The following table shows three fields of a land use layer with 10 polygons. The
ID: 3607376 • Letter: T
Question
The following table shows three fields of a land use layer with 10 polygons. The following questions relate to a series of queries in continuous sequence.
You set up the expression, lucode = 200, and click "Create a new selection." How many records are selected? _____________
Next, you set up the expression, costha >= 15000, and click “Add to current selection.” How many records are selected? _____________
Next, you set up the expression, hectare > 2.0, and click “Select from current selection.” How many records are selected? _____________
Next, you click “Switch selection." How many records are selected? ____________
Next, you set up the expression, lucode = 200 OR hectare > 10, and click “Create a new selection.” How many records are selected? ____________
Lucode
Costha
Hectare
200
20000
4.57
400
10000
10.50
300
10000
3.31
300
10000
0.44
300
10000
0.10
300
10000
0.72
200
15000
1.10
300
10000
0.19
200
15000
0.75
200
15000
0.78
Lucode
Costha
Hectare
200
20000
4.57
400
10000
10.50
300
10000
3.31
300
10000
0.44
300
10000
0.10
300
10000
0.72
200
15000
1.10
300
10000
0.19
200
15000
0.75
200
15000
0.78
Explanation / Answer
You set up the expression, lucode = 200, and click "Create a new selection." How many records are selected? 4 records
Next, you set up the expression, costha >= 15000, and click “Add to current selection.” How many records are selected? 8 records(4 + 4 current selection)
Next, you set up the expression, hectare > 2.0, and click “Select from current selection.” How many records are selected? 3 records
Next, you click “Switch selection." How many records are selected? 7 records
Next, you set up the expression, lucode = 200 OR hectare > 10, and click “Create a new selection.” How many records are selected? 5 records
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