Using Date in where clause

Hello all,
I am new to Oracle, currently using 10G + aspvbscript.
I've been trying to query data using date in where clause but nothing seems to work.
The column is in date format.
It gets printed out like this: 5/1/2010 11:21:19 AM
I tried using this query:
SELECT * from table where TRUNC(user_date) > to_date('FEB-01-2010:00:00:00','mm-dd-yyyy:HH24:MI:SS') order by user_date asc.
It does return an output but it returns everything in table and does not take WHERE clause into consideration however, it does sort the date in ascending order.
I've tried getting rid of TRUNC tried to format date in a different way but no such luck.
Please point me to the right direction.
Thanks.

Welcome to the forums!
In cases like this it is helpful if you can provide the following information:
1. Oracle version (SELECT * FROM V$VERSION)
2. Sample data in the form of CREATE / INSERT statements.
3. Expected output
4. Explanation of expected output (A.K.A. "business logic")
5. Use \ tags for #2 and #3. See FAQ (Link on top right side) for details.
I'll try and take a stab at your request based on the data given. What your query says is that it will return all rows that have a date greater then 2/1/2010 (MM/DD/YYYY). If your query is returning all rows then maybe the possibility exists that all the dates in the table are greater then 2/1/2010. Have you checked all dates to see if this is the case?
Also, one note about your TO_DATE() function.to_date('FEB-01-2010:00:00:00','mm-dd-yyyy:HH24:MI:SS')The date format does not match the string you are using with respect to month. Your string has 'FEB' but the format is 'MM' which is the numeric representation of the month. Although Oracle was able to convert it to the proper date on my system you should try and maintain consistency between the string and the date format used.

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Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
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The strange thing compared to your output is that I get an error when I have table prefix in the query block:
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Nicolas.
PS: as you can see, I'm on 11.2.0.4, I do not have 11.2.0.1 that you seem to use.

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Using function in where clause

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Hi,
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Hi Kevin,
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Example:
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2> go
1> insert t values ("abc")
2> insert t values ("abcdefghijkl")
3> go
(2 rows affected)
1> select * from t where x like "%c%"
2> go
x
abc
abcdefghijkl
(2 rows affected)
1> select * from t where x !> "c"
2> go
Msg 257, Level 16, State 1:
Server 'redhead', Line 1:
Implicit conversion from datatype 'TEXT' to 'VARCHAR' is not allowed. Use the
CONVERT function to run this query.
Msg 306, Level 16, State 5:
Server 'redhead', Line 1:
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the LIKE expression and IS [NOT] NULL predicate on columns.

Using a dummy where-clause to force the use of an index

I notice that an index only gets used when I use the index key in the where clause. Should I use a dummy where clause to force the index to be used?
SQL> create table emp (
2 empno NUMBER(5),
3 empname VARCHAR2(15) );
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SQL> create index idx_emp_no on emp (empno);
Index created.
SQL> insert into emp (empno, empname) values (1, 'Peter');
1 row created.
SQL> set autotrace traceonly;
SQL> select empno from emp;
Execution Plan
Plan hash value: 3956160932
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 13 | 3 (0)| 00:00:01 |
| 1 | TABLE ACCESS FULL| EMP | 1 | 13 | 3 (0)| 00:00:01 |
SQL> select empno from emp where empno > 0;
Execution Plan
Plan hash value: 434430053
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 13 | 1 (0)| 00:00:01 |
|* 1 | INDEX RANGE SCAN| IDX_EMP_NO | 1 | 13 | 1 (0)| 00:00:01 |
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Again. Be careful with comparisons. But I like the discussion. It is usefull to carefully look at what happens "behind the scenes" and find a sensible explaination for that.
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The cost in my environment for option B is 3.
Option A has a cost with 2. Therefore the CBO prefers Option A.
However this can easily change.
Consider the following
begin
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commit;
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1001 Zeilen ausgewõhlt.
Ausf³hrungsplan
Plan hash value: 3956160932
| Id | Operation         | Name | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT |      | 1001 | 12012 |     3   (0)| 00:00:01 |
|* 1 | TABLE ACCESS FULL| EMP | 1001 | 12012 |     3   (0)| 00:00:01 |
Predicate Information (identified by operation id):
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Statistiken
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         74 consistent gets
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          0 redo size
      18356 bytes sent via SQL*Net to client
       1250 bytes received via SQL*Net from client
         68 SQL*Net roundtrips to/from client
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          0 sorts (disk)
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If we force it to use an index then the cost increases.
SQL> set linesize 100
SQL> select /*+INDEX(emp) */ * from emp where empno = 1
1001 Zeilen ausgewõhlt.
Ausf³hrungsplan
Plan hash value: 2426388914
| Id | Operation                   | Name      | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT            |           | 1001 | 12012 |     5   (0)| 00:00:01 |
|   1 | TABLE ACCESS BY INDEX ROWID| EMP       | 1001 | 12012 |     5   (0)| 00:00:01 |
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          0 recursive calls
          0 db block gets
        139 consistent gets
          0 physical reads
          0 redo size
      30550 bytes sent via SQL*Net to client
       1250 bytes received via SQL*Net from client
         67 SQL*Net roundtrips to/from client
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Using multiple dates in WHERE clause

