PL/SQL :: Select Records Based On First N Distinct Values Of Column
Sep 25, 2012
I need to write a query in plsql to select records for first 3 distinct values of a single column (below example, ID )and all the rows for next 3 distinct values of the column and so on till the end of count of distinct values of a column.
eg:
ID name age
1 abc 10
1 def 20
2 ghi 10
2 jkl 20
2 mno 60
3 pqr 10
4 rst 10
4 tuv 10
5 vwx 10
6 xyz 10
6 hij 10
7 lmn 10
.
.
.
so on... (till some count)
Result should be
Query 1 should result --->
ID name age
1 abc 10
1 def 20
2 ghi 10
2 jkl 20
2 mno 60
3 pqr 10
query 2 should result -->
4 rst 10
4 tuv 10
5 vwx 10
6 xyz 10
6 hij 10
query 3 should result -->
7 lmn 10
.
.
9 .. ..
so on..
I'm trying to select id's in a table that have 2 certain values for another column. Example below explains:
idCoupon Type 123Amount 123Percent 456Amount 789Percent
I would like to write a sql statement that would select all rows where id=123, because id 123 has both coupon types "Amount" and "Percent". So the result set of the sql statement would look like:
I have a data in one table with 6 columns where user may be updating values in all of these 6 columns or he may enter 3 or 4 columns based on that inserts should take place, this is similar to my previous thread , i am using if condition to check column for null if its not null then i will make a insert , but is there any other easier way to do this.
insert into ot_po values ('ss-po',1,ph_sys.nextval); insert into ot_inspect_head values (inh_sys.nextval,'ss-ins',1,'ss-po',1); commit; select * from ot_inspect_item
--Now if the inspection user issues the update statement , it will delete this row --from ot_inspect_item and reinserts the values with values based on --ii_flex_01,ii_flex_02,ii_flex_03 [code]...
basically this view has columns based on the previous tables column ( MEASURE_ID) values and the values will be corresponding value in column Percentage.
My requirement is to concatenate two column values and place them in a new column.I have done it using self join but it limits the purpose,meaning when I have more than 2 values for grouped columns then it won't work.How to make this dynamic,so that for any number of columns grouped,I can concatenate.
SELECT a.co_nm, a.mnfst_nr, a.mnfst_qty, a.mnfst_nr || ':' || a.mnfst_qty || ';' || b.mnfst_nr || ':' || b.mnfst_qty FROM vw_acao_critical a JOIN vw_acao_critical b ON a.co_nm = b.co_nm AND a.mnfst_nr = b.mnfst_nr [code]......
What will be the case when I need to concatenate for more number of values.
like when co_nm has three bahs and manfst_nr and manfst_qty has 3 values for each for bah.and if three are having same_mnfst nr then I should use something dynamic.how to achieve this.
I am trying to come up with a sql select statement that provides all rows for employees with 2 or more cities.
with sample_table as ( select 'John' name,'city' ValueType,'Toronto' Value from dual union all select 'John' name,'city' ValueType,'Vancouver' Value from dual union all select 'Susan' name,'city' ValueType,'Toronto' Value from dual union all select 'Susan' name,'city' ValueType,'Seattle' Value from dual union all select 'Susan' name,'age' ValueType,30 Value from dual union all select 'Susan' name,'city' ValueType,'Atlanta' Value from dual union all
[Code]...
NAME VALUETYPE VALUE ----------- ------------- ------------ John City Toronto John City Vancouver Susan City Toronto Susan City Seattle Susan Age 30 Susan City Atlanta David City Chicago David age 35 David Status married David City Dallas
The above code is just to describe the sample table and the desired result set. Please note that Mary is not on the result set since she has no city assigned to her. Also Julia is not on the result set since she only has one city assigned to her. The others are there because they had at least 2 cities assigned to them.
I need the sql syntax that would return this result set.
is it possible to use the records returned by a query as column names in a select query.
select (select column_name from dba_tab_cols where table_name='V_$DATABASE' and column_name like '%CONTROL%') from v$database; * ERROR at line 1: ORA-01427: single-row subquery returns more than one row
previously i set null constraint to the column and creating some rows and need to change new entering values as not null constraint to the column in oracle without disturbing the old records. how can I do that.
