Table of Contents
What is SQL transformation in Informatica?
SQL Transformation is a connected transformation used to process SQL queries in the midstream of a pipeline. We can insert, update, delete and retrieve rows from the database at run time using the SQL transformation. The SQL transformation processes external SQL scripts or SQL queries created in the SQL editor.
What are the Transformations in Informatica?
There are 3 Informatica transformations viz. External Procedure, Lookup, and Stored Procedure which can be unconnected in a valid mapping (A mapping which the Integration Service can execute).
What is Informatica PL SQL?
In pl/sql, you can have one table where you keep flags like “Yes” for lookup and then write the column on which you are looking up. And this way, if you have say 20 etl to be done. You write one time reusable code and its done. Whereas in informatica, you will have to code for 20 times for these 20 etls.
What are the modes for SQL transformation?
SQL transformation in Informatica runs in one of the following modes.
- Script mode: A SQL t/r running in a script mode runs the SQL scripts from the text files.
- Query mode: A SQL t/r runs the queries that you put in the SQL transformation in the mapping.
Is SQL transformation active or passive?
If you run the SQL transformation in script mode, then it becomes passive transformation. If you run the SQL transformation in the query mode and the query has a SELECT statement, then it becomes an active transformation.
How many types of transformations are there in ETL?
two ways
Transformation refers to the cleansing and aggregation that may need to happen to data to prepare it for analysis. Architecturally speaking, there are two ways to approach ETL transformation: Multistage data transformation – This is the classic extract, transform, load process.
Is PL SQL an ETL tool?
Strengths and weaknesses of using Oracle PL/SQL as an ETL tool. Costs – PL/SQL comes along with the standard Oracle licence and if an oracle database is installed, PL/SQL can be used straight away with no additional costs. No additional hardware is needed.
What is ETL in PL SQL?
ETL stands for extraction, transformation, and loading. During Extraction, the desired data has to be identified and extracted from many different sources, including database systems and applications.
What is active and passive transformation in Informatica?
An active transformation can change the number of rows that pass through the transformation. For example, the Filter transformation is active because it removes rows that do not meet the filter condition. A passive transformation does not change the number of rows that pass through the transformation.
What is difference between active and passive transformation?
An active transformation is a transformation which actually changes the physical position (alibi, elsewhere) of a point, or rigid body, which can be defined in the absence of a coordinate system; whereas a passive transformation is merely a change in the coordinate system in which the object is described (alias, other …
Is stored procedure an active transformation?
Stored Procedure Transformation in Informatica is a passive transformation and can be used in both connected and unconnected mode. The stored procedures are stored and run within the database and it also contains a pre-compiled collection of PL-SQL statements.
What are the 2 primary stages in data transformation?
Data transformation includes two primary stages: understanding and mapping the data; and transforming the data.
What is the difference between Router and filter transformation?
– Router transformation provides mutually inclusive groups to have the same records, whereas Filter transformation used to restrict the incoming record. – Router transformation doesn’t block the incoming record, whereas Filter transformation blocks or restricts the incoming record on the condition given.
What is upstream and downstream transformation in Informatica?
Downstream : This refers to all the applications/processes which are going to consume the output of ETL. Upstream: This refers to all the applications/processes which feed the data to be consumed by ETL.
How to create an informatica SQL transformation for an employee?
Please select the SQL Transformation and provide the unique name (SQL_Employee) and click on Create button Clicking the Create button will pop up a new window called Informatica SQL Transformation. Query Mode: Use this option to write Query directly inside the transformation.
How do I create a SQL transformation for a product?
Create a new mapping, drag the products source definition to the mapping. Go to the toolbar -> Transformation -> Create -> Select the SQL transformation. Enter a name and then click create. Select the execution mode as query mode, DB type as Oracle, connection type as static.
How does the SQL transformation work?
The SQL transformation processes external SQL scripts or SQL queries created in the SQL editor. You can also pass the database connection information to the SQL transformation as an input data at run time. The following SQL statements can be used in the SQL transformation. Mode: SQL transformation runs either in script mode or query mode.
How to create source qualifier transformation in Informatica?
Drag and drop the SP Source from Sources folder to the mapping designer. Once you drag the source, Power Center Designer will automatically create the Source Qualifier Transformation (default transformation) for you. To create SQL Transformation in Informatica, Please navigate to the Transformation menu and select the Create.. option