Using decode in where clause

Hello

I need to use decode condition in where clause in such a way that if the respective column is null then consider the corresponding column

for example

Fee_date	Fee_refund_date
10 OCTOBER 05
12 NOVEMBER 05
	11 JANUARY 06
	16 FEBRUARY 06

I have a request in place as below where p_fee_flag will be passed as either FEES or set to null, I check another condition as if p_fee_flag is null then fee_date must be set to null when comparing fee_refund_date between TRUNC (BKT. ACT_START_DATE) AND TRUNC (BKT. ACT_END_DATE

SELECT 1

BUCKET BKT

WHERE DECODE (P_FEE_FLAG, 'FEES', TRUNC(FS.) FEE_DATE), TRUNC (FS. FEE_REFUND_DATE))

BETWEEN TRUNC (BKT. ACT_START_DATE) AND TRUNC (BKT. ACT_END_DATE)

944524 wrote:

Hello Alberto,.

Thank you that's what I ask but is it possible to verify the condition even using decode

Yes, it is possible, but why?

Just replace the query in this way:

select *
  from fee_table f
where exists(select 1
                from bucket b
              where decode(:p_fee_flag, 'FEE', f.fee_date, f.fee_refund_date) between b.act_start_date and b.act_end_date)
  and decode(:p_fee_flag, 'FEE', null, f.fee_date) is null;

Kind regards.

Alberto

Tags: Database

Similar Questions

Can I use truncated and where clause in the statement even?
Hello guys,.

Can I use truncated with where clause in the same statement.

For ex:

TRUNCATE TABLE my_table WHERE id < 500;

If not, that you recommend me to overtemperature to the level of high water line?

By the way
```
select * from v$version;
```
Oracle Database 11 g Enterprise Edition Release 11.2.0.1.0 - 64 bit Production
PL/SQL Release 11.2.0.1.0 - Production
"CORE 11.2.0.1.0 Production."
AMT for 64-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
>

Thank you very much.

Published by: 970992 on 11:14 13.Ara.2012
>
Okay I need an increasing amount of space. However, at the same time I want to recover the spaces empty below HWM. So, I need to use less amount of space I am inserting. Therefore, shouldn't use retractable for this?
>
Why waste the effort. Oracle will reuse the space below the HWM when doing inserts. You already said that you insert more lines you delete so all these will be more accustomed to the top.

The only time where that oracle may not use space is when the space is too small to be useful. It is documented in the doc, I told you
>
Understanding recoverable unused space
Over time, Update, and Delete on objects within a tablespace can create pockets of empty space that individually are not large enough to be reused for the new data.
>
Most uses of CONTRACTION I've seen are totally useless. If you follow the doc and run the Advisor of segment it will tell you if there is space that can be retrieved and how much. But, even once, for your use even if case will get you will Oracle while you need to reassign the new extensions, then the HWM will just go still higher.

If pay you a heavy price in Oracle did a full table scan, update of many blocks from the table, update THE index, impact performance for other users to access the table during the SHRINK and reallocate extensions (maybe even some of the same areas) when you insert more data.

Do not SHRINK unless you know it's necessary.

using aliases in where clause
I am using the following query as part of my effort to

Select b.account_number,
b.restriction_code,
a.cusip_number,
a.Symbol,
c.Shares,
Round(((c.shares/NULLIF(TO_NUMBER(a.shares_outstanding),0))*100),4) outstanding_share_percent
br_securities has
b br_accounts,
(select account_number, cusip_number, sum (shares) shares
of br_positions
where account_number not in (select account_number
of br_house_accounts)
Account_number group, cusip_number) c
where a.cusip_number = c.cusip_number
and b.account_number = c.account_number
and b.open_flag = 'Y '.
and a.security_type. a.security_sub_type ("A01", "B01", "B02", "C02")
and round(((c.shares/nullif(to_number(a.shares_outstanding),0))*100),4) (> 10
or round(((c.shares/nullif(to_number(a.shares_outstanding),0))*100),4) < 0
(or round(((c.shares/nullif(to_number(a.shares_outstanding),0))*100),4) is null)
outstanding_share_percent desc order;

