2011

Table Of Contents

For example, after you join a table of voter turnout data to a map of regions

in your area, you can create a theme that varies in appearance, depending on

the number of participating voters in each region.

With joins, you can keep your data in separate tables, focused on specific

topics, instead of in one large database or file. This can ease administration

and reduce complexity.

Typically, a join connects a separate table of data (a secondary table) to a

feature class layer (the primary table). The most common type of join is a

one-to-one join, which connects one record in a table of data to one feature

in a feature class.

Typically, you join data tables from an application such as Microsoft Access

to FDO layers from SDF, SHP, Oracle, and ArcSDE data. However, you can also

join feature sources such as SHP to other feature sources.

Tell me more

Video

■ Show me how to join attribute data to

features.

■ Show me how to manage joins.

Procedure

■ Create a join. (page 512)

Tutorial

■ Lesson 2: Analyze Data With External

Information Using Joins

Workflow

■ Join Attribute Data to a Geospatial

Feature

GIS Skill

■ Join attribute data to features