Answer / venkateshmalneni

EXIST is used as conditional operator in which u can write a query
IN is also used as a conditional operator in which we gives a list of elements

Answer / moorthy g

select ename from emp e
where mgr in (select empno from emp whereename = 'KING');

Here's the EXPLAIN PLAN for this query:

OBJECT OPERATION
---------- ----------------------------------------
SELECTSTATEMENT()
NESTEDLOOPS()
EMP TABLEACCESS(FULL)
EMP TABLEACCESS(BY INDEX ROWID)
PK_EMP INDEX(UNIQUESCAN)

This query is virtually equivalent to this:

select e1.ename from emp e1,(select empno from empwhere
ename = 'KING') e2
where e1.mgr = e2.empno;

You can write the same query using EXISTS bymoving the outer
query column to a subquery condition, likethis:

select ename from emp e
where exists (select 0 from emp wheree.mgr = empno and
ename = 'KING');

When you write EXISTS in a where clause, you'retelling the
optimizer that you want the outer query to be runfirst,
using each value to fetch a value from the inner
query(think: EXISTS = outside to inside).

Answer / sujeetha

It is almost similar to IN but the difference is that in
EXIST it will retrive the row atleast one row in the inner
query satisfies but in IN we can have manuy values

Answer / pavan_615

IN- sub Query - it will be executed once for the full query
Exist - Co-related sub Query - it will be executed for each
row.-- exist will me faster when you are working with big
tables.

I have scenario, i have 10 worklflows and i want run the 1st workflow first and immediately i want to run 10th workflow has to run and am not bothering of 2 to 9 workflows? can any one help me how to do this? Thanks in advance.....

4 Answers   Patni,

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What is confirmed dimension?

3 Answers  

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I need the output file in the below format using Informatica. __0946684800__ 6 1 3 1 5 1 6 1 10 1 6 10 Pos State Time Split AgentID Reason Spaces Code in Code Spare state ______ ___ _____ ______ __________ ______ 1234 14 0 4321 3103 abcd 4321 15 5 123452 3150 Can someone help please?? We need the data in space-delimited, fixed ASCII format .

0 Answers   Amazon,

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hi all my source looking like below column1 column2 101,102,103 abc,def,ghi 1001,1002,1003 a,b,c i want my target is column1 column1 101 abc 102 def 103 ghi 1001 a 1002 b 1003 c any one can you help

1 Answers  

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i have 2 flat files one table contains duplicates another one no duplicates.... so i need like this i don't want duplicates...pl's give me ans...

4 Answers   Keane India Ltd,

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Suppose we have a (assume relational) source table Product_Id Month Sales 1 Jan x 1 Feb x . . . . . . 1 Dec x 2 Jan x 2 Feb x . . . . . . 2 Dec x 3 Jan x 3 Feb x . . . . . . 3 Dec x . . . . . . and so on. Assume that there could be any number of product keys and for each product key the sales figures (denoted by 'x' are stored for each of the 12 months from Jan to Dec). So we want the result in the target table in the following form. Product_id Jan Feb March.. Dec 1 x x x x 2 x x x x 3 x x x x . . So how will you design the ETL mapping for this case , explain in temrs of transformations.

5 Answers   Accenture, VAMA,

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Can you copy the session to a different folder or repository?

2 Answers  

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How to load the source table into flat file target(with columns) in informatica?

4 Answers   Accenture,

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Name 4 output files that informatica server creates during session running?

1 Answers  

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What are the informatica performance improvement tips

0 Answers   Informatica,

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Hi, In source I have records like this No name address 10 manoj mum 10 manoj dilhi 20 kumar usa 20 kumar Tokyo I want records in target like shown below No name addr1 addr2 10 manoj mum dilhi 20 kumar usa Tokyo If it is reverse we can do this by using Normalizer transformation by setting occurance as 2. Somebody will say use denoralization technique. But as of my knowledge I couldn’t find any denormalization technique. Is there any concept like that? I tryid this seriously but I could find any idea to implement this. Can any one please help me ? Advance Thanks

6 Answers   IBM,

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why we use informatica in our project?

2 Answers   TCS,

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