i have a function which takes in two variables and return a varchar.
ex: Function(var1,var2) return as varchar2.
in the function,i query a table for var1 and var2 and concatenate the result set to return a varchar. But if either var1 or var2 is null,then my query in the function fetches the result set for the other variable.
My question is,how would i pass a null value through the function and handle it in the function.
I have a HTML region with two select lists and one button. The select lists are P103_SPORT and P103_YEAR. I want the user to make choices from the select lists and click the button to pass their choices as parameters in a URL. I set the button to redirect to a URL. In that URL I am using the notation &P103_SPORT. and &P103_YEAR. to include the user values. Currently when a user clicks the button, a new window opens with the URL, but nulls are being passed for the 2 items (sport and year). When I click the DEBUG button for the page, these items have nulls for values, even though the user selects values from the select list.
what I'm missing here? Why does DEBUG show null for the items when I can see values in these items?
How to pass null values in OracleCommand as a parameters
i am doing like this
((OracleCommand)cmdMySql).Parameters.Add(":1" ,Varchar2).Value = DBNull.Value;
Its giving error when dataadapter is going to fill.
I have 8 columns. Some of them might be null.I want to display all 8 columns in my result. Not null columns will be first and null at the end.Here is a sample data :
Employee table :
Employee_id Emp_fname emp_lname emp_mname dept salary emp_height emp_weight
1 aaa ddd d1 100 6 180
2 bbb ccc 120 169
3 dfe d2 5.9 223
The expected result is :
result1 result2 result3 result4 result5 result6 result7 result8
1 aaa ddd d1 100 6 180
2 bbb ccc 120 169
3 dfe d2 5.9 223
The function definition in PL/SQL has IN OUT parameter as well as return statement. Using both we can return the values. Basic definition of a function is function can return only one value at a time.
The question is, Can we return a number thru return statement and a char value thru INOUT parameter. Is it possible to return two different values using these?
I am currently studying a Foundation degree in computer software development, and one of my assignment in PL/SQL I am stuck on one of the tasks.
I have to create a procedure where one of the parameters needs to have a default value of one, if no value is entered when the procedure is called. I have trued to use the NVL function which worked when using a anonymous block, but now I have to convert that to a procedure. My problem is I'm getting an error.
The code for the procedure is
CREATE OR REPLACE PROCEDURE add_new_classes
(p_number_of_classes NUMBER := NVL(NULL,1), -- This will enter a default value of 1 if the user does not specify a number
p_course_id classes.course_id%TYPE,
p_period classes.period%TYPE,
p_frequency classes.frequency%TYPE,
[code]....
I then use this to test it
BEGIN
add_new_classes(1002,'first','daily',3002);
END;
and the error I get is
Quote:ORA-06550: line 2, column 4:
PLS-00306: wrong number or types of arguments in call to 'ADD_NEW_CLASSES'
ORA-06550: line 2, column 4:
PL/SQL: Statement ignored
1. BEGIN
2. add_new_classes(1002,'first','daily',3002);
3. END;
When I replace the params manualy with dates in format of:
'27-feb-2011 08:00:00'
I get the real output.
But when I call the function with the TEST button in the PLSQL I don't get any output (Empty table).
Here is the original function (Bad output) and attaching a file with manuly added dates (Good output):
FUNCTION WhatRoomsTaken(dStartTime date, dEndTime date, dEventDate date)
RETURN Genrefcursor IS
Retval Genrefcursor;
BEGIN
open Retval for
[code].....
Why do I need to change in order to get the good output by calling the function with params?
How many OUT parameters can be declared in function header ?
A) None
B) Any Number
C) One for every return declared in the definition
D) Depends on what the RETURN datatype is
what are the parameters expected for app_window.set_window_position() function?
View 4 Replies View RelatedI have an issue with rather complicated function.Basically it is using DBMS_SQL to execute a very long statement with many parameters (~6000 of them) and binding them with DBMS_SQL.BIND_VARIABLE. Variables are called :1,:2,...,:6000.
When this arguments set is too large - I am receiving error "ORA-00939: too many arguments for function".
Currently I am thinking about dividing the query into subqueries and executing them all with performance decrease.
There is a table with column holding 3 NULL values one each in every record. When a count function is applied to the column with a filter on NULLs,it returns 0 instead of 3.
But when count(*)is applied,expected result is returned. Would be interested in knowing about this strange behavior of NULL/Count.
I have 8 columns. Some of them might be null.I want to display all 8 columns in my result. Not null columns will be first and null at the end.