I am reading the above file and need to return the total no. of distinct transaction id from the file . How can i acheive this? In the above case distinct transaction id count is 4
So each Level(L1 ..L4) has zero or many child levels which further has more levels.With out using PL/SQL how can we write a Select query to give me a distinct of all children, all the way to the lowest level (L4).Example: give me all the children where L1 = 3.Result: 31, 32, 33, 311, 322, 333, 3111, 3222, 3333Is it possible to write such a query or am I asking too much logic out of a select and should go with PL/SQL.
Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - 64bit Production PL/SQL Release 11.1.0.6.0 - Production "CORE 11.1.0.6.0 Production"
I have a cursor, whose sql is returning seven rows with these values: 9 4 4 9 7 9 4
i open cursor and fetch these values into variable as shown
OPEN id_search FOR l_sql_stmt; LOOP FETCH id_search INTO l_eve_id; if l_eve_id != l_eve_id_prev then l_eve_id_str := l_eve_id_str || ' , ' ||l_eve_id ; [code].......
but i want only the distinct values in l_eve_id_str , i.e.,
l_eve_id_str := 9,4,7 What this code is doing is creating a string with all the values l_eve_id_str := 9,4,4,9,7,9,4
I've read so many different pages on this topic but I can't seem to get my query the way it needs to be. Here's the query:
select admitnbr, lastname||', '||firstname||' '||finitial, hphone, mobile, wphone, med_rec, dob from patients join schedule using (key_patien) join adtmirro using (key_patien) where appt_state = 'ON HOLD'
Because patients in my database can have multiple appointments "on hold" there are duplicates in the results. I only need 1 record per patient in order to forward this information into an automated dialer to contact that patient. I do NOT want to call the patient over and over again. Once will suffice. I'm trying to make a distinction on the column 'med_rec'. One row per 'med_rec' will be awesome but I can't find a way to create a distinct on that column.
SELECT DISTINCT a.emp_id, a.cal_id, TO_CHAR(a.ts_date, 'DD/MM/YYYY') tsdate, a.ts_date, 1 as days FROM tmsh_timesheet a INNER JOIN project b ON TO_CHAR(b.proj_id) = a.proj_id INNER JOIN tmsh_ts_calendar c ON c.cal_id = a.cal_id INNER JOIN (SELECT a.cal_id, a.emp_id, MAX(a.status) as status, a.create_dt, a.create_by FROM tmsh_stat_hist a
I am trying to update records in the target table based on the records coming in from source. For instance, if the incoming record is present in the target table I would update them in the target else I would simply insert. I have over one million records in my source while my target has 46 million records. The target table is partitioned based on calendar key. I implement this whole logic using Informatica. Looking at the informatica session log I find that the informatica code is perfectly fine but its in the update part it takes long time (more than 5 days to update one million records). find the TARGET TABLE query and the UPDATE query as below.
TARGET TABLE: CREATE TABLE OPERATIONS.DENIAL_REGRET_FACT ( CALENDAR_KEY INTEGER NOT NULL, DAY_TIME_KEY INTEGER NOT NULL, SITE_KEY NUMBER NOT NULL, RESERVATION_AGENT_KEY INTEGER NOT NULL, LOSS_CODE VARCHAR2(30) NOT NULL, PROP_ID VARCHAR2(5) NOT NULL, [code].....
Here the GROUP is changing when the data type is changing and thus for same data type the group shall remain the same As of now this is achieved by - first selecting distinct object_type, then it's mod(rownum,<input variable) and this result of 'mod' is doing the grouping which is the retrieved along with rowid of all individual record
Present query is as following and it is not much efficient
SELECT DO.ROWID RWID, RID FROM DO, ( SELECT OT,CASE MOD(ROWNUM,:v) WHEN 0 THEN :v ELSE MOD(ROWNUM,:v) end as RID FROM( (SELECT DISTINCT OBJECT_TYPE OT
[code]....
I tried using sequence with cycle but it gave different results. Even I tried following but it did not gave satisfactory results
select d.rowid,d.object_type,x.x1 from do d,(select distinct object_type,mod(rownum,:v) x1 from do where created>'01-jan-2008')x where d.object_type=x.object_type and created>'01-jan-2008';
In short the query needs Distinct with mod(rownum) and individual records in a single pass The mod(rownum) i.e. group shall change when the object_type changes but then shall remain constant through out the particular object_type.
