In the case where your
data already includes unstructured text that you want to analyze,
the data builder can add a unique numeric key as a column in the table.
For example, many data tables include a text column for comments.
Using text analysis, you can look for trends or themes within these
comments. The text analysis in SAS Visual Analytics requires a unique
numeric key to reference the data sources.
To add a unique numeric
key to a table:
-
-
Add the columns to include
in the text analysis by clicking the column name in the table in the
workspace.
-
In the
Column
Editor, right-click on the first row in the table, and
select
Add Generated Key Column.
A column that is named
GENERATED_ID is
added to the table.
-
Specify an output table,
library, and location.
-
Save and run the data
query.
When you run the data
query, the
GENERATED_ID column
begins at zero and increments for each row in the source table. If
you select the
Append data check box on the
Properties tab,
the data query increments from the current maximum value.
If the data that you
want to use is already in memory on SAS LASR Analytic Server,
then performing the previous steps results in the following sequence
of data movements:
-
The data is read from memory on SAS LASR Analytic Server
and transferred to the SAS Application Server.
-
The data query runs and adds the
generated key column.
-
The data is transferred back to SAS LASR Analytic Server
in a new table.
You can avoid these data movements by adding the generated
key column before loading the table to memory on SAS LASR Analytic Server.