9. Simple Nested Expression for TADB List Group Attributes
Purpose
Determine the number of specified parts.
Assumptions
There is one List group (in the expression), defined as follows.
Parts | Attributes include quantity, id. |
Query Expression
Parts(id=’id1’).quantity
Where
Criteria | Is/are the: | |
id | Nested Parts list group attribute | (Parts.id) |
'id1' | Part name | |
quantity | List group attribute |
Query Expression says:
Return the quantity of id1 parts.
Query Expression Results
The results for the above attribute list might look like this:
1 | 55 |
The quantity of the part id1 is 55.
Note: Anything you can do in the sub-expressions mentioned in section 3 can be done in these sub-expressions.