| Goal | This query identifies complex derived tables (views and materialized views) that perform data integration operations. Specifically, it filters for views whose definition involves joining two or more distinct tables. This distinguishes non-trivial views—which encapsulate relationship logic and data aggregation—from simple projection views that merely mirror a single base table. The result highlights the core reporting and data integration layer of the schema. |
|---|---|
| Notes | In the returned subquery of view/materialized view the query replaces each newline character with the line break (br) tag for the better readability in case the query result is displayed in a web browser. In the result the keyword USING is denoted with bold font. |
| Type | General (Overview of some aspect of the database.) |
| License | MIT (opens in new tab) |
| Data Source | INFORMATION_SCHEMA+system catalog |
| SQL Query |
|
Collections
This query belongs to the following collections:
Find problems by overview
Queries that results point to different aspects of database that might have problems. A human reviewer has to decide based on the results as to whether there are problems or not .
| Name | Description |
|---|---|
| Find problems by overview | Queries that results point to different aspects of database that might have problems. A human reviewer has to decide based on the results as to whether there are problems or not . |
Categories
This query is classified under the following categories:
Derived tables
Queries of this category provide information about the derived tables (views, materialized views), which are used to implement virtual data layer.
Syntactics
Queries of this category provide information about syntactic mistakes.
| Name | Description |
|---|---|
| Derived tables | Queries of this category provide information about the derived tables (views, materialized views), which are used to implement virtual data layer. |
| Syntactics | Queries of this category provide information about syntactic mistakes. |