Find practical knowledge without the noise.

Search guides, SQL, error codes, and procedures — or browse by topic below.

388 guides · 8 topics

Advanced SQL

Guides filed under this topic.

Showing 4 technical documents Folder: Advanced SQL
Filtering…
Advanced SQL

Advanced SQL

Advanced SQL ConceptsPIVOT/UNPIVOT for rotating dataMODEL clause for spreadsheet-like computationHierarchical queries us...

Sai Sree Ram Gundepudi Updated Jul 26, 2025 0 views
PIVOT and UNPIVOT

PIVOT and UNPIVOT

PIVOT and UNPIVOT in OraclePIVOTSELECT * FROM ( SELECT department_id, job_id, salary FROM employees ) PIVOT ( SU...

Sai Sree Ram Gundepudi Updated Jul 26, 2025 0 views
MODEL Clause

MODEL Clause

Oracle SQL MODEL ClauseThe MODEL clause lets you perform cell-based calculations using formulas similar to those in Exce...

Sai Sree Ram Gundepudi Updated Jul 26, 2025 0 views
Hierarchical Queries

Hierarchical Queries

Hierarchical QueriesSELECT employee_id, first_name, manager_id, LEVEL FROM employees START WITH manager_id IS NULL CO...

Sai Sree Ram Gundepudi Updated Jul 26, 2025 0 views