Given that the expression round(((c.shares/nullif(to_number(a.shares_outstanding),0))*100),4) occurs again in
where clause, I tried to use the query as shown

Select b.account_number,
b.restriction_code,
a.cusip_number,
a.Symbol,
c.Shares,
a.shares_outstanding,
Round(((c.shares/NULLIF(TO_NUMBER(a.shares_outstanding),0))*100),4) outstanding_share_percent
br_securities has
b br_accounts,
(select account_number, cusip_number, sum (shares) shares
of br_positions
where account_number not in (select account_number
of br_house_accounts)
Account_number group, cusip_number) c
where a.cusip_number = c.cusip_number
and b.account_number = c.account_number
and b.open_flag = 'Y '.
and a.security_type. a.security_sub_type ("A01", "B01", "B02", "C02")
and outstanding_share_percent (> 10
outstanding_share_percent < 0 or
or outstanding_share_percent is null)
outstanding_share_percent desc order;

SQL * more returned this error

ERROR at line 21:
ORA-00904: "OUTSTANDING_SHARE_PERCENT": invalid identifier

Is it possible to modify the query for readability?
Try this:
```
select * FROM
(SELECT
b.account_number,
b.restriction_code,
a.cusip_number,
a.symbol,
c.shares,
a.shares_outstanding,
round(((c.shares/nullif(to_number(a.shares_outstanding),0))*100),4) outstanding_share_percent
from br_securities a,
br_accounts b,
(select account_number,cusip_number,sum(shares) shares
from br_positions
where account_number not in (select account_number
from br_house_accounts)
group by account_number,cusip_number) c
where a.cusip_number = c.cusip_number
and b.account_number = c.account_number
and b.open_flag = 'Y'
and a.security_type||a.security_sub_type in ('A01','B01','B02','C02'))
WHERE ( outstanding_share_percent > 10
or outstanding_share_percent < 0
or outstanding_share_percent is null)
order by outstanding_share_percent desc; 
```
PS: Not tested

Decode in where clause
Thanks in advance

I have table TAbleaa

Input parameter when = 1 then my where clause is a > 1
Input parameter when = 2 then my where clause is a < 1

Select * from tableaa
where (when case & 1 = 1 then a 1 >)
When & 1 = 2 then a < 1)

create table TABLEAA
(
A NUMBER,
PLEASE THE NUMBER,
NUMBER OF END,
NUMBER OF TEACHER,
AVERAGE NUMBER
)
;

Fast loading TABLEAA...
insert into TABLEAA (A, START, END, TEACHER, AVERAGE)
values (10, 1.5,.6,, 499, 500);
insert into TABLEAA (A, START, END, TEACHER, AVERAGE)
values (1, 0,.1, 159, 159);
insert into TABLEAA (A, START, END, TEACHER, AVERAGE)
values (2,.1,.2,, 159, 168);
insert into TABLEAA (A, START, END, TEACHER, AVERAGE)
values (3,.2,.3, 179, 159);
insert into TABLEAA (A, START, END, TEACHER, AVERAGE)
values (4,.1,.2, 250, 300);
insert into TABLEAA (A, START, END, TEACHER, AVERAGE)
values (5,.2,.3, 320, 250);
insert into TABLEAA (A, START, END, TEACHER, AVERAGE)
values (6,.3,.4,, 250, 380);
insert into TABLEAA (A, START, END, TEACHER, AVERAGE)
values (7,.2,.3, 388, 379);
insert into TABLEAA (A, START, END, TEACHER, AVERAGE)
values (8,.3,.4,, 379, 388);
insert into TABLEAA (A, START, END, TEACHER, AVERAGE)
values (9,.4,.5, 388, 400);
insert into TABLEAA (A, START, END, TEACHER, AVERAGE)
values (11.5.6, 420, 448);
commit;

