we hava more than 1000 records. i have to select first 5
record, last 5 record and 5 records from middle of the source.
how can i do in oracle as well as in informetica??
- 4 Answers
- 7278 Views
- I also Faced
- E-Mail Answers
Answer Posted / babu
Hi All,
ORACLE:
========
Below SQL query will give the exact result of what you
people are expecting.
SELECT rownum num,e.* From Emp e Where Rownum<=5
Union
SELECT * From
(SELECT Rownum Num,E.* From Emp E)
Where Num BETWEEN (SELECT round(Count(*)/2) From Emp)AND
(SELECT round(Count(*)/2) +1 From Emp)
Union
SELECT * From
(SELECT rownum num,e.* From emp e)
Where Num <=(SELECT count(*) From Emp)
And
Num>(SELECT count(*)-5 From Emp)
INFORMATICA:
============
please find the below mapping for your scenario.
SRC==>SQ==>(1)EXP==>AGG=====JNR===>RTR==T1,T2,T3
|| ||
(2)EXP==========
1> In first expression having the all columns coming from
the source and two extra columns(output ports)
I.one for sequence numbers.
II.second one is for constant value
2> In aggregatation transformation count the number of
records based(GROUP BY)on the dummy port.
3> In joiner transformation join the two flows(AGG and Exp
the join column is dummy port)
4> create 3 groups in Router transformation for 1St 5
records,Latst 5 records and Middle 5 records
GRP1::sno<=5
GRP2::sno<=cno+2 and sno>=cno-2 /*cno=count(*)*/
GRP3::sno<=cno and sno>cno-5
Cheers,
Babu rao
| Is This Answer Correct ? | 3 Yes | 1 No |
Post New Answer View All Answers
Give a way in which u can implement a real time scenario where data in a table is changing and u need to look up data from it.How will u configure the look up transform for this purpose?
how to do aggregation (year wise quantity ) using only source qualifier, the source is sql server date as datetime data type and target as flat file with year (string datatype)
what is the use of structures?how many nodes can u create in a structure?
explain the methodology of Data Warehousing?(Polaries)
What are various etl tools in the market?
Assume u have a 24CPU machine with 24GB RAM, suggest how u would like to configure Informatica ,like number of concurrent sessions, RAM requirements etc,max partitions that u would permit per mapping.
Explain what are the various etl tools in the market?
What is virtual Data Warehousing?
what is the difference steps for data modeling?
What is full load & incremental or refresh load?
what are the concerns of OLTP and DSS systems?
Hi, can anyone plz share the project architecture for etl testing(banking domain) plz explain the architecture .
give detail on the sales project how many number of dimensions & fact tables are used in projec briefly. how the four fact tables taken in the project.
What are the etl testing operations includes?
How many steps etl contains?