I have a multiple select box in a form. I am trying to select
records in SQL using the list that this form field produces. They
are dateTime values. How do I use this list in the WHERE clause of
my select statement?

Man, I really hate posting anywhere near Dan - I've been
watching his mastery for years. (Talk about the big leagues) But
here goes anyway...
I've gotten my little behind kicked by more than a view date
issues, and I have basically gotten away from exact matches (unless
you really need them).
I'd probably do something like this:
SELECT field1,field2...
WHERE datetime_column_in_db > (OR LTE,OR GT/LT)
'#datetimeformatyoulike(form.datetimevalue1)#
Basically, finding records in RELATION to the form's datetime
value has always been much easier for me.
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Using collections in WHERE clause

Hi friends,
Please help me to use an associate array in SQL query (WHERE clause). The requirement is similar to the following example:
===============================================
declare
type rec_emp is record(emp_id integer, emp_name varchar2(100));
type ty_emp is table of rec_emp index by pls_integer;
tb_emp ty_emp;
type ty_emp_history is table of emp_history%rowtype index by pls_integer;
tb_emp_history ty_emp_history;
begin
select emp_id, emp_name
bulk collect into tb_emp
from emp
where dept_id = 10;
--Now I want to fetch records from emp_history based on the values in tb_emp. So I want a query something like the following.
--(I know that join can be used to achive this. But it is just an example. I need to achive this in collections.)
select *
bulk collect into tb_emp_history
from emp_history
where emp_id = tb_emp.emp_id
and emp_name = tb_emp.emp_name;
end;
===============================================
Thanks in advance.
Edited by: Iniyavan on Oct 26, 2012 11:50 AM

>
Please help me to use an associate array in SQL query (WHERE clause).
select *
bulk collect into some_array
>
there is no variable 'some_array' in what you posted.
If you want help with your code you have to post the code you are really using, not some hacked-up version of it that has errors.
Here is sample code that shows how to treat a collection as a table using the TABLE operator
-- type to match emp record
create or replace type emp_scalar_type as object
(EMPNO NUMBER(4) ,
   ENAME VARCHAR2(10),
   JOB VARCHAR2(9),
   MGR NUMBER(4),
   HIREDATE DATE,
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create or replace type emp_table_type as table of emp_scalar_type
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tb emp_table_type;
deptnoList sys.OdciNumberList;
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Using Filter and where clause in GoldenGate

Hi,
I need to use where clause in extract process.
The condition i need to use is :- where (CODE LIKE '10%' OR CODE LIKE '0%')
how to use LIKE operation along with OR in extract.
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GoldenGate uses FILTER and SQLPREDICATE (and COMPUTE is a variation that can work, depending on how you are trying to manipulate the data).
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● A FILTER or WHERE clause in a TABLE statement (Extract) or in a MAP statement (Replicat).
● A SQL query or procedure
● User exits
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< (less than)
<= (less than or equal)
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Conjunctive operators AND, OR
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Use the @STREXT function to extract a portion of a string and do a comparison there. Or take care of it using SQLEXEC on replicat (call a function to be able to use LIKE).

Regd. using functions in where clause

Hi All,
I need to apply a set of functions in sysdate and use that in a where clause to compare. My question is, will these functions on sysdate be executed for every record in the tables that I use? Will this have performance impact when i have millions of records returned by the select?
Below is the scenario:
Select * from table A inner join table B on A.c1 = B.c1 where
TO_NUMBER(TO_CHAR(TRUNC(LAST_DAY(ADD_MONTHS(SYSDATE, -1))),'YYYYMMDD')) BETWEEN Date1 and Date2
Regards,
Raj.D

