By clause are present and by joining two tables. I need the distinct values of levels in Descending order of Terms.

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SQL & PL/SQL :: Why Does SELECT DISTINCT Return Different Rows When Used With ORDER BY

Jan 4, 2013

nex lines showing SELECT DISTINCT return different rows when used with ORDER BY.

CREATE TABLE M1( ID_ NUMBER, A NUMBER, B NUMBER);
CREATE TABLE V1 ( A NUMBER, B2 NUMBER);
DELETE FROM M1;
DELETE FROM V1;
INSERT INTO M1 (ID_, A,B) VALUES (107, 5,1);
INSERT INTO M1 (ID_, A,B) VALUES (108, 11,1);
INSERT INTO M1 (ID_, A,B) VALUES (109, 17,1);

[code]....

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SQL & PL/SQL :: To_char Function In Combination With Distinct Clause - ORA-00936 / Missing Expression

Mar 2, 2012

I have a very simple table with 2 columsn. As_of_date is one of the column. This column is "Date" data type.

When I use distinct clause inside a to_char function it gives the following error:

ORA-00936: missing expression
00936. 00000 - "missing expression"

The Sql is

select to_char(distinct(as_of_date),'mm-dd-yyyy') from sales

I can't see any syntax error in the sql..but forsome reason, it doesn't work.

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SQL & PL/SQL :: Order By Clause?

Mar 12, 2013

I have requirement to create an XML structure through stored procedure. I need to Order some of the columns in ascending order before I format them into the xml structure. I am pretty novice to creating an output into XML format, but attached is the query I came up with (without order by). This works perfect, but now the requirement is to order by - cls_cd, and within cls_cd, again order by - cat_cd. I am not able to do this.

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PL/SQL :: First Clause With Order By

Apr 29, 2013

I have a requirement where I need to display a list of employees, performance rating and manager id. I want to display the employees first whose manager is as manager_id as input parameter. So lets say a manager logs in, he should see his reporters first and then the rest. How can I implement this in SQL? I am trying first clause with order by but not sure how to do that here.

procedure
display_list(manager_id in varchar2)

Output is:
emp_id
manager_id
performance_rating

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SQL & PL/SQL :: Results Different After Using Order By Clause

Mar 18, 2011

Result are different after adding the Order By clause in below query.

Query

select sum(wpsv1.primary_qty) detail_qty,
wpsv1.from_subinventory subinventory,
wdd.revision revision,

[Code]....

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SQL & PL/SQL :: Significance Of Order By Clause?

Nov 4, 2012

I know that order by clause in normal query is used to order the result set based on the key. significance of order by clause in analytical functions.

with data as
(select empno,
sal,
case

[Code]...

In case of min, max analytical functions order by clause have importance. But how it will work for a COUNT function ?

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PL/SQL :: Unpivot Using Order By Clause

May 15, 2013

explain the difference in the VALUE column when DESCRIPTION = 'dept' when the query is run with and without the order by clause.

SELECT * FROM
(
SELECT * FROM emp
--ORDER BY job
)UNPIVOT (VALUE FOR DESCRIPTION IN (sal AS 'salary', deptno AS 'dept'));

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SQL & PL/SQL :: ORDER BY Clause And ROWNUM

Apr 4, 2010

When i try to execute a query, which is organised as the below example, it retrieves data..

select * from (
select col1, col2, col3, col4....coln
from TABLE_ONE left outer join TABLE_TWO
-- some conditions and group by clause
order by 1 asc
)
where rownum <=1000;

Again if I use Column alias in the ORDER BY clause col1, the query won't retrieve data.

Also If I use ORDER BY 4 instead of ORDER BY 1, the query wont return data...

select * from (
select col1, col2, col3, col4....coln
from TABLE_ONE left outer join TABLE_TWO
-- some conditions and group by clause
order by 4 asc
)
where rownum <=1000;

The whole issue revolves around the inner ORDER BY Clause and external ROWNUM condition..If I eliminate any of the two, the query works fine...I am not sure if indexes have some role to play in it...

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SQL & PL/SQL :: Query Gets Slower By Adding Order By Clause

Apr 14, 2010

I have a query, running the query with order by and without orderby clasue casues big performance difference.

here without order by it takes 5 sec
.
SELECT
audit_number,
formatted_audit_number,
ag.sys_audit_id,
audit_begin_date,
audit_end_date,

[Code]....

here with order by it takes 2 min

SELECT
audit_number,
formatted_audit_number,
ag.sys_audit_id,
audit_begin_date,
audit_end_date,
auditee_name,
ein,

[Code]....