Here is a sample data :
Employee table :
Employee_id Emp_fname emp_lname emp_mname dept salary emp_height emp_weight
1 aaa ddd d1 100 6 180
2 bbb ccc 120 169
3 dfe d2 5.9 223
The expected result is :
result1 result2 result3 result4 result5 result6 result7 result8
1 aaa ddd d1 100 6 180
2 bbb ccc 120 169
3 dfe d2 5.9 223
I have the following query:
select col_1,col_9 from
book_temp b
where b.col_1 is not null
order by to_number(b.col_16)
;
What I want to add is the following:
COL_9
=====
NULL
A
B
NULL
C
D
E
F
NULL
G
I need to connect the NON-NULL rows to the preceding NULL row.
I am running a GROUP BY query on a few columns of enumerated data like:
select count(*), Condition, Size
group by Condition, Size;
COUNT(*) CONDITION SIZE
-------- ---------- --------
3 MINT L
2 FAIR L
4 FAIR M
1 MINT S
Well, let's say I also have a timestamp field in the database. I cannot run a group by with that involved because the time is recorded to the milisec and is unique for every record. Instead, I want to include this in my group by function based on whether or not it is NULL.
For example:
COUNT(*) CONDITION SIZE SOLDDATE
-------- ---------- -------- ----------
3 MINT L ISNULL
2 FAIR L NOTNULL
2 FAIR M NOTNULL
2 FAIR M ISNULL
1 MINT S ISNULL
I have a table which has a not null column. the column is date field. I am trying to change it to Null. But it is giving a error.
I am using below query.
ALTER TABLE T_test
modify (paid_to_date null)
create table test
(
id int ,
dat date
)
/
I want to implement a business rule such as we have for each id at most 1 dat null. So, I've created this unique index on test.
create unique index x_only_one_dat_cess_null on test(id, case when dat_cess is null then 'NULL' else to_char(dat_cess, 'dd/mm/yyyy') end);
insert into test values (1, sysdate);
insert into test values (1, sysdate - 1);
insert into test values (1, null);
insert into test values (1, null);
-- -----
insert into test values (2, sysdate);
insert into test values (2, sysdate - 1);
insert into test values (2, null);
The 4th insert will cause an error and this is what I wanted to implement. OK. Now the problem is that for non-null values of dat, we can't have data like this
iddat
------------
124/10/2013
123/10/2013
123/10/2013
1
because of the unique index (the 2nd and the 3rd row are equal). So just for learning purposes, how could we allow at most one null value of dat and allow duplicates for non-null values of dat.
when i follow this steps mention on this website
[URL].........
to modify column from null to not null i got this error and on this website its show successful
my steps are
first i create a table
SQL> create table Stu_Table(Stu_Id varchar(2), Stu_Name varchar(10),
2 Stu_Class varchar(10));
Table created.
Then insert some rows into Stu_Table
SQL> insert into Stu_Table (Stu_Id, Stu_Name) values(1,'Komal');
1 row created.
SQL> insert into Stu_Table (Stu_Id, Stu_Name) values(2,'Ajay');
1 row created.
SQL> insert into Stu_Table (Stu_Id, Stu_Name) values(3,'Rakesh');
1 row created.
SQL> insert into Stu_Table (Stu_Id, Stu_Name) values(4,'Bhanu');
1 row created.
SQL> insert into Stu_Table (Stu_Id, Stu_Name) values(5,'Santosh');
1 row created.
SQL> select * from Stu_Table;
ST STU_NAME STU_CLASS
-- ---------- ----------
1 Komal
2 Ajay
3 Rakesh
4 Bhanu
5 Santosh
Table Structure is like this
SQL> Describe Stu_Table
Name Null? Type
----------------------------------------- -------- ----------------------------
STU_ID VARCHAR2(2)
STU_NAME VARCHAR2(10)
STU_CLASS VARCHAR2(10)
now when i try to modify this Stu_id column to not null its give me error.
SQL>ALTER TABLE Stu_Table MODIFY Stu_Id int(3)not null;
ALTER TABLE Stu_Table MODIFY Stu_Id int(3)not null
*
ERROR at line 1:
ORA-01735: invalid ALTER TABLE option
and when i try to add new column with not null its also gives me error
SQL> ALTER TABLE Stu_Table add C1_TEMP integer NOT NULL;
ALTER TABLE Stu_Table add C1_TEMP integer NOT NULL
*
ERROR at line 1:
ORA-01758: table must be empty to add mandatory (NOT NULL) column
Initially i have inserted the data into table like
Date xxx yyyy
1/1/12 1 1
2/1/12 null null
3/1/12 null null
4/1/12 1 1
5/1/12 1 1
6/1/12 null null
in above example data is null for some date here my requirement is how can i copy before not null data(1/1/12) to *2/1/12, 3/1/12* .
