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https://github.com/lancedb/lancedb.git
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Jack Ye
52684d50b9
OSS docs now own the full usage content for features that only run against an Enterprise deployment, since the client interface itself lives here; Enterprise docs keep only the parts specific to its own behavior. Sophon's overlay for these five pages is dropped since the OSS versions are now the complete reference. SQL Reference is restructured to match an object-type SQL manual (DDL by object, then DML, then DQL, then Expressions) instead of the old flat, loosely-ordered page list, absorbing the SQL client-connection guide and FTS-via-SQL examples into it.
34 lines
1.1 KiB
Plaintext
34 lines
1.1 KiB
Plaintext
---
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title: "Update"
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sidebarTitle: "Update"
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description: "UPDATE ... SET ... WHERE — and why it does not recompute derived columns."
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icon: pen
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keywords: ["update", "sql"]
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---
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<Badge color="red">Enterprise</Badge> [SQL runs on a deployment.](/sql)
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```sql
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UPDATE documents SET title = upper(title) WHERE category = 'film'
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```
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Assignments take any expression the [dialect](/sql/functions) supports,
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including references to other columns of the same row. Without a `WHERE`
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clause every row is updated.
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<Warning>
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An update does not recompute [computed columns](/feature-engineering/add-computed-column)
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that derive from the column you changed. A filled value keeps what it was
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computed from -- see [Guarantees](/basics/guarantees#jobs).
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</Warning>
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Commits a new table version, so [versioning](/management/table#versioning) and
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the [write guarantees](/basics/guarantees#writes) apply -- including that the
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version advances even when the statement affects zero rows.
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## What to read next {#next}
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<Card title="Update" icon="pen" href="/ingestion/update">
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The SDK equivalent.
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</Card>
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