Published by: user1849 on August 26, 2009 14:32
Select * from tableaa
cases where when & 1 = 1 and a > 1 then 1
When 1 = 2 & one< 1="" then="">
end = 1

With the help of DECODE in WHERE clause
Hi, I have a query which goes like this but does not work:

{
SELECT NVL (SUM (NVL(r.cload,0) * NVL(r.duration,0)), 0)
IN saidi_sum_trip_caused_by
SPM_REL_IND_TMP r
WHERE substr(r.scode_trip_caused_by,6,4) in ('N001', 'N002', 'N003', 'N004', 'N005', "N006", "N007")
AND (r.cload 0 GOLD r.cload IS NOT NULL)
AND DECODE (R.CLASSIFICATION_TRIP, 't', r.duration < = 5,)
r.Duration > 5);
}

It seems that there is a problem with my DECODE statement since I've noticed that when you use the DECODE function, a column is assimilated before the DECODE. However, in this case I can't equate the value of r.duration for DECODING since if the value of R.CLASSIFICATION_TRIP is ' t "then I should use < = I use >." How can I go about it? I tried to post in the forums of PL/SQL, but I think that very few people access this area. I get answers faster from here. Thank you.
Fact

using max in where clause

Hi all
I have data that looks like this.
PLAN_INSTANCE DATE_START, DATE_END TOTALS PLAN
1007 1 20150101 20151231 10
1007 2 20140101 20141231 25
1007 3 20130101 20131231 12
1008 1 20150101 20151231 22
1008 2 20140101 20141231 9
I would like you run a query that displays one line per plan based on max (date_start).
I tried
Select the total plan, t.date_start, date_end,
of t_totals t
where t.date_start= (select max (date_start)
of t_totals
where date_start= t.date_start);
but this does not seem to work that I get all the 5 rows instead of 2 rows.
Can you suggest me how can I change my query?
Here is the information of table
CREATE TABLE T_TOTALS
(
PLAN NUMBER (9) NOT NULL,
PLAN_INSTANCE NUMBER 4 NOT NULL,.
DATE_START NUMBER (8) NOT NULL,
DATE_END NUMBER (8) NOT NULL,
NUMBER (9) TOTALS NOT NULL,.
);
CREATE A UNIQUE I_TOTALS ON T_TOTALS INDEX
(SAK_PUB_HLTH, SAK_SHORT);
CREATE INDEX X_TOTALS_1 ON T_TOTALS
(SAK_PUB_HLTH, DTE_EFFECTIVE);
Thanks in advance,
sqlamateur

Hello

2886750 wrote:

Hi Pam,.

I would like to see the data set that results must be displayed

PLAN DATE_START, DATE_END TOTALS

1007 20150101 20151231 10

1008 20150101 20151231 22

How to modify the query to get the data above?

The solution you provided still shows all lines instead of simply max lines (date_start).

Thank you

Really? It seems that the Pam should return only 1 package date_start. Of course, we can not really test without valid CREATE TABLE and INSERT statements, but here's a query using the table scott.emp (which we all have, or can get easily) that uses the same approach:

SELECT ename, deptno, hiredate - you could include all the columns you want

FROM scott.emp m

WHERE hiredate =)

SELECT MAX (s.hiredate)

FROM scott.emp s

WHERE s.deptno = m.deptno

)

ORDER BY deptno

;

This query returns all the 14 rows of table scott.emp; She returned only 3 lines that were later hiredate in each of the 3 deptnos:

ENAME HIREDATE DEPTNO

---------- ---------- -----------

MILLER 10 January 23, 1982

ADAMS 20 23 May 1987

JAMES 30 December 3, 1981

Size of partition on interval range partitioned Table happens when SYSDATE is used in a Where Clause

