ARCMAP-updating values in a column using Python

Overview: In the foreign language online, many people ask in arcmap how to modify the value of the attribute field through SQL, I see the answer to the people said through "Field Calculator", seemingly cannot directly through the SQL statement.

Although the study of GIS development, but still the first touch python, a bit of programming experience, so it is easy to get started.

Steps:

1, first create a field in attribute table through "table Options", "Add field".

2, right-click on the name of the column (field) and select "Field Calculator".

3. Select the "Python" tab and select the desired type. Tick "Show Codeblock" and define the Python function in "Pre-logic Script Code", and invoke the Python function in the text box below it.:

For a quick introduction to Python, ESRI's help is still good. Here are some references:

Ref:http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/calculate_field_examples/005s0000002m000000/

ARCMAP-updating values in a column using Python