Before you load data from BigQuery, add a BigQuery data source.
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Click the button in the toolbar to insert a code snippet in a new code cell and automatically execute it. 
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Once Code Assist has been initialized, hover over the icon appears. to open a popup menu. Select the Load Data item from the menu.   
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Select the BigQuery data source which was created earlier.   
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Specify the project, region, dataset and table that you want to load. Click the button. Code Assist inserts code into the next cell and immediately executes it.   

