Trigger With Null Old Value
Feb 15, 2011
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. 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.
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Feb 15, 2011
I 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?
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Aug 29, 2012
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.
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Jun 21, 2010
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
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Mar 16, 2011
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)
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Oct 24, 2013
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.
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Jan 9, 2012
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
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Jul 12, 2012
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 :
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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
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Initially i have inserted the data into table like
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1/1/12 1 1
2/1/12 null null
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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* .
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How can "call one trigger of item in trigger of form"
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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?
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Mar 10, 2010
Can we call trigger in another trigger,if it is possible any example.
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Dec 14, 2010
following 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]....
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MY 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.
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select columnname,null columnname from tablename
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Dec 2, 2011
i've got a project and im wondering whether it is possible to create an if statement that says something like
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SQL> select * from test11;
A B C
--------------------------------------
AA 123
BB 100 200
CC 300
AA
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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]....
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SQL>
SQL> SET SERVEROUTPUT ON SIZE 1000000;
SQL> DECLARE
2 VAR_SCS_LONG_DESCR FAL_LIST_STEP_LINK.SCS_LONG_DESCR%type;
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PL/SQL procedure successfully completed.
SQL>
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I have 2 tables, AFF_TEMP and COUNTY
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Both tables have the following test data
AFF_TEMP
Joe, Bloggs, joe@gmail.com, ''
Ann, Bloggs, anne@gmail.com,Donegal
and COUNTY column in AFF_TEMP can contain a NULL value
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3, Tipperary,
4, Galway
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Feb 12, 2013
I have a two tables with same column name , I wanted to find different record in table1 when compared with table2
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create table table2(col1 number,col2 number,col3 number,col4 number,col5 number);
insert into table1 values(1,2,NULL,NULL,NULL);
insert into table2 values(1,2,NULL,NULL,NULL);
commit;
select col1 from (select col1,col2,col3,col4,col5 from table1 minus select col1,col2,col3,col4,col5 from table2);
no rows selected
how come i get no rows selected when col3,col4,col5 is having null values but NULL could be anything so
NULL-NULL cannot be equal to zero how is it possible
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