2.5 Logical AND
Perform logical AND operation at aggregation on a sequence made up of boolean values. One task is to find if all students have access to cell phones in online classes based on the following primary school online teaching terminal survey table.
| ID | STUDENT_NAME | TERMINAL |
|---|---|---|
| 1 | Rebecca Moore | Phone |
| 2 | Ashley Wilson | Phone,PC,Pad |
| 3 | Rachel Johnson | Phone,PC,Pad |
| 4 | Emily Smith | Phone,Pad |
| 5 | Ashley Smith | Phone,PC |
| 6 | Matthew Johnson | Phone |
| 7 | Alexis Smith | Phone,PC |
| 8 | Megan Wilson | Phone,PC,Pad |
| … | … | … |
SPL script:
| A | |
|---|---|
| 1 | =T(“survey.xlsx”) |
| 2 | =A1.(TERMINAL.split@c().pos(“Phone”) > 0) |
| 3 | =A2.cand() |
A1 Load data table.
A2 It is true when a TERMINAL field value contains Phone.
A3 Use cand() function to check if every member of A2’s sequence is true.
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