We have tables interval range partitioned on a DATE, with a partition for each day column - very standard and straight out of doc Oracle.
A 3rd party application queries the tables to find the number of rows based on the date range that is located on the column used for the partition key.
This application uses the date range specified from the current date - i.e. for last two days would be «...» StartDate > SYSDATE-2 "- but the partition size is irrelevant and the explain command plan shows that each partition is included."
In presenting the request uses the date in a variable partition size location and query table is obviously much better.
DB is 11.2.0.3 on RHEL6, and default settings - i.e. nothing that could influence the behavior of the optimizer to something unusual.
I can't work on why this would be the case. It is very easy to reproduce with cases of simple test below.
I would be very interested to hear any views on why it's that way and if anything can be done to allow the size of the partition to work with a query including SYSDATE because it would be difficult to get the application code has changed.
In addition to make a case to change the code, I need an explanation of why query using SYSDATE is not advisable and I know this information.
(1) create a simple partitioned table
```
CREATETABLE part_test
   (id                      NUMBER NOT NULL,
    starttime               DATE NOT NULL,
    CONSTRAINT pk_part_test PRIMARY KEY (id)) 
PARTITION BY RANGE (starttime) INTERVAL (NUMTODSINTERVAL(1,'day')) (PARTITION p0 VALUES LESS THAN (TO_DATE('01-01-2013','DD-MM-YYYY')));
```
(2) fill in the rows of the table 1 million distributed among 10 partitions
```
BEGIN
    FOR i IN 1..1000000
    LOOP
        INSERT INTO part_test (id, starttime) VALUES (i, SYSDATE - DBMS_RANDOM.value(low => 1, high => 10));
    END LOOP;
END;
/
EXEC dbms_stats.gather_table_stats('SUPER_CONF','PART_TEST');
```
(3) to query the Table of data from the last 2 days using SYSDATE in paragraph
```
EXPLAIN PLAN FOR 
SELECT  count(*) 
FROM    part_test
WHERE   starttime >= SYSDATE - 2;
```
-------------------------------------------------------------------------------------------------------
| ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time | Pstart. Pstop |
-------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT |           |     1.     3 × 7895 (1) | 00:00:01 |       |       |
|   1. GLOBAL TRI |           |     1.     3 ×            |          |       |       |
|   2.   RANGE OF PARTITION ITERATOR.           |   111K |   867K | 7895 (1) | 00:00:01 |   KEY | 1048575.
|* 3 |    TABLE ACCESS FULL | PART_TEST |   111K |   867K | 7895 (1) | 00:00:01 |   KEY | 1048575.
-------------------------------------------------------------------------------------------------------
Information of predicates (identified by the operation identity card):
---------------------------------------------------
3 - filter("STARTTIME">=SYSDATE@!-2)
(4) now do the same query, but with SYSDATE - 2 presented as a literal value.
This query returns the same response but very different cost.
```
EXPLAIN PLAN FOR
SELECT count(*) 
FROM part_test
WHERE starttime >= (to_date('23122013:0950','DDMMYYYY:HH24MI'))-2;
```
-------------------------------------------------------------------------------------------------------
| ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time | Pstart. Pstop |
-------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT |           |     1.     8.   131 (0) | 00:00:01 |       |       |
|   1. GLOBAL TRI |           |     1.     8.            |          |       |       |
|   2.   RANGE OF PARTITION ITERATOR.           |   111K |   867K |   131 (0) | 00:00:01 |   356 . 1048575.
|* 3 |    TABLE ACCESS FULL | PART_TEST |   111K |   867K |   131 (0) | 00:00:01 |   356 | 1048575.
-------------------------------------------------------------------------------------------------------
Information of predicates (identified by the operation identity card):
---------------------------------------------------
3 filter ("STARTTIME" > = TO_DATE (' 2013-12-21 09:50 ',' syyyy-mm-dd hh24:mi:ss'))))
Thank you in anticipation
Jim

sysdate is not constant and its value may change from time optimization of execution; but the optimizer can deduce that he will be a known running value and then produce a plan that will make the size of partition running. This is the meaning of 'KEY' in the column pstart – the partition of departure will be known at run time and the size of partition will take place in order to eliminate the previous partitions.

