SQL & PL/SQL :: How To Write Function To Find Unique Value In Table
Aug 5, 2013
Create a function which will indicate if a given record in a table is unique or not. Unique means the data is occurring only once in the entire table.
Function should be in this signature
function IS_UNIQUE (tableName in varchar2,tableAttribute in varchar2)
return number
.....
begin
//logic to check if given data is unique
return 0; //return 0 if data is unique
else
return 1; //return 1 if data is duplicate
end;
Once I run this query
select attribute1 from table1 where IS_UNIQUE(table1,attribute1)=0
All records of attribute1 which are unique need to be fetched. Similarly, select attribute1 from table1 where IS_UNIQUE(table1,attribute1)=1 should return all records of attribute1 which are duplicates.
I have a table which sees a lot of use for queries
CREATE TABLE CASE_STAGE ( ID NUMBER(9) NOT NULL, STAGE_ID NUMBER(9) NOT NULL, CASE_PHASE_ID NUMBER(9) NOT NULL, "CURRENT" NUMBER(1) NOT NULL, --and other columns )
ID is a primary key CASE_PHASE_ID is a foreign key
"CURRENT" should only ever have values of 0 or 1. When it has a value of 1 it is unique for that CASE_PHASE_ID
What I have tried that doesn't work is
create unique index case_stage_F_IDX1 on case_stage("CURRENT", case_Phase_id) which gives me ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found
What is the correct syntax, something like ("CURRENT"=1,case_phase_id) seems right but fails with an error about a missing bracket. Do I need to use a CASE statement here?
I can' use sequence in the group by function and if I get equivalent analytic for above group by even then I can't write row_number as the order by gives detail record
I don't want to wrap this select inside other select
In literal terms, I'm interested in two fields, I'll call them Field A and Field B. I want to find all situations where a single unique value of Field A has both values Z AND X in Field B (not either or, but both together).
To go into some detail -
I need to make a query that finds ONLY occurrences where one employee id has a certain set of values together (without going into specifics, I'll say PermissionA, PermissionB, PermissionC). I can easily make a query that returns all user id's and all permissions belonging to them, and I can use criteria to filter the results to Permission A B and C only so as to exclude other permissions from getting returned (since there are hundreds),
however my objective is to get ONLY results where the same employee ID has all of those permissions (not just any one or two of the three). However, I don't want to have any criteria that limits the employee ID (I want to search all employee id's, and get a list of those with permissions a and b and c, not just any combination thereof, but all of them). I'm currently able to organize the output using a pivot table by employee id > role,
so that I can easily look at each employee and the roles they have, but I want to undertake a project that will involve searching a much larger number of employees (a # that makes it impractical for me to look through the list, I need to have a query that limits the results to the combinations that I'm looking for, as in this example - permission a b and c together).
create or replace function getDate(p_joing_date Date,p_sysdate) Return Date; IS v_compltd_mnths; BEGIN SELECT into v_compltd_mnths MONTHS_BETWEEN(TO_DATE('sysdate','MM-DD-YYYY'), TO_DATE('joing_date','MM-DD-YYYY') ) "Months"FROM DUAL; return v_compltd_mnths; END;
i need to write a function to eliminate SUNDAY AND SATURDAY;
My criteria is
if My date as (5/19/2012 ) and i want to add 10 days to it themn my function should return 06/01/2012 if My date as (5/13/2012 ) and i want to add 12 days to it themn my function should return 05/29/2012
here is the situation, I have to write a function that receive as parameter a datatype varchar2 and validate if the letter is less than "A" or greater than "Z", it must print do not correct, or correct depending on the situation, no problem so far, the only problem I've got is: If the symbol is ";" is valid, but i do not know how to write it, It does not depend on the PL/SQl languaje but depends on the logic itself.
DECLARE v_nombre varchar2(20):='john;%'; vv varchar2(1); begin for i in 1..length(v_nombre) loop
I have to write function that receives department name and an aggregation operation (average, maximum, minimum) and apply the operation on the salary of employees working on the given department and return the result.
here is my select statement:
select distinct d.deptno, d.deptname, max(e.salary) from employee e join department d on e.deptno=d.deptno where d.deptname=upper('finance') group by d.deptno, d.deptname; [code]...
Can a table conatin composite Alternate key which is not unique for each record in that table i.e combination of these columns have unique values which are repeated for one or more rows in that table.
1) Table emp_perm is a lookup table with 2 columns, temp VARCHAR2 & perm VARCHAR2.
Table emp_perm have below data in it:- temp perm 1064885 0349034 0099982 7399982 6476456 9170346 5252525 52525252)
Now table employee might have following combinations of rows.
Records for both Temps file (1064885) and perm file number (0349034) does exist in employee table, in this case Delete Temp File Number records i.e. 1064885 and keep Permanent File Number (0349034) records as it is.
Records for only temp file number(0099982) does exists and corresponding perm file(7399982) does not exists in employee table in this case convert these records i.e. update 0099982 with its perm file number 7399982 using lookup table emp_perm.
Records for only perm file number exists (9170346) and corresponding temp file number (6476456) does not then do not amend employee table, as we are interested in perm file numbers.
