Surrogate Key Generator In Datastage 8.1 With Example
Posted : admin On 18.04.2020- Surrogate Key Generator In Datastage 8.1 With Example Pdf
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When using the Surrogate Key Generator Stage with Database Sequence, please note that before using the sequence values:
This will ensure the Datastage to create and remove the Surrogate key file everytime you run the job Now coming to the Transformer NextSurrogateKey function mapped against your target field which is supposed to generate the SK sequence will retrieve the value from the file.
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Answer / murali. Yes ur right but we have another way to generate s key by using transformer.in transformer we have a surrogate key tab click the skey tab in that we hav state file and db sequence. Answer / suresh. Surrogate key is alternate to primary key,it allows duplicates also,while maintain the hystorical data we use surrogate key. For example, a table that includes information on employees may use Social Security Number as the primary key. This type of key is called a natural key. The second is to use a new field with artificially-generated values whose sole purpose is to be used as a primary key. This is called a surrogate key. A surrogate key has the following. May 30, 2014 5) It is not visible to end users. End users should not see a surrogate key in a report. I will not go in details of surrogate key, I will post it later, But we will see how to generate surrogate keys in DataStage. Encryption key generator. You can use a Surrogate Key Generator stage to perform the following tasks: Create or delete the key source before other jobs run.
CYCLE: Specify CYCLE to indicate that the sequence continues to generate values after reaching either its maximum or minimum value. After an ascending sequence reaches its maximum value, it generates its minimum value. After a descending sequence reaches its minimum, it generates its maximum value. | Specify NOCYCLE to indicate that the sequence cannot generate more values after reaching its maximum or minimum value. This is the default. |
Supplier_Key | Supplier_Code | Supplier_Name | Supplier_State |
123 | ABC | Acme Supply Co | CA |
Supplier_Key | Supplier_Code | Supplier_Name | Supplier_State |
123 | ABC | Acme Supply Co | IL |
Supplier_Key | Supplier_Code | Supplier_Name | Supplier_State | Version |
123 | ABC | Acme Supply Co | CA | 0 |
124 | ABC | Acme Supply Co | IL | 1 |
Supplier_Key | Supplier_Code | Supplier_Name | Supplier_State | Start_Date | End_Date |
123 | ABC | Acme Supply Co | CA | 01-Jan-2000 | 21-Dec-2004 |
124 | ABC | Acme Supply Co | IL | 22-Dec-2004 |
Surrogate Key Generator In Datastage 8.1 With Example Pdf
- Source file that comes from the OLTP sources
- Old dimesion refernce table link
- The SCD stage
- Target Fact Table
- Dimesion Update/Insert link
- Generation the new Surrogate key values to be passed to the dimension and fact table
- Mapping the source columns with the source column
- Setting up of the expired values for the old rows
- Defining the values to mark the current active rows out of multiple type rows