Suppose that, I have two tables: emp, dept
emp records the empid, emp_name, deptid
dept records the deptid, dept_name
Here is a record, it's a president or some special position in company, so it's deptid is set to NULL. Here comes the question, how can I print all the emp_name with their deptartment name?
I know how to print all the emp_name with their department name if they have dept_id, but is that possible that I merge the record with dept_id NULL?
Is anyway to create function based index for group function columns.
For example
select max(timestamp),min(age),averge(sal).... ... .. from tab;
I have the following C code:
class Factorial {
public:
int getVal (int a);
};
[code]....
/When I am trying to execute this function always get the ORA-06521. I changed the data types - but nothing changed.
Just in case, listener.ora
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = db)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
[code]....
What is the Difference between a Stand Alone Function/Procedure & a Function/Procedure declared in a Package.
View 2 Replies View RelatedWhat is advantage of Deterministic function over normal function?
What is the diff B/W Deterministic function and normal function and also give me a example in which scenario we use Deterministic function?
Oracle Version:11.2.0.3/ OEL 6.1
For diagnosing a performance issue related to a batch run, our application teams wants to know all session/system level parameter that affects SQL performance. I can't simply give an output of v$parameter.name and v$parameter.
value as there will lots of parameter not related SQL performance like
diagnostic_destlog_archive_dest_1deferred_segment_creationcontrol_filesbackground_core_dump
I am looking for only those parameters which are relevant to SQL performance, like
optimizer_modestatistics_levelmemory_targetsga_target
How can you use pivot with a parameter? If you attempt to use a parameter then an ORA-500: bind variable not supported is given
Below is a simplified version of the sql to illustrate teh problem.
create table test_pivot
(
ord_no number,
qty number,
loc varchar2(10)
):
insert into test_pivot values (123, 3, 'LOC1');
insert into test_pivot values (123, 2, 'LOC1');
insert into test_pivot values (234, 4, 'LOC1');
insert into test_pivot values (234, 5, 'LOC1');
-- this one is fine
Select * From
(
Select Ord_No, Qty, Loc
From Test_Pivot
Where Ord_No In ('123', '234')
)
Pivot (Sum(Qty) For Ord_No In ('123', '234') )
-- how to use pivot with parameters
Select * From
(
Select Ord_No, Qty, Loc
From Test_Pivot
Where Ord_No In (:Ord1, :Ord2)
)
Pivot (Sum(Qty) For Ord_No In (:Ord1, :Ord2) )
the same query i put below but in oracle.
I'm trying to declare and set parameters in oracle
I'm trying to do something similar as the follow SQL Server Sentence:
------------------------------------------------------
DECLARE
@Year SMALLINT,
@City varchar(255)
SET @Year = 2010
SET @City = ''NY','NJ''
[Code]....
I want to ask that how can I use parameters in forms? I have created 2 parameter pm_rollnum and pm_classname but I don't that how I use it in form that when end user enter its value in these parameter result should be open.
View 6 Replies View RelatedI just upgraded my version of my oracle from 9 to 11.2g.When I tried to execute some queries in PL/SQL i keep getting an
annoying error : "ORA-01843 not a valid month."
I realized that if I execute the following query:alter session set NLS_DATE_LANGUAGE=AMERICAN;before every query that I want to execute, then it's executed fine.
I preformed the next queries:
1. select * from nls_database_parameters;
2. select * from nls_instance_parameters;
3. select * from nls_session_parameters;
and I saw that the fields in the "nls_session_parameters" vieware not derived from "nls_database_parameters" "nls_instance_parameters".
How can I derive the parameters from the instancedatabase view into the session view?I want that the "nls_date_language" parameter will always be 'AMERICAN'.
How to how to get this sql to work?
select a.in_house_ref
from media_item a
where
((&rack is null) or a.in_house_ref in (&rack));
--a.house_media in ('CH127600','BF101042'), example values
I've tried the a.in_house_ref in (:rack) by itself and that doesn't work for the values above and hence changed it to (&rack) and that works. The issue I run into now is that the the paramater can be null, ie., no values need be entered by users and hence I put the is null statement. When I run the full statement above, oracle returns an error, i.e. , ORA-00936: missing expression.
what is the purpose of kernel parameter while creating database.
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