hi, l'm using oracle 9i and trying to use FIRST_ROWS hint, l run SQL statement as below and it didn't work as expected, it returned all rows on that table.anyone know where did i missed ? any help would be appriciate.
Some examples of TopN queries (note the difference between using ROWNUM and analytical functions in how they handle ties - salaries of SCOTT and FORD), as well as a more efficient way to query RowsBetweenXandY
Why doesn't the Oracle optimizer use my index?
Querying too much data
Most Oracle developers know that an index is useful when you can use it to restrict your result set to a small number of the total rows in a table.
So, the obvious side…
How to Create User-Defined Aggregates in Oracle
Before we begin creating these things, what are user-defined aggregates? They are a feature introduced in Oracle 9i that allows a developer to create his or her own functions like "SUM", "AVG", and…
This video shows, step by step, how to configure Oracle Heterogeneous Services via the Generic Gateway Agent in order to make a connection from an Oracle session and access a remote SQL Server database table.