SQL & PL/SQL :: Select Null Value
Feb 18, 2011I have a sql queries in that i saw one sql querie like this
select columnname,null columnname from tablename
what is the meaning of this which i marked with red (null columanmea)
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SQL & PL/SQL :: Function In Oracle To Select Not-null Columns At Beginning And Null Columns At End?
Jul 12, 2012I 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
Select Only Non-null Columns?
Sep 19, 2006I have a table containing hundreds of columns and I would like to be able to qualify my select statements so that only those columns containing a value are returned. Something like:
Select (non null columns) from tablename where columnX = 'whatever'
Select Into With Null Values?
Apr 20, 2007i have a stored proc where i am selecting a value into a variable like so:
SELECT FUNCTION
INTO V_FUNCTION
FROM FUNCTION_TABLE
WHERE FUNCTION = P_INPUT;
Now, my problem lies in where there is no value returned (oracle will throw an error).
SQL & PL/SQL :: Select NULL Using REGEXP_SUBSTR?
Feb 2, 2011My Database is in Oracle 11g.
My query returns the 3rd field from a CSV string. If the third field in the string is empty I want the select to return a null but it returns the 4th field :
SELECT REGEXP_SUBSTR( 'A,B,,D,E','[^,]+',1,3) from dual;
.. this returns 'D'.
Can we somehow make the REGEX_SUBSTR return a NULL for the third field ?
SQL & PL/SQL :: Add Null In Select Based On Certain Condition?
Oct 20, 2011I got a requirement to check if a particular range of values are present , if few values missing then have to add null for the values. This has to be a SQL statement.
table 1 :
fiscal_month_id, value1, value2
2010100028482848
2010110025712709.5
2010120027452721.3
2011010026052692.25
2011020026382681.4
2011030030992751
2011040027662753.14
2011050029732780.625
This is the table. the fiscal month id denotes that the values is from month Oct(20101000) to May (20110500). The fiscal year cycle for me is from OCT to SEP. Hence when we select this table, the select should retreive the below data
fiscal_month_id, value1, value2
2010100028482848
2010110025712709.5
2010120027452721.3
2011010026052692.25
[code].....
How to do this in a select statement ?
This fiscal_month_ID is actual from another table where all time level information are kept.
PL/SQL :: Have A Function In Oracle To Select Not Null Columns At Beginning
Jul 12, 2012I 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
SQL & PL/SQL :: Invalid Results When Including Date With Null Value In Select List?
Jun 15, 2010I'm working on a Oracle Database, and I'm gettin incorrect results when including a date field in the select list which is NULL in the table.
This works correctly and returns exactly one row:
SELECT firstField FROM table WHERE firstField = 'value'
while this doesn't and returns no rows:
SELECT firstField, secondField FROM table WHERE firstField = 'value'
Where secondField is of type date and its value is NULL (00-000-00). Note that the only thing that changes is the select list.
SQL & PL/SQL :: Hierarchical Query - Connect NON-NULL Rows To Preceding NULL Row
Aug 29, 2012I 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.
SQL & PL/SQL :: Counting NULL Vs NON-NULL In A GROUP BY Clause
Jun 21, 2010I 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
SQL & PL/SQL :: Date Field - Not Null Column To NULL
Mar 16, 2011I 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)
SQL & PL/SQL :: Unique Null And Multiple Non-null
Oct 24, 2013create 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.
SQL & PL/SQL :: How To Modify Null Column To Not Null
Jan 9, 2012when 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
PL/SQL :: How To Update Null Data With Previous Not Null Data
Oct 25, 2012Initially 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* .
SQL & PL/SQL :: Print NULL Entry Along With NOT NULL Entry
May 30, 2010Suppose 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?
SQL & PL/SQL :: Select First 40 Columns Without Giving All Column Names In Select Clause?
Mar 3, 2011I have a table with around 80 columns. All i need is to select first 40 columns.
Is there any way to select first 40 columns without giving all the 40 Column Names in select clause.
SQL & PL/SQL :: Select Dynamic Column Names In Select Statement In Function?
Jul 4, 2010i want to select dynamic column names in my select statement in my function.
View 4 Replies View RelatedApplication Express :: How To Select MIN Value Under Default Tag Of Select List
Oct 5, 2012I M USING APEX 4.1 AND CREATED SELECT LIST ON PAGE, I WANT TO SHOW MIN VALUE OF THE SELECT LIST FOR THAT I WROTE IN THAT SELECT LIST PROPERTIES UNDER DEFAULT TAG MIN; AND CHOOSE PL/SQL EXPRESSION BUT ITS GIVING ERROR "Error computing item default value for page item P1_PRODUCT."
BUT IF I HARDCORE THE VALUE CONTAINING IN MY DATA LIKE PRODUCT ID = 1, I HARDCODED IN DEFAULT VALUE 1 AND SELECT PL/SQL EXPRESSION IT WORKS.
BUT ITS NOT DONE LIKE THIS I WANT TO SELECT BY DEFAULT MIN VALUE OF THE SELECT LIST, SO THAT THE DATA SHOULD BE DISPLAYED ACCORDING TO THAT.
THE EXACT REQUIREMENT IS TO ENTER THE SELECT LIST DEFAULT VALUE IN SESSION SO THAT DATA IS TO BE DISPLAYED.
SQL & PL/SQL :: Why Blind Select Is Better Than Conditional Select Statement
Dec 29, 2010Why Blind select is better than Conditional select Statement?
