ClickHouse/docs/en/dicts/index.rst
2017-04-27 23:16:22 +03:00

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Dictionaries
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A dictionary is a mapping (key -> attributes) that can be used in a query as functions. You can think of this as a more convenient and efficient type of JOIN with dimension tables.
There are built-in (internal) and add-on (external) dictionaries.
.. toctree::
:glob:
*