[New entry] PostgreSQL Identifiers

content/postgresql/concepts/identifers/identifers.md

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+---
+Title: 'Identifier'
+Description: 'Refers to the name given to database objects such as tables, columns, indexes, etc.'
+Subjects:
+  - 'Data Science'
+  - 'Computer Science'
+Tags:
+  - 'PostgreSQL'
+  - 'Collations'
+CatalogContent:
+  - 'learn-sql'
+  - 'paths/analyze-data-with-sql'
+---
+
+In PostgreSQL, **Identifiers** refer to the names given to database objects such as tables, columns, indexes, views, sequences, and other database components.
+
+## Identifier Types
+
+`Identifier Types` refers to names given to objects in a database like tables, columns, indexes, and other database components. These names help **PostgreSQL** to interact with the database. Different types of identifiers are used:
+
+- **Table Identifiers**: Used to uniquely identify tables in a database.
+- **Column Identifiers**: Specify individual columns within a table.
+- **Index Identifiers**: Represent indexes created for faster query performance.
+- **View Identifiers**: Name views, which are virtual tables based on queries.
+- **Constraint Identifiers**: Refer to rules like primary keys or unique constraints.
+- **Schema Identifiers**: Distinguish schemas that group related database objects.
+- **Sequence Identifiers**: Denote sequences used for auto-incrementing values.
+- **Function Identifiers**: Name functions or stored procedures.
+- **Trigger Identifiers**: Refer to triggers that execute actions automatically.
+- **Role Identifiers**: Specify roles for managing user permissions.
+- **Foreign Key Identifiers**: Represent foreign key constraints linking tables.
+- **Aggregate Type Identifiers**: Identify aggregate data types for grouped queries.
+- **Tablespace Identifiers**: Name tablespaces where database objects are stored.