18 lines
444 B
Markdown
18 lines
444 B
Markdown
---
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categories:
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- Databases
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- Programming_Languages
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tags: [SQL]
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---
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# SQL: ALTER
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We use the `ALTER` query to add, remove and otherwise change the structural properties of a table.
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## Add an additional field to existing table
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This adds a `price` field to the `sales` table. The `price` field accepts data of the type `real` . `real` is a slightly less precise (less memory) version of float
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```sql
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ALTER TABLE sales ADD price real;
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```
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