View 10 Replies View RelatedSQL & PL/SQL :: How To Get Next Not Null Value For Current Row
Dec 14, 2010following is my input data:
SELECT TO_DATE('21-NOV-2010') DAY, 0 RATE FROM DUAL
UNION
SELECT TO_DATE('22-NOV-2010') DAY, 10.5 RATE FROM DUAL
UNION
SELECT TO_DATE('23-NOV-2010') DAY, 0 RATE FROM DUAL
UNION
SELECT TO_DATE('24-NOV-2010') DAY, 0 RATE FROM DUAL
UNION
[code]....
SQL & PL/SQL :: Trigger With Null Old Value
Feb 15, 2011I have the following problem.
I have a trigger "before update" that change some values, including a timestamp column. My sql code does an update using the "returning clause" to get the values changed by the trigger. The problem is:
When I do an "update [...] returning timestamp_field", this timestamp_field has the old value equals to null (in the trigger). And, this field in the table is not null. This problem not occurs with the others fields of type number, varchar... only with the timestamp field.
Here are the code to simulate this problem:
--Table
create table TB_TEST
(
ID NUMBER(10) not null,
FLAG NUMBER(10) not null,
TAG VARCHAR2(16) not null,
TS_ATU_DTR TIMESTAMP(9) not null
);
[Code]..
Testing
exec test1;
select * from textolog order by data, texto;
Output:
DATA TEXTO
--------- ----------------------------------------------------------------------------------------------------
15-FEB-11 1:old.FLAG=123, :new.FLAG=321
15-FEB-11 1:old.TAG=teste trigger, :new.TAG=teste trigger
15-FEB-11 1:old.TS_ATU_DTR=, :new.TS_ATU_DTR=
15-FEB-11 2:old.FLAG=123, :new.FLAG=321
15-FEB-11 2:old.TAG=teste trigger, :new.TAG=10
15-FEB-11 2:old.TS_ATU_DTR=, :new.TS_ATU_DTR=15/02/2011 11:07:38.094284000
-----
"old.TS_ATU_DTR=, " Isn't it right?????
Why the other fields aren't null?
I need the "old.TS_ATU_DTR" to use in my other trigger to compare timestamps, how can I get it?
Or, is there a patch for this problem?
PL/SQL :: First Three Not Null Attributes
Oct 29, 2013MY requirment is: I want the first three nullable attributes. For Eg: If I have 60 columns in table, I need to fetch the first three null data in a row.
View 7 Replies View RelatedTrigger With Null Old Value
Feb 15, 2011I have a trigger "before update" that change some values, including a timestamp column. My sql code does an update using the "returning clause" to get the values changed by the trigger. When I do an "update [...] returning timestamp_field", this timestamp_field has the old value equals to null (in the trigger). And, this field in the table is not null. This problem not occurs with the others fields of type number, varchar... only with the timestamp field.
Here are the code to simulate this problem:
--Table
create table TB_TEST
(
ID NUMBER(10) not null,
FLAG NUMBER(10) not null,
TAG VARCHAR2(16) not null,
TS_ATU_DTR TIMESTAMP(9) not null
);
[code]...
Why the other fields aren't null?I need the "old.TS_ATU_DTR" to use in my other trigger to compare timestamps, how can I get it? I am using Oracle 11.2.0 - Suse Linux.
If Column A Is NOT NULL Then Column B Cannot Be NULL
Dec 2, 2011i've got a project and im wondering whether it is possible to create an if statement that says something like
"If column A is NOT NULL then column B cannot be NULL"
would I have to do this as a trigger or a constraint?
SQL & PL/SQL :: NULL Usage?
Mar 31, 2011 when to use || NULL oerator or what is the meaning of this statement when it is used with the column name.
and A.RtmtCd = B.RtmtCd|| NULL
or
A.RtmtCd||NULL IS NOT NULL
SQL & PL/SQL :: Count No Null
Jul 13, 2011SQL> select * from test11;
A B C
--------------------------------------
AA 123
BB 100 200
CC 300
AA
How to count no null in the above table
SQL & PL/SQL :: Variable Is NULL
May 21, 2013 I can't figure out why my variables are not filled up?
TEST CASE
CREATE TABLE LIST_STEP_LINK
(
FAL_SCHEDULE_STEP_ID NUMBER(12) ,
FAL_SCHEDULE_PLAN_ID NUMBER(12) ,
SCS_STEP_NUMBER NUMBER(9) ,
[Code]....
Result:
SQL>
SQL> SET SERVEROUTPUT ON SIZE 1000000;
SQL> DECLARE
2 VAR_SCS_LONG_DESCR FAL_LIST_STEP_LINK.SCS_LONG_DESCR%type;
3 VAR_SCS_FREE_DESCR FAL_LIST_STEP_LINK.SCS_FREE_DESCR%type;
[Code]....
PL/SQL procedure successfully completed.
SQL>
Function With Null Parameters
Mar 17, 2009i 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.
Handling NULL Value In XML Using GetStringVal?
Dec 13, 2012I have below query which works fine if column 'XML_COL' has values. This select statement fails if the value is NULL for
select xmltype(t.xml_col).extract('//fax/text()').getStringVal() from mytab t
How to handle rows with NULL values in the column 'XML_COL'.
How To Catch Null Value With C# Code
Jan 5, 2010how to catch a null value with C# code?
My Asp.Net/C# application is connected to an Oracle database where it retrieves database values and also values calculated/returned from Oracle functions. My problem is that sometimes an Oracle function I calling returns a null value because of not correct input parameters which will cause Oracle function to (I think) return an null value. My problem and question is how to catch/obtain if he Oracle function returns a null value? Oracle function should return a decimal value if correct input parameters. Below is my row of code that crashes when Oracle function returns a null value in case of incorrect input parameters.
decGrossFreightRevenue = (decimal)(OracleNumber)cmdCalculateRevenueCall.ExecuteOracleScalar();
how to change my code to catch a null value and avoid a crash. I have tried several checks (if statements) without success.