I have like 10,000 records.

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PL/SQL :: Order By In Union Clause In Date Column

Nov 3, 2012

Oracle version : 11.2.0.2 Linux EL6 server

I have a query like below:

select col1, col2, col3, col4
from tab1, tab2, tab3
where conditions
union

[Code]...

Now, the col4 is a date column and I have to order by the entire result sets on it. I know I can do it by (order by col4) or by (order by 4) at the end of the entire query.

But the problem is that, the output is coming in dd-Mon-yyyy (i.e 31-Nov-2012).

I want every output in dd/mm/yyyy format so I need to use to_char function.

But in that case, I cant use the order by clause, because in that case it is getting arranged by character i.e by 1,2,3,4,5 like this.

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SQL & PL/SQL :: View Not Having ORDER BY Clause In SELECT Statement?

Jun 13, 2010

currently i m going through some dumps for my OCA-11g prep.I came across one sentence :A view cannot have an ORDER BY clause in the SELECT statement.well this statement is false and the explanation given was :

Query operations containing ORDER BY clause are also permitted, so long as the ORDER BY clause appears outside the parentheses.

The following is an example of what I mean: CREATE VIEW my_view AS (SELECT*FROM emp) ORDER BYempno.

but when i tried running the query like this :CREATE VIEW my_view AS SELECT*FROM emp ORDER BYempno ,it worked w/o giving parentheses.

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Forms :: Data Block Ignoring Order By Clause?

Mar 6, 2012

I have a real problem with form, specifically one of its data blocks. In the order by property of the block i specify it to sort on a branch in ascending order(i tried descending as well) but for some reason the form ignores that and sorts it on the ROWNUM. I even removed the where clause, the order by clause and changed the query data source type to FROM clause and changed the data source name to pre-query. I then created the query string in the block's pre-query trigger and set query_data_source_name property to that query string and still the data in the block is not being sorted on the branch number but instead on the ROWNUM.

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Performance Tuning :: How To Tune Order By Clause Without Changing Sort Area

May 1, 2008

How to avoid sort operation by an order by clause without changing the sort area size.what hints or changes should be done in query so that order by clause work faster.

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Performance Tuning :: Index Usage In Order By Clause On Nullable Column

Jan 28, 2011

I came across situation where a Nullable column is not using index for 'order by' clause. I added Not Null condition in the 'where' condition but it wasn't useful. I don't wanted to make composite index with not nullable column or with constant or modify column to 'Not Null'

So I carried out test cases and during which I found that in one case the sql statement does 'fast full scan' for data access but does not use index for 'order by' sorting

here are the steps

Initially I kept the column Nullable

SQL> create sequence s5;
Sequence created.

SQL> create table t5 as select s5.nextval id,a.* from dba_objects a where rownum<1001;
Table created.

SQL> set pages 100
SQL> select column_name,nullable from user_tab_columns where table_name='T5';

SQL> create index i5 on t5(id);
Index created.

SQL> exec dbms_stats.gather_table_stats(user,'T5',cascade=>true);
PL/SQL procedure successfully completed.
exit

SQL> alter session set events '10046 trace name context forever, level 12';

select *
from
t5 where id is not null order by id

call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 68 0.00 0.00 0 16 0 1000
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 70 0.01 0.00 0 16 0 1000

Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 5

Rows Row Source Operation
------- ---------------------------------------------------
1000 SORT ORDER BY (cr=16 pr=0 pw=0 time=4771 us)
1000 TABLE ACCESS FULL T5 (cr=16 pr=0 pw=0 time=1157 us)

Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 68 0.00 0.00
SQL*Net message from client 68 49.49 49.72
********************************************************************************

select /*+ index(t i5) */ *
from
t5 t where id is not null order by id

call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 68 0.00 0.00 0 150 0 1000
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 70 0.00 0.00 0 150 0 1000

Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 5

Rows Row Source Operation
------- ---------------------------------------------------
1000 TABLE ACCESS BY INDEX ROWID T5 (cr=150 pr=0 pw=0 time=5167 us)
1000 INDEX FULL SCAN I5 (cr=71 pr=0 pw=0 time=3141 us)(object id 4673065)

Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 69 0.00 0.00
SQL*Net message from client 69 22.89 28.04

Now I modified the 'id' column to Not Null

SQL> alter table t5 modify id not null;

