December 2018
Beginner to intermediate
496 pages
10h 44m
English
Content preview from Tableau 10 Complete Reference
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When to use an extract
You should consider various factors when determining whether or not to use an extract. In some cases, you won't have an option (for example, OLAP requires a live connection and some cloud-based data sources require an extract). In other cases, you'll want to evaluate your options.
In general, use an extract when:
- You need a better performance than you can get with the live connection.
- You need the data to be portable.
- You are using legacy (JET driver) connections to Excel, Access, or text files and you need to use functions, such as COUNTD (count distinct), that are not supported by the JET driver but are supported when the data is extracted.
- You want to share a packaged workbook. This is especially true if you want ...
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