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# SQL Domains
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# Domains
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A SQL domain (also called usage domain or domain) is a dictionary object that belongs to a schema and encapsulates a set of optional properties and constraints for common values. After you define a SQL domain, you can define table columns to be associated with that domain, thereby explicitly applying the domain's optional properties and constraints to those columns. SQL domains are used to provide additional information to a stored column (JSON or relational), and therefore, used to define and validate data.
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A domain (also Data Use Case Domain) is a dictionary object that belongs to a schema and encapsulates a set of optional properties and constraints for common values. After you define a domain, you can define table columns to be associated with that domain, thereby explicitly applying the domain's optional properties and constraints to those columns. SQL domains are used to provide additional information to a stored column (JSON or relational), and therefore, used to define and validate data.
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Oracle's SQL domain implementation provides a wider range of functions than the one specified in the SQL standard (see Part 2 Foundation (SQL Foundation)).
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Oracle's domain implementation provides a wider range of functions than the one specified in the SQL standard (see Part 2 Foundation (SQL Foundation)).
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Reviewed: 27.03.2024
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Reviewed: 30.10.2024
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# When to use this asset?
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To learn about the SQL Domains features.
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To learn about the Oracle's domain features.
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# How to use this asset?
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Run the scripts in your preferred SQL environment or IDE.
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Run the scripts in folder files in your preferred SQL environment or IDE.
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# Useful Links
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## Documentation
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- [SQL Language Reference 23c](https://docs.oracle.com/en/database/oracle/oracle-database/23/sqlrf/create-domain.html#GUID-17D3A9C6-D993-4E94-BF6B-CACA56581F41)
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- [SQL Language Reference Release 23](https://docs.oracle.com/en/database/oracle/oracle-database/23/sqlrf/create-domain.html#GUID-17D3A9C6-D993-4E94-BF6B-CACA56581F41)
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- [Database Development Guide](https://docs.oracle.com/en/database/oracle/oracle-database/23/adfns/registering-application-data-usage-database.html#GUID-6F630041-B7AE-4183-9F97-E54682CA6319)
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# Team Publications
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- [Less coding using new SQL Domains in 23c](https://blogs.oracle.com/coretec/post/less-coding-with-sql-domains-in-23c)
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- [Oracle Database 23c Free Developer Release - 10 features you should know](https://blogs.oracle.com/coretec/post/oracle-database-23c-free-developer-sql)
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## Blogs
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- [Less coding using Domains](https://blogs.oracle.com/coretec/post/less-coding-with-sql-domains-in-23c)
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- [Oracle Database 23 Free Developer Release - 10 features you should know](https://blogs.oracle.com/coretec/post/oracle-database-23c-free-developer-sql)
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## Videos
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- [Oracle Database 23ai Playlist](https://www.youtube.com/playlist?list=PLHA__TOeNI7MNBND0JWQUqTYOQ1up-VHX)
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- [Data Use Case Domains](https://youtu.be/DVGNzwLnkpA?si=8zuLO8g3i8F_Le3d)
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# License
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