SQL> set pages 100
SQL> select column_name,nullable from user_tab_columns where table_name='T5';

COLUMN_NAME N
------------------------------ -
ID N
OWNER Y
OBJECT_NAME Y
SUBOBJECT_NAME Y
OBJECT_ID Y
DATA_OBJECT_ID Y
OBJECT_TYPE Y
CREATED Y
LAST_DDL_TIME Y
TIMESTAMP Y
STATUS Y
TEMPORARY Y
GENERATED Y
SECONDARY Y

14 rows selected.

select *
from
t5 order by id

call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.01 0 29 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 68 0.00 0.00 0 16 0 1000
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 70 0.01 0.01 0 45 0 1000

Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 5

Rows Row Source Operation
------- ---------------------------------------------------
1000 SORT ORDER BY (cr=16 pr=0 pw=0 time=2398 us)
1000 TABLE ACCESS FULL T5 (cr=16 pr=0 pw=0 time=1152 us)

Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 68 0.00 0.00
SQL*Net message from client 68 37.74 37.91
********************************************************************************

select /*+ index(t i5) */ *
from
t5 t order by id

call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 68 0.00 0.00 0 150 0 1000
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 70 0.00 0.00 0 150 0 1000

Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 5

Rows Row Source Operation
------- ---------------------------------------------------
1000 TABLE ACCESS BY INDEX ROWID T5 (cr=150 pr=0 pw=0 time=4166 us)
1000 INDEX FULL SCAN I5 (cr=71 pr=0 pw=0 time=3142 us)(object id 4673065)

Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 68 0.00 0.00
SQL*Net message from client 68 8.28 8.45

select id
from
t5 order by id

call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 68 0.00 0.00 0 6 0 1000
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 70 0.00 0.00 0 6 0 1000

Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 5

Rows Row Source Operation
------- ---------------------------------------------------
1000 SORT ORDER BY (cr=6 pr=0 pw=0 time=1342 us)
1000 INDEX FAST FULL SCAN I5 (cr=6 pr=0 pw=0 time=1093 us)(object id 4673065)

Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 68 0.00 0.00
SQL*Net message from client 68 1.88 1.89

Questions are

1) Why adding 'where id is not null wasn't enough for the index to get used in 'order by'?
2) While we got 'fast full scan' why index wasn't used for 'order by' clause?
3) Do we need the indexed column in where clause for being used in 'order by clause' too?
4) Do we need 'order by' clause if we are selecting only the indexed column with sequence generated values?

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Retrieve Distinct Values From Clob Using Distinct Operator

May 27, 2013

i have a table with a clob column and i have 150 records i want retrieve distinct values from the clob using distinct operator on clob will not work

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Performance Tuning :: Order Of Steps In Execution Path And Order Of Predicates In The Plan

Mar 20, 2012

Which step in the following plan is the first step of execution

I reckon it is "TABLE ACCESS BY INDEX ROWID| BANK_BATCH_STATE"

Is that correct?

In the "Predicate Information (identified by operation id):"

section the predicates - access and filter for the step "TABLE ACCESS FULL | PYMNT_DUES" are displayed first

Isn't there any relation between the order of execution steps and the order in which predicates are displayed?

