11.5 Recursively get field values
Calculate total sale amount in the year 2014 based on JSON-format sale data. Below is part of the JSON file:
[
{"YEAR":2013,"MONTH":7,"SALES": [
{"ID":10248,"CUSTOMERID":"VINET", … ,"SALES":2440},
{"ID":10249,"CUSTOMERID":"TOMSP", … ,"SALES":1863.4},
{"ID":10250,"CUSTOMERID":"HANAR", … ,"SALES":1813.0},
…
]},
{"YEAR":2013,"MONTH":8,"SALES": [
{"ID":10270,"CUSTOMERID":"WARTH", … ,"SALES":1376.0},
{"ID":10271,"CUSTOMERID":"SPLIR", … ,"SALES":48.0},
{"ID":10272,"CUSTOMERID":"RATTC", … ,"SALES":1456.0},
…
]},
…
]
SPL uses A.field@r() function to get field values recursively.
SPL script:
| A | |
|---|---|
| 1 | =json(file(“sales.json”).read()) |
| 2 | =A1.select(YEAR==2014) |
| 3 | =A2.field@r(“SALES”) |
| 4 | =A3.sum(~.sum()) |
A1 Import the JSON file.
A2 Get sale records of the year 2014.
A3 Use A.field@r() function to get SALES field values recursively.
A4 Calculate sale amount in each month of the year 2014 in loop and calculate the total.
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