Presented by Maneesh Sharma at the WVAGP membership meeting on 3 Nov 2011 in Charleston, WV.

1. Maneesh Sharma
West Virginia GIS Technical Center
Department of Geology and Geography
West Virginia University
Morgantown 26505
Maneesh.Sharma@mail.wvu.edu

2.  Queries in feature classes
◦ Attribute Query
 Demonstration
◦ Location Query
 Demonstration
 Query in Data driven Pages
◦ Dynamic query
 Demonstration
 Questions

3.  Attribute Query
◦ “A query that extracts data/features from a layer
based on the value of its attribute data”
 Query can be
◦ Simple query
◦ Compound query
 Subquery

4.  A query expression needs 3 components
◦ Attribute Field Operator Field Attribute Value
"AssessedAcres" >= 0.19
◦ The result will show a set of selected features

5.  Different types of operators can be used
 Calculations can be done
◦ "AssessedAcres" >= 0.12 * 100
Or
"Perimeter" >= "Acres" * 10

6.  Multiple attribute and operators can be used
to create compound query
◦ Complex expressions can be created by using AND
or OR
"Perimeter" >= 7361.83 or "Acres" <= 0.35

7.  A subquery is a nested query
 Supported just by geodatabase data sources
only
 Will NOT work with shapefiles
"Entity" NOT IN (SELECT "ENTITY" FROM
BLDTYPES2)
 Demonstration

8.  A location query is based on their location
relative to other features that meet certain
conditions
 Main types
◦ Near
◦ Intersect
◦ Inside

9.  Three things needed for query
◦ Layer that contains features you want to select
◦ Location relationship that needs to be analyzed
◦ Layer that contains related features
 “Building types within 2000 ft of selected
parcel”
 Demonstration

10.  Each layer can take advantage of the Data
Driven Page setup
 Layer has to have the page number from the
index layer associated with the features
 By setting the Page Definition by using page
number, you can show or hide each feature
on the map

11.  Demonstration