Execution Plan
----------------------------------------------------------
Plan hash value: 538700484
-------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 2364 | 15 (14)| 00:00:01 |
|* 1 | FILTER | | | | | |
| 2 | HASH GROUP BY | | 1 | 2364 | 15 (14)| 00:00:01 |
| 3 | NESTED LOOPS | | 1 | 2364 | 14 (8)| 00:00:01 |
| 4 | NESTED LOOPS | | 1 | 2313 | 13 (8)| 00:00:01 |
| 5 | NESTED LOOPS | | 1 | 2281 | 12 (9)| 00:00:01 |
| 6 | NESTED LOOPS OUTER | | 1 | 2255 | 11 (10)| 00:00:01 |
|* 7 | HASH JOIN | | 1 | 175 | 6 (17)| 00:00:01 |
|* 8 | INDEX RANGE SCAN | INDX_2 | 12 | 612 | 2 (0)| 00:00:01 |
|* 9 | TABLE ACCESS FULL | PYMNT_DUES | 43 | 5332 | 3 (0)| 00:00:01 |
| 10 | VIEW PUSHED PREDICATE | | 1 | 2080 | 5 (0)| 00:00:01 |
| 11 | NESTED LOOPS | | 1 | 154 | 5 (0)| 00:00:01 |
| 12 | NESTED LOOPS | | 1 | 103 | 4 (0)| 00:00:01 |
|* 13 | TABLE ACCESS BY INDEX ROWID| BANK_BATCH_STATE | 1 | 32 | 2 (0)| 00:00:01 |
|* 14 | INDEX RANGE SCAN | INDX_BBS_1 | 3 | | 1 (0)| 00:00:01 |
|* 15 | TABLE ACCESS BY INDEX ROWID| DAILY_CHECK | 1 | 71 | 2 (0)| 00:00:01 |
|* 16 | INDEX RANGE SCAN | INDX_SEARCH | 1 | | 1 (0)| 00:00:01 |
|* 17 | INDEX RANGE SCAN | INDX_2 | 1 | 51 | 1 (0)| 00:00:01 |
|* 18 | INDEX RANGE SCAN | INDX_IAM_SR_NO | 1 | 26 | 1 (0)| 00:00:01 |
|* 19 | INDEX RANGE SCAN | INDX_2 | 1 | 32 | 1 (0)| 00:00:01 |
|* 20 | INDEX RANGE SCAN | INDX_2 | 1 | 51 | 1 (0)| 00:00:01 |
-----------------------------------------------------------------

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SQL & PL/SQL :: Result Order In 2 Table Joins Without Order By

Sep 6, 2011

I have below tables,

describe rpthead

Name Null Type
--------------------------- -------- -------------
RPTNO NOT NULL NUMBER
RPTDATE NOT NULL DATE
RPTD_BY NOT NULL VARCHAR2(25)
PRODUCT_ID NOT NULL NUMBER

describe rptbody

Name Null Type
------------- -------- -------------
RPTNO NOT NULL NUMBER
LINENO NOT NULL NUMBER
COMMENTS VARCHAR2(240)
UPD_DATE DATE

The fact is that we store some header in RPTHEAD and store real data in RPTBODY, the question is that if I use below SQL to query all data for a 'PRODUCT_ID'.

SELECT t0.LINENO, t0.COMMENTS, t0.RPTNO, t0.UPD_DATE
FROM RPTBODY t0 , RPTHEAD rpthead
WHERE
(
t0.RPTNO = rpthead.RPTNO
AND
t0.UPD_DATE>=to_date('1970/01/01 00:00:00','YYYY/MM/DD hh24:mi:ss')
AND
rpthead.PRODUCT_ID IN ('4647')
)

I do not want to have 'ORDER by' clause since data set is too large, the sorting takes long time, is there any way to get the result rows in the order sorted by RPTNO? We have the index for RPTNO on RPTBODY.

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SQL & PL/SQL :: OrderBy Clause Before From Clause?

Apr 23, 2010

can we use something like this

"select ... order by emp from emp"

what is to be done? so that this qurey runs. no co-related subquery to be used.

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Oct 7, 2010

I have a function which returns a preformatted SQL but with duplicates as follows

FSI
..FSIL
..FSIL
....IS123
....IS123
....IS345
....IS345
....IS547
....IS547
..FSIR
..FSIR
....IS98777
....IS98777
....IS34567
....IS34567
....IS67799
....IS67799

I have to eliminate the above result set without changing the order. a distinct on the function returns a jumbled result set.

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SQL & PL/SQL :: Distinct Value From VARRAY?

Feb 21, 2012

I need to take the distinct values from VARRAY.. I have wrote following simple example. But it does not work. how to get the distinct value from VARRAY.

declare
type t is varray(10) of varchar2(10);
t1 t;
type r is table of varchar2(10) index by binary_integer;
r1 r;
begin
t1 := t('A','B','A','B','A','B','C');
select distinct * into r1 from table(select * from t1);
END;

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SQL & PL/SQL :: Select Just 1 Row For Each Distinct Column Value?

Feb 16, 2011

i need a Select * from tablename just 1 Row for each distinct ActionMode column value

CREATE TABLE INSTRUCTIONAUDITLOGSS
(
TNUM NUMBER(10) PK NOT NULL,
BATCHTNUM NUMBER(10),
ENTRYTYPE VARCHAR2(8 BYTE),
USERGROUP VARCHAR2(8 BYTE),
USERID VARCHAR2(8 BYTE),
PRODUCT VARCHAR2(8 BYTE),

[code]...

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SQL & PL/SQL :: Getting DISTINCT Count From Two Different Columns?

