Hello Tabraiz, As another option, in the XTools Pro extension to ArcGIS there is a couple of tools that you could use for this task. - Using Copy Layer Properties: create the required query for one layer, then just copy definition query property from this layer and paste to other layers. - There is also Definition Query Manager tool allowing to manage queries for all layers in one place, this may also facilitate working with queries for many layers. Hope this may help, Andrei
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