Answer / pari

Decode
1.It’s a function
2.can compare only discrete vaules
3.Pl/Sql standards
4.cannot process null

Case
1.It's an Expression
2.can hande range values
3.ANSI Standards
4.Processing time is faster when compared to Decode
5.can process null

Answer / judith

Decode
The default operator for comparison is '=',
for e.g select deptno,decode
(deptno,10,'dept10',20,dept20,default)

so if the deptno=10 then the value is replaced by dept10
and so on,

whereas in Case:

we can use any operator other than '=',
for e.g
select deptno,
case when deptno=10 and sal>1000 then 'dept10'
else
'dept20'

Hope the difference is made clear.

Regards,
Judith

Answer / vasu

Decode: using for reporting purpose. and it is implemented
by if stmt.
Ex: select decode(job,'CLERK','executive',job) from emp;

Case : implemented by if & elsif condition. it is using
pl/sql equality conditionality.
Ex : select case job='CLERK' then 'executive' else 'no' end
a from emp;

it is also used for multipul colms & multi conditions.

in above stmt a is reffered alias name.

Answer / suman vyas

1) Case Can work with logical operator other than '=' . such as < , > , = < , >=
where Decode performs an equality check only.

2) Decode can work as function inside SQL only,
where Case can work in Pl/Sql as a substitute of IF-THEN-ELSE.

3) Decode can not process Null , where Case can process Null.

4) Case expects datatype Consistency, Decode Dose not.

5) Decode is a function, where Case is a statement.

hope this will give u satisfied Answer for Difference Between CASE AND DECODE.

Thanks
Suman Vyas

Answer / satishe

Decode and Case functionwill work in the same way.the only
difference is we can write conditions in side the case
function.
for Ex;
case(if c>d,d...)
decode(job,'clerk'...)

Answer / gurujothi

*CASE can only be used inside the SQL statement where as CASE can be used anywhere even as a parameter of a function or procedure.
*Decode can do equality check only but Case can do more logic comparisons such as <,>etc.,
*The Case will handle NULL differently

Answer / zeya.ocp

CASE Expr make u use IF-THEN-ELSE logic in sql statements without to invoke procedure.It complies with ANSI SQL.
DECODE function decode an expr in a way similar to IF-THEN-ELSE logic that is used in various languages.it facilitate conditional inquiries.

Answer / neeraj

Can anyone explain me Null value handle by Case & Decode with Example.

What is the difference between the Bo 3.0 and 3.1?

1 Answers  

Is it possible to create a new calendar using BO? Ex:- Wants to create a calendar where the year starts with the 1feb - 25Feb. Next month from 26Feb - 14Mar.

1 Answers  

1. what is the purpose of creation of universe than other data sources ? 2. which is the best method in performance tuning techniques ?

3 Answers  

Explain about derived tables?

2 Answers   Cap Gemini,

HOW DO YOU RESOLVE MULTIVALUE AND COMPUTATIONERROS?

2 Answers  

Explain when to use local filter and when to use global filter?

0 Answers  

@prompt('message',['type'],[lov],[mono/multi], [free/constraint]) what is Constraint?

4 Answers   iGate,

can we create aliases for every table beforehand? if yes whar are the disadvantages?

5 Answers   AG Technologies,

How to get top 5 rows of a selected column?

3 Answers   Patni,

Please Send to my e-mail Interview Questions With Answers , Technical Test Questions With Answers and Code Snippets Of Business Objects - Dev , Business Objects - Reporting Analysis .

3 Answers   AOL,

how to make a report avilable to other users?

2 Answers  

How to create a report template BO XI R2

2 Answers   Infosys, LBM,