If file number does exist in lookup table in emp_perm and both of them are equal (5252525) then do not amend employee table as temp and per file number are same.
I have to write a trigger on a table which contain lot of parameters.But i need to pick a specific row and check that without disturbing other stuffs.Is there a way to write Before update trigger on a particular rows filtering the unneccasary rows.
The requirement is when user update the date from front end (Java application) the trigger should check the date and validate that it should be month end date. For example.
1)04/21/2012 wrong date 2)04/30/2012 correct date 3)03/29/2012 Wrong date 4)03/31/2012 correct date
I have created a table below, my TL asked me to create a local unique constraint for the below table.
I went through all sites and could not find the correct solution, how to create LOCAL UNIQUE CONSTRAINT ON SUB PARTITION TABLE and LOCAL UNIQUE INDEX ON PARTITION TABLE. Creating Local Unique constraint should take care of creating local unique index creation.
Unique key columns are DET,GDS,ARRIVE_DT
CREATE TABLE SUB_PAR_TAB ( ID VARCHAR2(100) NOT NULL, REGION VARCHAR2(40) NOT NULL, SOURCE VARCHAR2(80) NOT NULL, DET VARCHAR2(80) NOT NULL, GDS VARCHAR2(40) NOT NULL, ARRIVE_DTDATE, SYS_SOURCE VARCHAR2(25) , [code]........
I have a table with a non-unique index consisting of three columns. The first column is not null while the remaining two are nullable. Queries using this index will chiefly be made in two ways.
1. Column one and two having values. Column three is null. 2. Column one and thre having values. Column two is null.
In both cases I expect range scan will be used since it's non-unique. In the first case the scan will be on values in column one and two. But what happens in case two. Will the range be on colum one, column two(being null) and cxolumn three? Or will it be on just column one since the second column is null? I have done some testing. I can see , using EXPLAN PLAN, that range scan is used in both cases. how the index is used?
Is there any other drawbacks with an index like this?
A B ---------- ---------------------------------------- 1 Hello 2 Hello 3 No Hello 4 No Hello 5 Hello 6 Hello 7 Hello
I want to print the output of this table as -->>
A B ---------- ---------------------------------------- 1 2 Hello 3 4 No Hello 5 6 7 Hello
To make it more clear, I just want that whenever the value f column "B" changes then only its value should be printed, else it should be NULL. And if "B" has same value for all the records then the value of "B" should be printed at the last.
Using Oracle 11g, below is the table, partitions, unique and non-unique local index:
CREATE TABLE DOCA( DOCA_ID NUMBER NOT NULL , DOCA_BKG_PAX_ID NUMBER NULL , ROW_PURGE_DATE DATE NULL ,)PARTITION BY RANGE(ROW_PURGE_DATE)INTERVAL(NUMTOYMINTERVAL(1, 'MONTH'))( PARTITION P2007 VALUES LESS THAN (TO_DATE('01/01/2008', 'dd/mm/yyyy')), PARTITION P200801 VALUES LESS THAN (TO_DATE('01/02/2008', 'dd/mm/yyyy')),) TABLESPACE T0; ALTER TABLE DOCA ENABLE ROW MOVEMENT;
CREATE UNIQUE INDEX XPKDOCA ON DOCA( DOCA_ID ASC, ROW_PURGE_DATE ASC)LOCALREVERSE TABLESPACE I0; ALTER TABLE DOCA ADD CONSTRAINT XPKDOCA PRIMARY KEY (DOCA_ID); CREATE INDEX XFKDOCA_DOCA_BKG_PAX_ID ON DOCA( DOCA_BKG_PAX_ID ASC)LOCALREVERSETABLESPACE I0;
I would like to know the difference between the performance of the unique and non-unique local indexes?.
I have set of few hundred reports in Oracle Reports 6i and we have to distinguish them in 3 classes as simple, medium and complex reports. I was wondering what are all the various criterias that should be evaluated to do this .. for example the query behind the report or the layout or graphs complexity etc.
I have to create a function. I need to find the max last logout date for each agent daily. For example, if an agent logged in for the first time at 9:00 and he logged out at 12:00 and he logged in again in 14:00 and he logged out at 15:00 the time I need my report to show is 15:00. How can I do that?In order to make it easiest for you to understand I am sending you this query:
select a.login as login2, To_Char(max(s.endtime), 'dd/MM/yyyy, HH24:MI:SS') as lastLogout from cti.agent a inner join cti.agentsessionlog s on s.agentid = a.agentid and To_Char(s.endtime) != '31-DEC-99 11.59.59.000000 PM' group by a.login;
This query returns the agent's login and the agent's last logout time. It works fine if I enter a date between but I cannot do that. If a use this query as it is and I try to export a report for 31/5 it shows as lastlogout the logout for 01/06 or 2/06. Is there a function I can use? I have a deadline.
I have a query that uses a function to find the business days between two dates.It sums the total number of days between two dates per employee to find the total days for the past 30, 90, or 365 days.