Feb 1, 2012

I have following query which gives currency code from two different tables. I would like to get the distinct count of currency codes from these two different columns.

SELECT eb.person_seq_id, eb.bonus_amount, eb.currency_cd, ed.currency_cd_host
FROM fr_emp_bonuses eb, fr_emp_details ed, fr_periods p
WHERE eb.person_seq_id = ed.person_seq_id AND ed.period_seq_id = eb.period_seq_id
AND ed.period_seq_id = p.period_seq_id AND p.period_status = 'CURRENT'
AND eb.bonus_amount >= 0 AND eb.person_seq_id = 3525125;

This query gives following result

3525125240000USDINR
35251250 USDINR
352512560000 USDINR
352512550000 USDINR

There are two distinct currency codes (USD, INR) and total amount is 350000. So I am looking for a query to give me the following result

3525125350000 2

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SQL & PL/SQL :: Use Distinct For Multiple Fields?

Oct 18, 2011

i have a query in this way

select field1,field2,field3 from Table1
union
select field1,field2,field3 from table2

In the query from table2 i am getting duplicate rows, HOW can i retrieve only distinct rows...Using distinct keyword did not work...if i have to post create and insert statements for this one...

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SQL & PL/SQL :: Distinct Values In A Column?

Jul 18, 2013

I have a table with two columns, like:

123 xxx
456 xxx
789 yyy
987 yyy

And in the output I would like to have:

123 xxx
789 yyy

I tried with distinct and unique on the second column, but it doesn't work.

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SQL & PL/SQL :: Multi Column Distinct

Sep 16, 2010

I need to select multiple columns but only have 2 of them which are distinct. For instance if i have

userid lastname firstname city country time
1 jones tom lon gb 2:25
2 wall paul la usa 2:30
1 jones tom lon gb 2:50
3 smith jane ny usa 2:55

what i would want to do is select all the columns but avoid duplicate lastname-firstname combination rows. The problem is if i use a group by i have to include all the columns and because time is different i will get tom jones twice. a way of getting round this so i can select all the columns but only 1 row of tom jones.

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SQL & PL/SQL :: How To Retrieve Distinct Cat_id

Nov 1, 2011

Category Table
Name Null? Type
------------------------- -------- --------------
CAT_ID NOT NULL NUMBER
CAT_NAME VARCHAR2(20)

Qusestion Table
Name Null? Type
--------------------------- -------- -------
QUS_PK NOT NULL NUMBER
CREATED_DATE DATE
VIEW_COUNT NUMBER
CAT_ID NUMBER

select category.cat_id , qus_pk , cat_name , created_date , view_count
from category , qusestion
where category.cat_id = qusestion.cat_id
order by view_count desc

How can I retrieve distinct cat_id here?

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SQL & PL/SQL :: Distinct With Orderby In Subquery

Mar 31, 2010

The table creation and Data insertion script is attached with the message.Basically I want to sort all the data based on the order by clause and then remove duplicates from the TSKID column and get distinct TSKIDs in the same order.I have below query to sort data:

SELECT *
FROM piwingetworkitems_vd
ORDER BY profilepriority,
authdptpriority,
returnpriority ASC,
priority DESC,
effdate,
tskid

But when I add a DISTINCT to the query, it does some kind of random sort and doesn't return the data as per above ORDER BY query and ignoring the SORT order.

SELECT DISTINCT tskid
FROM (SELECT *
FROM piwingetworkitems_vd
ORDER BY profilepriority,
authdptpriority,
returnpriority ASC,
priority DESC,
effdate,
tskid)

Is there any way to select the DISTINCT taskids ordered as per requirements?

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SQL & PL/SQL :: Distinct Timestamp - One Entry Per Day?

Apr 21, 2010

how can I distinct this query to get just one entry for one day.

this query:

select to_date(to_char(TIMESTAMP, 'YYYY-MON-DD HH24.MI.SS'), 'YYYY-MON-DD HH24.MI.SS') datum from event_table where id=15 ORDER by timestamp

returns:
Datum
01-MAY-09
01-MAY-09
01-MAY-09
..
..
..
02-MAY-09
02-MAY-09
.
.

but i want to have:

Datum
01-MAY-09
02-MAY-09
03-MAY-09
.
.

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Sep 4, 2012

select * from a (6 column)
where wallet='01710000273'
select * from b (2 column)
where wallet='01710000273'

when I union these two tables it find two row for similar wallet, but i want to show these in one row. How will possible this?

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