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14th Day

Merge Join T/r:

* This t/r is used to join 2 sources with dissimilar structures based on a joining condition.

*Difference between merge and merge join is

1) Here M-J joins sources with dissimilar structures.

2) Both t/r's should have at least one  common column and that in sorted order and of same datatype

3)Here we can implement inner join , left join , right join.

Ex: Take a flat file source and table as emp , oledb source table as dept , convert the dno column into same datatype and give the o/p's of sources  to sort t/r and from sort to merge join, to at last oledb destination.

Audit T/r:

* It adds some new column's like package name, task name, machine name, user name and execution time as o/p to the available i/p columns.

Ex: Try with a flat file source, link it to audit t/r.

Row Sampling and Percentage Sampling T/r:

* This t/r is used to generate specified number/percentage of random records from the source.

* It takes single i/p and gives 2 o/p's Sample records and Unsample records.

* To generate same random records for the next run use the seed value.

Ex: try with a oledb source. also try copy column t/r.

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