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# Database
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This schema defines the Database entity. A database also referred to as Database Catalog is a collection of tables.
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2021-10-19 17:03:52 +05:30
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**$id: [https://open-metadata.org/schema/entity/data/database.json](https://open-metadata.org/schema/entity/data/database.json)**
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Type: `object`
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## Properties
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- **id**
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- Unique identifier that identifies this database instance.
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- $ref: [../../type/basic.json#/definitions/uuid](../types/basic.md#uuid)
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- **name** `required`
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- Name that identifies the database.
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- $ref: [#/definitions/databaseName](#databasename)
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- **fullyQualifiedName**
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- Name that uniquely identifies a database in the format 'ServiceName.DatabaseName'.
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- Type: `string`
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- **displayName**
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- Display Name that identifies this database.
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- Type: `string`
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- **description**
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- Description of the database instance.
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- Type: `string`
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- **version**
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- Metadata version of the entity.
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- $ref: [../../type/basic.json#/definitions/entityVersion](../types/basic.md#entityversion)
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- **updatedAt**
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- Last update time corresponding to the new version of the entity.
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- $ref: [../../type/basic.json#/definitions/dateTime](../types/basic.md#datetime)
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- **updatedBy**
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- User who made the update.
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- Type: `string`
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- **href**
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- Link to the resource corresponding to this entity.
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- $ref: [../../type/basic.json#/definitions/href](../types/basic.md#href)
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- **owner**
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- Owner of this database.
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- $ref: [../../type/entityReference.json](../types/entityreference.md)
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- **service** `required`
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- Link to the database cluster/service where this database is hosted in.
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- $ref: [../../type/entityReference.json](../types/entityreference.md)
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- **usageSummary**
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- Latest usage information for this database.
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- $ref: [../../type/usageDetails.json](../types/usagedetails.md)
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- **tables**
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- References to tables in the database.
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- $ref: [../../type/entityReference.json#/definitions/entityReferenceList](../types/entityreference.md#entityreferencelist)
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## Type definitions in this schema
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### databaseName
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- Name that identifies the database.
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- Type: `string`
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- The value must match this pattern: `^[^.]*$`
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- Length: between 1 and 64
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2021-08-26 13:33:44 +05:30
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2021-10-19 17:03:52 +05:30
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_This document was updated on: Monday, October 18, 2021_
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