2022-08-05 20:00:04 +01:00
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---
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tags:
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- Programming_Languages
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- Databases
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- sql
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---
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2022-08-06 09:00:04 +01:00
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# SQL: The UPDATE query
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2022-08-05 20:00:04 +01:00
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With UPDATE we modify existing records.
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## Schematic syntax
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````sql
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UPDATE [table_name]
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SET [field]
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WHERE [conditional expression/filter]
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````
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## Real example
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````sql
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UPDATE manufacturer
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SET url = '<http://www.hp.co.uk>'
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WHERE manufacturer_id = 4; --typically this will be the primary key as you are updating and existing record and need to identify it uniquely
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````
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## Multiple fields
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````sql
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UPDATE manufacturer
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SET url = '<http://www.apple.co.uk>',
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year_founded = 1977
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WHERE manufacturer_id = 2;
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````
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