The main differences between the SQL Selector operator and the Export operator are seen in their performance and feature sets.
- The Export operator allows multiple sessions and multiple instances to extract data from the database. When exporting a large number of rows, it is usually better to use the Export operator.
- The SQL Selector operator only allows one session and one instance to extract rows from the database. When exporting a small number of rows, the SQL Selector operator usually performs better than the Export operator.
The SQL Selector operator support of a single session and a single instance is similar to a BTEQ Export operation.