What is the use of aggregator transformation in Informatica?

Use the Aggregator transformation to perform aggregate calculations, such as averages and sums, on groups of data. task performs aggregate calculations, the task stores data in groups in an aggregate cache. To use the Aggregator transformation, you need the appropriate license.

Can you calculate aggregator transformation?

Aggregator transformation is an active transformation is used to performs aggregate calculations like sum, average, etc. For example, if you want to calculate the sum of salaries of all employees department wise, we can use the Aggregator Transformation.

How can we improve the performance of aggregator transformation in Informatica?

Use the following guidelines to optimize the performance of an Aggregator transformation:

  1. Group by simple columns.
  2. Use sorted input.
  3. Use incremental aggregation.
  4. Filter data before you aggregate it.
  5. Limit port connections.

Is aggregator an active transformation?

Aggregator transformation is an Active and Connected transformation. This Informatica transformation is useful to perform calculations such as averages and sums (mainly to perform calculations on multiple rows or groups).

Can we use joiner after aggregator?

To use joiner, you have to create dummy join ports first. After the aggregator, use an expression transformation to create a dummy output column with a hardcoded value “1”. You have to create two such expressions for A and B. Now connect them to a Joiner.

How do you get first and last record using aggregator transformation?

By using aggregator transformation, first and last aggregations.

  1. Jitendra. Answered On : Aug 23rd, 2013.
  2. You can get the First & last Record through Rank T/R bcz in Rank T/R it will filter numeric and string data.

Can we write non-aggregate functions in aggregator transformation?

Non Conditional clauses: You can also use non-aggregate functions in aggregator transformation.

What is the performance tuning techniques used for aggregator?

Use incremental aggregation to optimize the performance of Aggregator transformations. capture changes in the source and apply to the aggregator calculations and then updates the target incrementally, rather than processing the entire source and recalculating the same calculations every time you run the session.

Which guidelines are needful to Optimise the performance of an aggregator transformation?

Whitch guidelines are needful to optimize the performance of an Aggregator transformation? Use sorted input to decrease the use of aggregate caches. Limit connected input/output or output ports. INSTR( ‘Vivek’, ‘a’ ).

Can we connect 2 active transformations in Informatica?

You cannot connect multiple active transformations or an active and a passive transformation to the same downstream transformation or transformation input group. You might not be able to concatenate the rows.

How do you load first and last record into target table?

2 Answers

  1. From Source Qualifer (file) get all the records to Aggregator.
  2. In aggregator add Record number(RecNum) port and get the input of.
  3. Add port MinRecNum -> Expression min(RecNum)
  4. Add port MaxRecNum – > Expression max(RecNum)
  5. Put a filter after Aggregator with condition IIF(RecNum = MinRecNum.