How to use the instruction box in where clause

Hi all

I need to use cases where clause guide me please how I can do it.

AND WHEN BOX: KAPCO = "KAPCO" THEN cla. CLASS_NAME LIKE '% KAPCO % '.
WHEN: KAPCO = "NON_KAPCO" THEN SUPERIOR (cla. CLASS_NAME) NOT LIKE '% KAPCO % '.
WHEN: KAPCO = 'ALL' GOLD: KAPCO IS NULL SO SUPERIOR (cla. CLASS_NAME) LIKE '% '.
END

Concerning

Published by: user10941925 on March 4, 2012 22:31

Hello

CASE expressions return a single value, for example a VARCHAR2. They do refer to code fragments.

You usually don't need (or want) an expression BOX in a WHERE clause, or any other condition. I think that you were trying to do the equivalent of:

AND     (     (:KAPCO = 'KAPCO'          AND cla.CLASS_NAME       LIKE '%KAPCO%')     -- Don't you want UPPER on this line?
     OR     (:KAPCO = 'NON_KAPCO'           AND UPPER(cla.CLASS_NAME) NOT LIKE '%KAPCO%')
     OR     (NVL (:KAPCO, 'ALL') = 'ALL'       AND cla.CLASS_NAME IS NOT NULL)
     )

If you would care to post some sample data (CREATE TABLE and INSERT statements) and the results desired from this data, I was able to test this.

Tags: Database

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How to use a function in a Where Clause?
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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.

Using the Case statement in Where clause with operator
Hi all

I'm doing the following work (this is just a simple version of what I'll eventually need):

Sorry, I forgot how to use the code tags...

and li. MAJOR_ACCT in case
When: prompt = 'Energy' then ('9320906 ', ' 9321471')
end

Problem is that I get a missing closing parenthesis error.

Wouldn't - that evaluate against a value(as below) it works fine:

and li. MAJOR_ACCT in case
When: prompt = 'Energy' then ('9320906')
end

Any thoughts? Is it possible to use a box (or decode) in an In clause with multiple values? I tried to use decode as well and get the same results.

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What:
```
and ( case
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        when :prompt = 'Vehicle' and li.MAJOR_ACCT in ('9812180', '9812320')  then 1
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    ) = 1
```

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.

Using the index function in where clause of Exchange.

Hello friends,

I need your help with a problem.

I have a query that uses two table Say T1 and T2, where C1 is common column with which both are joined.
C1 is the primary key in T1, but no index available in Q2 for the C1. T1C2 is the column that we want to select.
(Note that table may be a Master table)

Now let's see the query:
Select T1C2
From T1, T2
where T2. C1 = T1. C1

Here where the clause may have other conditions and From clause can have other tables as needed.

I want to know that if I have change the query as continuation of leave my query to use the index available of T1. C1.

Select T1C2
from T1, T2
where T1. C1 = T2.C1

Then, the query uses the index available of T1. and I get better performance. Even a small improvement of performance help me much because this type of query is used in a loop where clause (so it will be run several times).

Please advise on this...

Kind regards
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Hello

18:43:17 rel15_real_p>create table t1(c1 number primary key, c2 number);

Table created.

18:43:26 rel15_real_p>create table t2(c1 number, c2 number);

18:45:08 rel15_real_p>
18:45:09 rel15_real_p>begin
18:45:09   2  for i in 1..100
18:45:09   3  loop
18:45:09   4        insert into t1(c1,c2) values (i,i+100);
18:45:09   5  end loop;
18:45:09   6  commit;
18:45:09   7  end;
18:45:09   8  /

PL/SQL procedure successfully completed.

18:45:09 rel15_real_p>
18:45:09 rel15_real_p>
18:45:09 rel15_real_p>begin
18:45:09   2  for i in 1..100
18:45:09   3  loop
18:45:09   4        insert into t2(c1,c2) values (i,i+200);
18:45:09   5  end loop;
18:45:09   6  commit;
18:45:09   7  end;
18:45:09   8  /

18:45:23 rel15_real_p>select count(*) from t1;

  COUNT(*)
----------
       100

18:45:30 rel15_real_p>select count(*) from t2;

  COUNT(*)
----------
       100

18:45:49 rel15_real_p>select index_name,index_type from user_indexes where table
_name='T1';

INDEX_NAME                     INDEX_TYPE
------------------------------ ---------------------------
SYS_C0013059                   NORMAL

18:48:21 rel15_real_p>set autotrace on
18:52:25 rel15_real_p>Select T1.C2
18:52:29   2  From T1, T2
18:52:29   3  where T2.C1 = T1.C1
18:52:29   4  /

        C2
----------
       101
       102
       103
       104
       105
  .....
  ......

