Filter condition refers to data fields relational expressions from the different data tables.
Steps:
1. Select intended data table name from the "Category" column; then double click it.
2. Construct Input Expressions
3. Click "Verification" to verify the expressions.
4. If there is not error prompted, then click [OK] to finish.
Note:
If there is a Constant Value needs to be selected, then a single quote is required to use.