Oracle9i uses indexes to avoid the need for large-table, full-table scans and disk sorts, which are required when the SQL optimizer cannot find an efficient way to service the SQL query.

Analyze database contents using basic, intermediate and advanced SQL statement syntax and usage. Demonstrate capability to query data from multiple tables using SQL JOINS. Create and modify database ...

It handled complex queries having multiple tables, filters, joins, and aggregations better than traditional Text-to-SQL ...

For access modes other than SAS, the individual database management system (DBMS) tables are queried for the Available Tables and Available Columns lists. For DB2, DB2/2, DB2/6000, SYBASE, and ODBC, ...