What are external content tables and how can they be used instead of fts3 virtual tables for Full Text Search? Is it worth to use fts4 instead of fts3?
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What specific part of [the documentation](http://www.sqlite.org/fts3.html#*fts4content) do you not understand? – CL. Jul 20 '16 at 17:59
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I am not understanding how external content table avoid duplicate copies of data – Bhushan Jul 21 '16 at 12:20
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See [shadow tables](http://www.sqlite.org/fts3.html#*shadowtab). – CL. Jul 21 '16 at 12:25
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So it does copy the data for specified columns? But the documentation says that external content table can access the columns that it does not have. but I cannot figure out how to use it? – Bhushan Jul 21 '16 at 12:38
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There are examples. – CL. Jul 21 '16 at 12:42
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Wait just read the example. it says that it takes data from the content table when requested. So it does not copy the data. Am I correct? – Bhushan Jul 21 '16 at 12:45