Skip to main content

3rd class

**ETL operations- extract business data from op s/m and make necessary
     transformations and Load the data

**ETL tools are used perform etl operations.

**This can be done using

1) Using GUI based tools: only drag and drop can be used to perform ETL
    operations no need to write code
   Ex: Informatica, Data stage, Oracle ware house builder, SSIS.

2) Using code based tools: Name itself specify
   Ex:SAS ETL tools, Teradata utility tools.

** ETL lifecycle:

1st stage loading into staging tables w/o any transformations

2nd stage loading into dataware house tables with necessary tran...s.


Comments

Post a Comment

Popular posts from this blog

Lesson 57: Auto refresh the report in SSRS

                     How to Auto refresh the report in SSRS. Firstly create a datasource,dataset and select the required fields into the table/matrix. If you want to refresh the report frequently for every second you can change the Auto refresh as 1 in the properties of the report. If you want to change the color of a field after given period of time to change the expression of the color in properties as a follows and set the Auto refresh time to the required period of time in the report properties.
Post a Comment
Read more

12th Day

Conditional statement in SSIS: same as ternary operator in C ** <condition>? <true>:<false> Eg: Gender=="M" ? "Male": "Female" Multicast Transformation : This t/r creates multiple copies of i/p data. it is useful because every time we need not to go to source. ** This will improve task performance. Aggregate Transformation : It is used to convert the detailed values into aggregated data by using Aggregate functions like sum,avg,max,min,count etc. ** It is Asynchronous transformation. Example: to the i/p data from source group by deptno and perform aggregate funcs. Conversion in SSIS ; * Conversion is very important because data from flat file, excel comes to transformations in the form of string(varchar) , so we cannot perform required operations so it require to convert data. 1) Directly at source level : ** Select flat file source, right click--> show advanced editor. ** Select i/p & o/p properties tab, ...
Post a Comment
Read more

Lesson 60: Create folders and Data sources by Report Manager in SSRS

How to create folders and Data sources by using Report Manager in SSRS Firstly select the report manager URL from reporting services configuration and go to the reporting services home. Next click on New Folder option and create a folder for data sources, also create various folder for Data Sets and Reports. Now click on the Details view in order to move or delete multiple reports at once. For creating a New Data Source click on the New Data source in the Home and provide the connection string, also connect using a service account so that we can provide access to that service account and every one uses that service account for connecting to the database. Finally after adding/deploying a report, select manage from the dropdown and choose the correct datasource .
Post a Comment
Read more