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Tip: Extract a subset of data

You may have a large table, but only want to work with a subset it. For example, let's say you have a data set from the Canadian Census containing multiple rows of census data for all the major metropolitan areas of Canada. However, you'd like to work with only the top 5 areas. 


Once the large data table is in Fusion Tables, you can create this subset in two ways: filtering or merging. When the list of items you'd like to extract is long, try merging.  

Extract by filtering

In the New look, this is quite simple.

  1. Create a filter on the column containing the metropolitan area name. Sort by count and uncheck all other names.
  2. Choose File > Download.
  3. Select "Filtered rows" to obtain the filtered data.

In Classic:

  • Select View > Filter
  • Choose the column you'd like to filter on from the first drop-down menu. In this example, it's CMANAME.
  • Choose In from the operator drop-down menu. 
  • Enter a list of the area names, separated by commas. If the name has more than one word, surround the name with quotes.  In this example,
  • Click Apply
  • Select File > Download.

Extract by merging

Use the merge tables feature in Fusion Tables to create a table with just the subset of data that matches your top 5 list. 

  1. Create a Fusion Table that is a list of the data you want. Each value that matches rows you want in the final subset should be on a separate row. In our example, create a small .CSV file with a simple list of the cities you care about:
  2. Starting from this want-list table, merge it with the big table. 
  3. Choose File > Download if needed. 

The new table only contains rows from the larger data table that matched with your list.

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