View
File extension:
*.view
Overview:
The *.view files in the codbex platform are used to define and manage database views. Views are virtual tables that represent the result of a stored query.
Here's an explanation of the example PERSONS_VIEW.view
file and its properties:
{
"name": "PERSONS_VIEW",
"type": "VIEW",
"query": "SELECT * FROM PERSONS",
"dependencies": [
"table:/my-project/tables/PERSONS.table:PERSONS"
]
}
Properties:
name
(String): Specifies the name of the view. In this example, it is namedPERSONS_VIEW
.type
(String): Indicates the type of the artifact, and for views, it is set toVIEW
.query
(String): Contains the SQL query that defines the view. In this example, it isSELECT * FROM PERSONS
, which retrieves all columns from thePERSONS
table.dependencies
(Array of Strings): Lists the dependencies of the view. Each dependency is specified in the formatartifactType:artifactLocation:artifactName
. In this example, the view depends on the "PERSONS" table.
Example Usage:
The example PERSONS_VIEW.view
file defines a view named PERSONS_VIEW
that represents the result of the SQL query SELECT * FROM PERSONS
. It depends on the PERSONS
table.
Getting Started:
Create a View File:
Create a new *.view
file or modify an existing one based on your specific view requirements.
Define Query:
Specify the SQL query within the query property to define the content of the view.
Set Dependencies:
Specify any tables or artifacts on which the view depends within the dependencies array. This ensures that the necessary data is available for the view.
Use the View:
Once defined, the view can be used in queries and applications as if it were a table, providing a virtual representation of the underlying data.
Best Practices:
Clear Naming Conventions:
Follow clear and consistent naming conventions for views to ensure easy identification and reference.
Optimize Query:
Optimize the SQL query within the query property to retrieve only the necessary columns and rows for efficient performance.
Conclusion:
The *.view
files in the platform provide a convenient way to define virtual tables based on SQL queries. Views can be used to simplify complex queries, encapsulate logic, and provide a structured way to access and present data.