Query Layers allow you to read (not write) spatial data directly from spatial

databases, such as Oracle Spatial & Graph. Using Query Layers does not require

the use of ArcSDE, which eliminates the licensing and setup concerns typically

associated with ArcSDE. This example uses Oracle MVDEMO dataset that can be

downloaded from the Oracle Technology Network.

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Using Query Layers in ArcMap for Oracle Spatial & Graph

Before You Begin

The computer running ArcMap must also have the Oracle

Client installed on it.

The data to be viewed in a Query Layer must be validated

through Oracle Spatial & Graph before use.

Using Query Layers

1. Open ArcMap.

2. Start the Query Layer wizard (see screen #1).

3. Either

Select the appropriate connection from the dropdown box

–or–

Create a new connection by clicking the Connections

button and then clicking the New button in the dialog that

opens.

4. Make the following selections and entries in the dialog (see

screen #2):

Database Platform: Oracle

Instance: your instance name

Authentication: Database authentication

Username: mvdemo

Password: mvdemo

5. Click OK two times to return to the New Query Layer dialog.

6. You will now see your new connection and a list of spatial

tables you have access to. Either:

Double click the table you want to work with from the list,

and ArcMap will build a query for you –or–

Create your own custom query using SQL.

7. Enter the name you want to use for the layer in ArcMap.

8. Click the Validate button.

If any errors are returned from validation, the layer will not

work in ArcMap.

If the data validates, click Next.

9. In the next window, select the unique identifier column for

the table by checking the box next to it.

10. Click Finish.

11. You will be returned to ArcMap once the extent of the layer

is calculated and can now use the Query Layer as you would

use any other layer in ArcMap (screens #3, #4 and #5).

Additional Resources

Query Layers documentation from ESRI

Query Layers video tutorial from ESRI

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