The problem is that the query takes 21 second to return the last 30 days.Over 70 second to return the last 90 days and over 140 second to return the last 365 days.Do you know how I could tune the query to return faster? Below is the query for the last 30 days:
select dwt_emp_id, SUM((SELECT GET_BDAYS(DWT_DATE,DWT_CREATE_DATE) FROM DUAL)) from dwt_dvt_work_time where dwt_create_date > sysdate - 30 and dwt_hours > 4 and dwt_usr_uid_created_by <> -1 group by dwt_emp_id order by dwt_emp_id
Here's the function: CREATE FUNCTION get_bdays (d1 IN DATE, d2 IN DATE) RETURN NUMBER IS total_days NUMBER(11,2); holiday_days NUMBER(11,2); [code]....
I am writing following query SELECT DISTINCT a.list_type_code, a.list_type_name FROM jls_list_type a, jls_list_control b WHERE b.jalsa_srl = :jalsa_srl AND b.list_no != a.list_type_code ORDER BY list_type_code
I just want to display only those records from JLS_LIST_TYPE which is not present in other table JLS_LIST_CONTROL ... for this i wrote above query but it is not working.
I am trying to write a trigger on a new table. (dest_test) This is the first trigger that I have ever attempted (fairly new DBA) and I am having some trouble with the trigger body.It is a before insert trigger that will need to select from another table (dest) for a particular value being inserted (destination).
create table dest_test ( destination varchar2(4) not null, db_name varchar2(10) not null )
desc dest
[code]...
I am getting the exact opposite results than I want, though. If the value appears in dest, it is inserting into dest_test... NOT whatI want it to do!If the value doesn't appear in dest, it is throwing ora-6512 and ora-4088 errors. Is there a way to suppress these errors, or to graceful exit from the block so that the trigger completes without throwing these errors?
I need to write a code which dynamically reads the table name from user_tables (starting with cd) & load the data from remote database which has the same table name & structure based on the load number..
Static PLSQL statement would be :
declare BEGIN INSERT INTO "cd_patient" C-- DYNAMICALLY GET THE TABLE NAME SELECT C1.PAT_MRN -- DYNAMICALLY GET THE COLUMN NAME FROM REMOTE_DB.CD_PATIENT@XXX C1 WHERE C1.LOAD_NUMBER > 2;
I have two design alternatives and need to understand how expensive (speed) is one of them against the other for a medium size table (100K-200K records):
create table xyz ( f1 number not null, f2 varchar2(20) not null, f3 number not null, f4 varchar2(50),
[code]....
the idea is to optimize the design by using a PK instead of the 3 keys and there is a debate that searching a unique index field(2nd scenario) is of the same speed than searching a PK field (1st scenario).
create table revenue ( person varchar2(23), month varchar2(3), rev_amt number )
and i have data in a file like below
Person Jan Feb Mar Apr Mai Jun Jul Aug Sep Oct Nov Dez -------------------------------------------------------- Schnyder,345,223,122,345,324,244,123,123,345,121,345,197 Weber,234,234,123,457,456,287,234,123,678,656,341,567 Keller,596,276,347,134,743,545,216,456,124,753,346,456 Meyer,987,345,645,567,834,567,789,234,678,973,456,125 Holzer,509,154,876,347,146,788,174,986,568,246,324,987 Müller,456,125,678,235,878,237,567,237,788,237,324,778 Binggeli,487,347,458,347,235,864,689,235,764,964,624,347 Stoller,596,237,976,876,346,567,126,879,125,568,124,753 Marty,094,234,235,763,054,567,237,457,325,753,577,346 Studer,784,567,235,753,124,575,864,235,753,864,634,678
i want to load it into the table in the following way.
Person Month Revenue ------------------------- Schnyder Jan 345 Schnyder Feb 223 Schnyder Mar 122 Schnyder Apr 345 Schnyder Mai 324 Schnyder Jun 244 Schnyder Jul 123 Schnyder Aug 123 Schnyder Sep 345 Schnyder Oct 121 Schnyder Nov 345 Schnyder Dez 197 ........ ... ... How to write control file to load this data into the above revenue table.
how to write procedure to load the data into a table using xml as input parameter to a procedure and xml file is as shown below which is input to me.
xml version="1.0"?><DiseaseCodes><Entity><dcode>0</dcode><ddesc>(I87)Other disorders of veins - postphlebitic syndrome</ddesc><claimid>34543></claimid><reauthflag>0</reauthflag></Entity><Entity><dcode>0</dcode><ddesc>(J04)Acute laryngitis and tracheitis</ddesc><claimid>34543></claimid><reauthflag>0</reauthflag></Entity><Entity><dcode>0</dcode><ddesc>(J17*)Pneumonia in other diseases - whooping cough</ddesc><claimid>34543></claimid><reauthflag>0</reauthflag></Entity></DiseaseCodes>.
Trying to learn about Oracle Database Mobile Server.Installed the server, installed the client on WIN 32, created a publication and successfully synchronized.Now need to write a client application for mobile users.
Qs 1) Can I write a simple JSP that reads a table from device SQLITE database?or, the JSP needs to read off a subscrption?If it needs a subscription as the source, then how do I mention it in the JSP?
