RE: ** is there PL/SQL for case

[Guang Mei]

Below is an example (with Oracle 8173), "case" works in sql, not in pl/sql.

 

Guang

 

 

[EMAIL PROTECTED]> create table t1  (name varchar2(30),  salary number );
 
Table created.
 
[EMAIL PROTECTED]> insert into t1 (name,salary) values ('Bill',   1000);
 
1 row created.
 
[EMAIL PROTECTED]> insert into t1 (name,salary) values ('George', 2000);
 
1 row created.
 
[EMAIL PROTECTED]> insert into t1 (name,salary) values ('Gore',   3000);
 
1 row created.
 
[EMAIL PROTECTED]> insert into t1 (name,salary) values ('Dick',   4000);
 
1 row created.
 
[EMAIL PROTECTED]> commit;
 
Commit complete.
 
[EMAIL PROTECTED]> select * from t1;
 
NAME                               SALARY
------------------------------ ----------
Bill                                 1000
George                               2000
Gore                                 3000
Dick                                 4000
 
[EMAIL PROTECTED]> select count(case when salary < 2000 then 1 else null end)  poor,
       count(case when salary between 2000 and 3000 then 1 else null end) middle_class,
       count(case when salary > 3000 then 1 else null end)  rich 
from t1;    
 
      POOR MIDDLE_CLASS       RICH
---------- ------------ ----------
         1            2          1
 
[EMAIL PROTECTED]> declare
  c1 number;
  c2 number;
  c3 number;
begin
  select count(case when salary < 2000 then 1 else null end)  poor,
         count(case when salary between 2000 and 3000 then 1 else null end) middle_class,
         count(case when salary > 3000 then 1 else null end)  rich 
  into c1,c2,c3   
  from t1;
end;
/  

  select count(case when salary < 2000 then 1 else null end)  poor,
               *
ERROR at line 6:
ORA-06550: line 6, column 16:
PLS-00103: Encountered the symbol "CASE" when expecting one of the following:
( * - + all mod null <an identifier>
<a double-quoted delimited-identifier> <a bind variable> avg
count current distinct max min prior sql stddev sum unique
variance execute forall time timestamp interval date
<a string literal with character set specification>
<a number> <a single-quoted SQL string>
 

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of A Joshi
Sent: Thursday, August 07, 2003 4:55 PM
To: Multiple recipients of list ORACLE-L
Subject: RE: ** is there PL/SQL for case

Guang,

  Thanks for your help. Do you have an example you can send me. I thought whatever one can do in sql one can do in pl/sql. meaning sql is a subset of pl/sql. Correct me if i am wrong. Thank You.

Guang Mei <[EMAIL PROTECTED]> wrote:

I am not sure in 9i. But in 8i I think you can use "case" in sql but not in pl/sql. You have to use if elsif in pl/sql.

 

Guang 

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of A Joshi
Sent: Thursday, August 07, 2003 4:24 PM
To: Multiple recipients of list ORACLE-L
Subject: ** is there PL/SQL for case

Hi,

  Is there a statement in pl/SQL like case or is if elsif the only way. Meaning if I need to transalate state depending on input number as follows :

 

1 - CA

2 - OR

3 - WA

4 - AR

 

Can I have one statement like case 'state# :

 

1: state := 'CA'

2: state := 'OR'

 

etc.

 

or do i have to do :

 

IF state# = 1 THEN

  state := 'CA';

ELSIF state# = 2 THEN

  state := 'OR';

 

etc

 

Thank You.

 

 

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