        C2
----------
       200

100 rows selected.

Execution Plan
----------------------------------------------------------
   0      SELECT STATEMENT Optimizer=ALL_ROWS (Cost=7 Card=100 Bytes=
          900)

   1    0   HASH JOIN (Cost=7 Card=100 Bytes=3900)
   2    1     TABLE ACCESS (FULL) OF 'T1' (TABLE) (Cost=3 Card=100 By
          es=2600)

   3    1     TABLE ACCESS (FULL) OF 'T2' (TABLE) (Cost=3 Card=100 By
          es=1300)

Statistics
----------------------------------------------------------
          0  recursive calls
          0  db block gets
         21  consistent gets
          0  physical reads
          0  redo size
       1393  bytes sent via SQL*Net to client
        562  bytes received via SQL*Net from client
          8  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
        100  rows processed

18:52:31 rel15_real_p>analyze table t1 compute statistics;

Table analyzed.

18:55:35 rel15_real_p>analyze table t2 compute statistics;

18:55:38 rel15_real_p>set autotrace on
18:55:42 rel15_real_p>Select T1.C2
18:55:43   2  From T1, T2
18:55:45   3  where T2.C1 = T1.C1
18:55:46   4  /

        C2
----------
       101
       102
       103
       104
       105

  .....
  ......

        C2
----------
       200

100 rows selected.

Execution Plan
----------------------------------------------------------
   0      SELECT STATEMENT Optimizer=ALL_ROWS (Cost=6 Card=100 Bytes=7
          00)

   1    0   MERGE JOIN (Cost=6 Card=100 Bytes=700)
   2    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (TABLE) (Cost=2 Ca
          rd=100 Bytes=500)

   3    2       INDEX (FULL SCAN) OF 'SYS_C0013059' (INDEX (UNIQUE)) (
          Cost=1 Card=100)

   4    1     SORT (JOIN) (Cost=4 Card=100 Bytes=200)
   5    4       TABLE ACCESS (FULL) OF 'T2' (TABLE) (Cost=3 Card=100 B
          ytes=200)

Statistics
----------------------------------------------------------
          1  recursive calls
          0  db block gets
         23  consistent gets
          0  physical reads
          0  redo size
       1393  bytes sent via SQL*Net to client
        562  bytes received via SQL*Net from client
          8  SQL*Net roundtrips to/from client
          1  sorts (memory)
          0  sorts (disk)
        100  rows processed

18:56:56 rel15_real_p>Select T1.C2
18:56:56   2  From T1, T2
18:56:56   3  where T1.C1 = T2.C1
18:56:58   4  /

        C2
----------
       101
       102
       103
       104
       105

  .....
  ......

        C2
----------
       200

100 rows selected.

Execution Plan
----------------------------------------------------------
   0      SELECT STATEMENT Optimizer=ALL_ROWS (Cost=6 Card=100 Bytes=7
          00)

   1    0   MERGE JOIN (Cost=6 Card=100 Bytes=700)
   2    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (TABLE) (Cost=2 Ca
          rd=100 Bytes=500)

   3    2       INDEX (FULL SCAN) OF 'SYS_C0013059' (INDEX (UNIQUE)) (
          Cost=1 Card=100)

   4    1     SORT (JOIN) (Cost=4 Card=100 Bytes=200)
   5    4       TABLE ACCESS (FULL) OF 'T2' (TABLE) (Cost=3 Card=100 B
          ytes=200)

Statistics
----------------------------------------------------------
          1  recursive calls
          0  db block gets
         23  consistent gets
          0  physical reads
          0  redo size
       1393  bytes sent via SQL*Net to client
        562  bytes received via SQL*Net from client
          8  SQL*Net roundtrips to/from client
          1  sorts (memory)
          0  sorts (disk)
        100  rows processed

-Pavan Kumar N

How to filter the result with a where clause clause?

Hello

I have a nice sql query. I would like to include a where clause with a joker clause.

If the user selects for example a "AGENT_ID", then where clause would include the AGENT_ID, otherwise, every thing would appear.

SELECT 
   "FICHE"."FICHE_ID" "FICHE_ID", 
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Hope I'm clear that English is not my mother tongue.

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Try this

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see you soon

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     , '' AS "Pharm/Tech"
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How to use the instruction box in where clause

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