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Update from.md

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Denny Crane 2023-02-23 21:21:36 -04:00 committed by GitHub
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docs/en/sql-reference/statements/select/from.md
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@ -36,6 +36,8 @@ Queries that use `FINAL` are executed slightly slower than similar queries that
**In most cases, avoid using `FINAL`.** The common approach is to use different queries that assume the background processes of the `MergeTree` engine have’t happened yet and deal with it by applying aggregation (for example, to discard duplicates).
`FINAL` be applied automatically using [FINAL](../../operations/settings/settings.md) setting to all tables in a query using a session or a user profile.
## Implementation Details
If the `FROM` clause is omitted, data will be read from the `system.one` table.