1005330 wrote:
I need to apply a set of functions in sysdate and use that in a where clause to compare. My question is, will these functions on sysdate be executed for every record in the tables that I use? Will this have performance impact when i have millions of records returned by the select?
Below is the scenario:
Select * from table A inner join table B on A.c1 = B.c1 where
TO_NUMBER(TO_CHAR(TRUNC(LAST_DAY(ADD_MONTHS(SYSDATE, -1))),'YYYYMMDD')) BETWEEN Date1 and Date2
Test it on a small data set - run a query and check the execution plan to see what the predicate section tells you.
Oracle OUGHT to be smart enough to recognise that you've got a constant that it need only calculate once. If not, then change the usage to read:
(select TO_NUMBER(TO_CHAR(TRUNC(LAST_DAY(ADD_MONTHS(SYSDATE, -1))),'YYYYMMDD')) from dual) BETWEEN Date1 and Date2Note, by the way, that 'constant between col1 and col2' is generally a tough one as far as efficiency is concerned; it translates to:
col1 <= constant
and col2 >= constantIn many cases this means oracle has to access a large volume of data (for one of the predicates) and then filter that data (with the other predicate). A typical damage limitation strategy is to create an index on the two columns, arrangin the column order to minimise the range scan on the first column.
Depending on your data patterns and the nature of the predicate there are alternative optimiisation strategies.
Regards
Jonathan Lewis

Compare Date in where clause

Hi,
I have query which i used to display the new status that happend. Here in the where clause i am checking the dates for comparisiion but the query say no data found
But data found in the table Please suggest how to put a join condition on dates. or is there any other way to write this query
select distinct SDM from PROJECT_START_UP
where project_name = :p1_projects and
check_id = 44 and
CREATION_DATE like (select max(CREATION_DATE) from project_start_up where check_id = 44)
Thanks
Sudhir

Why you're using LIKE operator instead of '='??
Please try whether you have data
select distinct SDM from PROJECT_START_UP
where project_name = :p1_projects and
check_id = 44 If above query returned data, then run
select distinct SDM from PROJECT_START_UP
where project_name = :p1_projects and
check_id = 44 and CREATION_DATE = (select max(CREATION_DATE) from project_start_up where check_id = 44)- - - - - - - - - - - - - - - - - - - - -
Kamran Agayev A. (10g OCP)
http://kamranagayev.wordpress.com

Date in where clause without Trunc

Hi,
How handle a date comparision in where clause without trunc. Rightnow I am using it with 'trunc', it is very slow..
Select ColumnA, ColumnB
From Sample
Where trunc(created_date,'DD-MON-YY') = '15-NOV-2011';
CREATE TABLE SAMPLE
     ColumnA NUMBER(9,0)           NOT NULL,
     ColumnB VARCHAR2(255)      NOT NULL,
     created_date                DATE
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Hi,
Here's one way:
SELECT ColumnA, ColumnB
FROM      Sample
WHERE      created_date     >= TO_DATE ('15-NOV-2011', 'DD-MON-YYYY')
AND     created_date     < TO_DATE ('15-NOV-2011', 'DD-MON-YYYY') + 1
;If you have an index on created_date. then this query will be able to use that index, because created_date is alone on one side of the operator.
Another reason why this will be faster is that it only has to call TO_DATE twice, regardless of how many rows are in the table. The original query had to call TRUNC for every row.
Don't compare a DATE (such as the results of TRUNC) to a string (such as '15-NOV-2011'). You're liable to get a run-time error, or, if youre not so lucky, unexpected results.
Edited by: Frank Kulash on Nov 15, 2011 5:22 PM

Clarification on using function in where clause of oracle sql query

I have an issue in regarding function using where clause of sql query..
We are facing performance issue while executing query, so in what ways to improve the performance of the query which i have posted below.
select col ,case when my_function(parameter)
from tab1 a ,tab2 b,tabl3 c
where a.column1=b.column2
and b.column3 =c.column6
and my_function(parameter)>0
Regards
Dinesh
Edited by: wild fire on May 18, 2012 4:15 PM

Dinesh,
remind that when you use a function in the where clause it normally will get started for each record in the table.
So your answer is two-fold:
1. make the function only start when needed by adding a function based index on the table (this will make inserts and updates slower)
2. make the function faster by adding the DETERMINISTIC clause if possible. this will make Oracle "cache" the result of the function.
Regards,
Richard
blog: http://blog.warp11.nl
twitter: @rhjmartens
If this question is answered, please mark the thread as closed and assign points where earned..

Using decode in where clause

Hi all
We can use decode function in the Select columns as well as Group by Columns as well as Having Clause
Can we use decode function in the where clause also. If yes can u give small sample
Suresh Bansal

""DECODE in the WHERE clause"
http://psoug.org/reference/decode_case.html
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                          2, NVL(st.storemgr1, st.storemgr2),
                          3, NVL(st.asstmgr1, NVL(st.asstmgr2,
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Using Date in where clause

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