Comments on: How to use LIKE operator in DECODE function http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/ Oracle Question and Answer Sat, 07 Aug 2010 04:48:56 -0600 http://wordpress.org/?v=2.8.4 hourly 1 By: Claudiu Ariton http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/comment-page-1/#comment-189 Claudiu Ariton Fri, 23 Jun 2006 09:26:11 +0000 http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/#comment-189 Hello, In 8i version: select (case when 1=1 then 1 else 0 end) test from dual; - works in SQL, but not works in PLSQL 1 declare 2 cursor c is select (case when 1=1 then 1 else 0 end) test 3 from dual; 4 begin 5 null; 6* end; SQL> / cursor c is select (case when 1=1 then 1 else 0 end) test * EROARE la linia 2: ORA-06550: line 2, column 21: PLS-00103: Encountered the symbol "CASE" when expecting one of the following: ( - + mod not null others Thank you, Claudiu Hello,

In 8i version:

select (case when 1=1 then 1 else 0 end) test from dual; – works in SQL, but not works in PLSQL

1 declare
2 cursor c is select (case when 1=1 then 1 else 0 end) test
3 from dual;
4 begin
5 null;
6* end;
SQL> /
cursor c is select (case when 1=1 then 1 else 0 end) test
*
EROARE la linia 2:
ORA-06550: line 2, column 21:
PLS-00103: Encountered the symbol “CASE” when expecting one of the following:
( – + mod not null others

Thank you,
Claudiu

]]> By: Laurent Schneider http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/comment-page-1/#comment-188 Laurent Schneider Mon, 19 Jun 2006 18:00:45 +0000 http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/#comment-188 [code] select decode(substr(ename,1,1),'A','stringA','M','stringM') from emp; [/code] in this case [code]
select decode(substr(ename,1,1),'A','stringA','M','stringM') from emp;
[/code]

in this case

]]> By: TMoore http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/comment-page-1/#comment-187 TMoore Sun, 18 Jun 2006 20:46:28 +0000 http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/#comment-187 When I have to write huge DECODE a translate it into CASE. It's much more flexible. It was in 8i too, try it ( Some people said it wasn't CUBE, ROLLUP in 8i It was myth) For more then 3 condition statement i use CASE, for simple 2 conds DECODE is quicker to write. .. select case when name like 'A%' then 'String begin with A' when name like 'M%' then 'String begin with M' end as 'result' from emp / cheers When I have to write huge DECODE a translate it into CASE.
It’s much more flexible.
It was in 8i too, try it ( Some people said it wasn’t CUBE, ROLLUP in 8i It was myth)
For more then 3 condition statement i use CASE, for simple 2 conds DECODE is quicker to write.

..

select
case
when name like ‘A%’ then ‘String begin with A’
when name like ‘M%’ then ‘String begin with M’
end as ‘result’
from emp
/

cheers

]]> By: Laurent Schneider http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/comment-page-1/#comment-185 Laurent Schneider Thu, 01 Jun 2006 19:05:45 +0000 http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/#comment-185 do you really need it? translating "like" in multiple instr is possible, but I advise you to upgrade to a supported release of Oracle (for example 10gR2) do you really need it? translating “like” in multiple instr is possible, but I advise you to upgrade to a supported release of Oracle (for example 10gR2)

]]> By: Claudiu Ariton http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/comment-page-1/#comment-184 Claudiu Ariton Thu, 01 Jun 2006 10:28:36 +0000 http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/#comment-184 Hello, You are rigth but .... The CASE operator is not working in Oracle 8i version and the INSTR function is limited than DECODE. Try to re-write the query like this with INSTR function: Select decode(NAME, (select name from dual where name like 'A%R_D_E%'), 'ARDE', (select name from dual where name like 'M%'), 'M',null) From EMP; Claudiu Ariton Hello,

You are rigth but ….
The CASE operator is not working in Oracle 8i version and the INSTR function is limited than DECODE. Try to re-write the query like this with INSTR function:

Select
decode(NAME, (select name from dual where name like ‘A%R_D_E%’), ‘ARDE’,
(select name from dual where name like ‘M%’), ‘M’,null)
From EMP;

Claudiu Ariton

]]> By: Laurent Schneider http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/comment-page-1/#comment-183 Laurent Schneider Thu, 01 Jun 2006 09:35:54 +0000 http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/#comment-183 or with case select ename, case when ename like 'A%' then 'A' when ename like 'M%' then 'M' end from emp; or with case

select ename,
case
when ename like ‘A%’ then ‘A’
when ename like ‘M%’ then ‘M’
end
from emp;

]]> By: Laurent Schneider http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/comment-page-1/#comment-182 Laurent Schneider Thu, 01 Jun 2006 09:33:59 +0000 http://oraqa.com/2006/04/12/how-to-use-like-operator-in-decode-function/#comment-182 select ename, decode(instr(ename,'M'),1,'M', decode(instr(ename,'A'),1,'A')) from emp; select
ename,
decode(instr(ename,’M'),1,’M',
decode(instr(ename,’A'),1,’A'))
from emp;

]]>