Concerning

Jonathan Lewis

How to use DATE in where clause

I need to select the list of records in a table where the available date is greater than or equal to the current date. This is the structure of the table and
Select the query that is used to get the list of records

CREATE TABLE TEMP (ITEM_ID NUMBER(20),ITEM_NAME VARCHAR2(100),CREATION_DATE DATE,AVAILABLE_DATE DATE);

INSERT INTO TEMP (ITEM_ID,ITEM_NAME,CREATION_DATE,AVAILABLE_DATE) VALUES(1,'ITEM1',SYSDATE,SYSDATE);
INSERT INTO TEMP (ITEM_ID,ITEM_NAME,CREATION_DATE,AVAILABLE_DATE) VALUES(2,'ITEM2',SYSDATE,SYSDATE+10);
INSERT INTO TEMP (ITEM_ID,ITEM_NAME,CREATION_DATE,AVAILABLE_DATE) VALUES(3,'ITEM3',SYSDATE,SYSDATE-10);
INSERT INTO TEMP (ITEM_ID,ITEM_NAME,CREATION_DATE,AVAILABLE_DATE) VALUES(4,'ITEM4',SYSDATE,SYSDATE);
INSERT INTO TEMP (ITEM_ID,ITEM_NAME,CREATION_DATE,AVAILABLE_DATE) VALUES(5,'ITEM5',SYSDATE,SYSDATE+5);

SELECT ITEM_NAME, available_date FROM TEMP WHERE available_date > SYSDATE OR available_date LIKE SYSDATE;

I get the documents expected but I'm not able to find a condition where I can use * > = * a query as the below a date data type, is
do not return only documents not expected

SELECT ITEM_NAME, available_date FROM TEMP WHERE available_date >= SYSDATE ;

Published by: Barro on March 19, 2012 21:13

Hello

Barros says:
I need to select the list of records in a table where the available date is greater than or equal to the current date. This is the structure of the table and
Select the query that is used to get the list of records

CREATE TABLE TEMP (ITEM_ID NUMBER(20),ITEM_NAME VARCHAR2(100),CREATION_DATE DATE,AVAILABLE_DATE DATE);

INSERT INTO TEMP (ITEM_ID,ITEM_NAME,CREATION_DATE,AVAILABLE_DATE) VALUES(1,'ITEM1',SYSDATE,SYSDATE);
INSERT INTO TEMP (ITEM_ID,ITEM_NAME,CREATION_DATE,AVAILABLE_DATE) VALUES(2,'ITEM2',SYSDATE,SYSDATE+10);
INSERT INTO TEMP (ITEM_ID,ITEM_NAME,CREATION_DATE,AVAILABLE_DATE) VALUES(3,'ITEM3',SYSDATE,SYSDATE-10);
INSERT INTO TEMP (ITEM_ID,ITEM_NAME,CREATION_DATE,AVAILABLE_DATE) VALUES(4,'ITEM4',SYSDATE,SYSDATE);
INSERT INTO TEMP (ITEM_ID,ITEM_NAME,CREATION_DATE,AVAILABLE_DATE) VALUES(5,'ITEM5',SYSDATE,SYSDATE+5);

SELECT ITEM_NAME, available_date FROM TEMP WHERE available_date > SYSDATE OR available_date LIKE SYSDATE;

Both operands for AS are supposed to be strings. Do not try to use a DATE, such as SYSDATE, with AS.

I get the documents expected but I'm not able to find a condition where I can use * > = * a query as the below a date data type, is
do not return only documents not expected
SELECT ITEM_NAME, available_date FROM TEMP WHERE available_date >= SYSDATE ;

It returns the results I expect.
If you'd say what results you expected, could someone help you wite a query to get.

