ClickHouse/docs/en/system_tables/system.one.rst
2017-04-27 23:16:22 +03:00

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system.one
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This table contains a single row with a single 'dummy' UInt8 column containing the value 0.
This table is used if a SELECT query doesn't specify the FROM clause.
This is similar to the DUAL table found in other DBMSs.