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I searched for "SQLite storage space" and this was the second link: https://www.sqlite.org/fileformat2.html All the information you could possibly want there. You cannot exactly work out how much storage space a given data set will use because it depends on how it was created (deletes tend to cause fragmentation for example, which means more space than ...


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It gives an error: ORA-01790: expression must have same datatype as corresponding expression From the documentation for UNION: The corresponding expressions in the select lists of the component queries of a compound query must match in number and must be in the same datatype group (such as numeric or character). Tested at SQLFiddle



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