Assuming that 1 second elapses between the time "ITEM4" is inserted and that 2nd query execution, then, running, available_date will be 1 second less than SYSDATE, so it shouldn't be included.
If you want to find lines that are on the same calendar day as SYSDATE or later, then use

WHERE    available_date >= TRUNC (SYSDATE)

How to use a function in a Where Clause?
Hello
I have a doubt. If MY_FUNCT is a function that returns a Boolean value, can I use in a where clause clause to write a query like this? :

Select...
table one
where the...
*...*
and MY_FUNC (a.field) = true
*...*
*;*

Thank you!

Published by: Mark1970 on 3.27 lug-2-2010
But is it possible that the function does not return a Boolean value?

Yes (as sysdate, substr and instr etc.) you can also use your own function in a where clause clause, as long as it does not return a BOOLEAN value.

I mean how to use a function in a where clause clause?

Your own pseudocode seems a good example for me.
So, just give it a try.

Can I use DECODE or CASES when it is in this context?
Hi, I have a query which goes like this but does not work:

{
SELECT NVL (SUM (NVL(r.cload,0) * NVL(r.duration,0)), 0)
IN saidi_sum_trip_caused_by
SPM_REL_IND_TMP r
WHERE substr(r.scode_trip_caused_by,6,4) in ('N001', 'N002', 'N003', 'N004', 'N005', "N006", "N007")
AND (r.cload <>0 r.cload GOLD IS NOT NULL)
AND DECODE (R.CLASSIFICATION_TRIP, 't', r.duration < = 5, )
r.Duration > 5);
}

It seems that there is a problem with my DECODE statement since I've noticed that when you use the DECODE function, a column is assimilated before the DECODE. However, in this case I can't equate the value of r.duration for DECODING since if the value of R.CLASSIFICATION_TRIP is ' t "then I should use < = I use >." How can I go about it? Thank you.
try all the Subforums are you not

go here:

With the help of DECODE in WHERE clause

where clause to query the hierarchy in the tree Apex area does not

Hi all
I am building a tree Menu in Apex 5.0.3 (Oracle 11 g XE), when using when the clause, it does show all the data, but without him, showing all the data.
I'm trying to populate Tree Menu with data specific to a user successfully logged on.
(A) table created as HR2. TREE_MENU
menu_name varchar2 (50).
number of menu_parent
number of menu_child
menu_id varchar2 (12),
menu_path varchar2 (100),
number of user_no
(B) SQL statement for the tree in the Apex region
Select case when connect_by_isleaf = 1 then 0
When level = 1 then 1
else -1
end the status,
level,
'Menu_name' as the title,
NULL as an icon,
"MENU_CHILD" as a value.
NULL as ToolTip,
NULL as link
to HR2. "" TREE_MENU ".
-WHERE USER_NO =: P_USERNO
Start with 'MENU_CHILD' is null
connect prior "MENU_PARENT" = "MENU_CHILD."
brothers and sisters of order by 'MENU_ID '.
Note: also used static value where clause but is not workd.
that the mistake of me or something else? When using the wizard, she asks (possibly) where clause, this means that when the clause can be used in the SQL statement.
Help, please.
Kind regards.

If you want to prune your tree to show only the elements of the No. 7 usermenu, copy the following code helps you
```
select case when connect_by_isleaf = 1 then 0
            when level = 1             then 1
            else                           -1
       end as status,
       level,
       "MENU_NAME" as title,
       null as icon,
       "MENU_CHILD" as value,
       null as tooltip,
       null as link
from HR2."TREE_MENU"
start with "MENU_CHILD" is null
connect by
    prior "MENU_PARENT" = "MENU_CHILD"
    and "USER_NO" = 7
order siblings by "MENU_ID"
```
Concerning

