- The Table Comparison transform compares two data sets and produces the difference between them as a data set with rows flagged as INSERT, UPDATE, or DELETE. It also allows you to detect and forward changes that have occurred since the last time a target was updated.
- In BODS 4.1, we can use filtering expressions in the Table Comparison transform to limit the rows that are compared to the input data set. Without filtering, all rows in the comparison table are considered for comparison against the input.
- It compares all the rows from the comparison table against the input data set. Each and every row in the comparison table is compared with the input table.
- Limits the rows from the comparison table that are considered for comparison against the input data set. In this screen shot, Comparison table “Key=3” is the only row compared against the input data set.