Mahmoud

several instructions box in where clause

Hello
I'm trying to create report filters using substitution variables in a case statement in a where clause clause. I have several instructions box running on the same column. I don't really know how to write it. Here's what I have so far but I know I'm going in the wrong direction.
where
i.compute_zone =
case
When: P14_zone is NOT NULL
then: P14_zone
of other i.compute_zone
end
AND
i.compute_zone =
case
When: P14_zone_2 is NOT NULL
then: P14_zone_2
other: P14_zone
end
AND
i.compute_zone =
case
When: P14_zone_3 is NOT NULL
then: P14_zone_3
of other i.compute_zone
end
AND
i.compute_zone =
case
When: P14_zone_4 is NOT NULL
then: P14_zone_4
of other i.compute_zone
end
any suggestions?
Thank you
MICAH

Hi, Micah,

User12611868-Oracle wrote:

Hello

I'm trying to create report filters using substitution variables in a case statement in a where clause clause. I have several instructions box running on the same column. I don't really know how to write it. Here's what I have so far but I know I'm going in the wrong direction.

where

i.compute_zone =

case

When: P14_zone is NOT NULL

then: P14_zone

of other i.compute_zone

end

AND

i.compute_zone =

case

When: P14_zone_2 is NOT NULL

then: P14_zone_2

other: P14_zone

end

AND

i.compute_zone =

case

When: P14_zone_3 is NOT NULL

then: P14_zone_3

of other i.compute_zone

end

AND

i.compute_zone =

case

When: P14_zone_4 is NOT NULL

then: P14_zone_4

of other i.compute_zone

end

any suggestions?

Thank you

MICAH

How get the desired results of your data depends on the desired results and your data. What do you do? (I can't tell just by looking at the aat code that do not do). After CREATE TABLE and INSERT statements for some sample data and a couple of sets of parameters (variables such as p14_zone) and the exact results that your choices in each set of parameters, given the same sample data.

Check out the Forum FAQ: Re: 2. How can I ask a question on the forums?

CASE expressions are generally not useful in a WHERE clause. CASE expressions are a convenient way to IF-THEN-ELSE logic of the places where you can't do anything other than (the SELECT clause), but WHERE the clauses allow IF-THEN-ELSE logic in any case

Maybe you want something like

WHERE MERGE (: p14_zone,: p14_zone_2,: p14_zone_3,: p14_zone_4) IS NULL

OR IN i.compute_zone (: p14_zone,: p14_zone_2,: p14_zone_3,: p14_zone_4)

It returns TRUE if all 4 parameters are set to NULL. If 1 or more of them are not NULL, then it will return TRUE if i.compute_zone is equal to one of them.

ORA-01722: number not valid only in where clause
I'm getting ORA-01722: invalid number when you use to_number in where clause:
```
select to_number(txt_field) from tbl where 100>=to_number(txt_field);
```
I don't get it without where clause (300 rows returned):
```
select to_number(txt_field) from tbl;
```
No logical explanation?

Published by: totalnewby on February 21, 2012 04:54
totalnewby wrote:
No logical explanation?

Let me guess - tbl is actually a point of view:
```
SQL> create table tbl(code varchar2(10),val varchar2(10));

Table created.

SQL> insert into tbl values('string','abc');

1 row created.

SQL> insert into tbl values('number','123');

1 row created.

SQL> create or replace
  2    view tbl_vw
  3      as
  4        select  *
  5          from  tbl
  6          where code = 'number'
  7  /

View created.

SQL> select  to_number(val)
  2    from  tbl_vw
  3  /

TO_NUMBER(VAL)
--------------
           123

SQL> select  to_number(code)
  2    from  tbl_vw
  3    where to_number(val) > 100
  4  /
select  to_number(code)
        *
ERROR at line 1:
ORA-01722: invalid number

SQL> 
```
Reason is first selection from the first filters view (find out where clause) out of the non-numeric values and then only apply to_number. When the second select is run optimizer merges the view definition and where would adopt becomes:

where where code = 'number '.
and to_number (val) > 100

Since there is no order of predicate, it happens that to_number (val) > 100 is applied first, and he obviously fails.

SY.

CASE in a WHERE clause: ORA-00905
Hello world
I try to use a BOX in a WHERE clause clause and I got the error ORA-00905: lack of keyword. Here is my code:

SELECT id_reserv,
Concat (name, Concat ('_', index)) as name,
Libelle,
num_lot,
resa_keyword1,
resa_keyword2,
resa_keyword3,
resa_keyword4,
date_creation,
comm_creation,
id_util,
assets,
id_env_act,
(SELECT connection of user u where u.id_util = r.id_util) AS nom_util,
(SELECT name e environment where e.id_env = r.id_env_act) AS nom_env,
(SELECT count (*) of rc reserv_comp where rc.id_reserv = r.id_reserv) AS nbComp,
(SELECT count (*) MC reserv_modif where mc.id_reserv = r.id_reserv) AS nbModif
BOOKING r
WHERE the r.nom NOT LIKE 'RESERV_LOT_ % '.
AND id_util = '1'
AND active = '1'
AND id_env_act > = '-1'.
AND the MATTER sansdemande
WHEN true THEN id_reserv not in some id_reserv from demande_livraison where id_env_dep > = '-1'.
ELSE id_reserv = id_reserv
END
AND name LIKE '% '.
ORDER BY date_creation;

I already looked at the CASE statement and it seems that the syntax is correct, so I don't know I can use in a WHERE clause.
Any help would be nice!

Andalusians
Hello

It should be something like this:
```
AND CASE
  WHEN 'false'='true' THEN (select id_reserv from demande_livraison where id_env_dep>='-1')
  ELSE id_reserv
     END = id_reserv 
```
The subquery must return a line

But I think that it is better to write your query in the form:
```
SELECT id_reserv,
     concat(nom,concat('_',indice)) as nom,
     libelle,
     num_lot,
     resa_keyword1,
     resa_keyword2,
     resa_keyword3,
     resa_keyword4,
     date_creation,
     comm_creation,
     id_util,
     actif,
     id_env_act,
     (SELECT login from utilisateur u where u.id_util=r.id_util) AS nom_util,
     (SELECT nom from environnement e where e.id_env=r.id_env_act) AS nom_env,
     (SELECT count(*) from reserv_comp rc where rc.id_reserv=r.id_reserv) AS nbComp,
     (SELECT count(*) from reserv_modif mc where mc.id_reserv=r.id_reserv) AS nbModif
FROM reservation r
     WHERE r.nom NOT LIKE 'RESERV_LOT_%'
     AND id_util='1'
     AND actif='1'
     AND id_env_act>='-1'
     AND
                   (
                      (  'false'='true' and id_reserv not in (select id_reserv from demande_livraison where id_env_dep>='-1')
                      )
                      or
                      ( 'true'= 'true' and id_reserv=id_reserv
                      )
                   )
     AND nom LIKE '%'
ORDER BY date_creation;
```
This coding in SQL something as if a = b, then c, d also in the simplest form.

Herald tiomela
http://htendam.WordPress.com

several conditional parameters in where clause

How to select records in a table, when I say emp, a parameter for where the condition as
If empno is known then use in where clause,
If ename is known then use ename in where clause,
If both are known then use two parameters in where clause.

I use Oracle 9i.

psuedo code.
...
if p_empno is not null and p_ename is not null then
select * from emp 
where empno=p_emp and ename = p_ename ;
elsif p_empno is null and p_ename is not null then
select * from emp 
where ename = p_ename ;
elsif p_empno is not null p_ename is null then
select * from emp 
where empno=p_emp ;
else 
select * from emp 
end if ;
...

How can I do this in sql and plsql

Thank you

Published by: user10999538 on July 15, 2009 03:29

Solution

SELECT *
FROM   emp
WHERE  Nvl(empno,-9999) = Coalesce(p_empno,empno,-9999)
       AND Nvl(ename,'X') = Coalesce(p_ename,ename,'X')
/

Using decode in where clause

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