During the investigation of a SQL Tuning issue, it is often useful for Oracle Support to be able to work directly on a reproduction of the execution plan in a testing environment. To accomplish this, a number of items from the original environment can be collected and uploaded to the Service...
This SQL may need to be investigated in regard what is currently used execution plan, and whether there are any other execution plans for this SQL in the cursor cache or in AWR, and possibly elapsed time of the executions of the SQL using those plans. This could come handy if execution...
An explain planpredictshow Oracle will process your query. An execution plan describes the steps itactually took. Just as in the driving example above, Oracle may use a different route than the one it predicted. AsTom Kyte discusses, there are several reasons this could happen. So to diagnose...
When working with Oracle databases, there are times when you need to optimize and homogenize the database to ensure good performance. This is also known as database tuning. In most cases when tuning a database, you’ll focus on SQL query tuning. In Oracle, SQL query tuning is an importan...
3. Identify Your Execution Plan Determine how your SQL statements are to be executed. Oracle includes the explain plan utility for this purpose. The Oracle explain plan, or any execution plan, allows you to see how a SQL statement will be executed without having to run it. ...
meaning that the query got all of its blocks from the buffer cache without needing to go to the physical disk. The QUERY column shows the number of rows retrieved at that stage. In this case, three rows were retrieved. Because Oracle Database spends some CPU cycles to get a row, the ...
Although some Oracle tools and applications simplify or mask the use of SQL, all database operations are performed using SQL, to take advantage of the security and data integrity features built into Oracle.Overview of SQL Statement Execution
For each of these wins, however, the organization had to work through a scaleup process, bringing together tools and people and making the technical and cultural adjustments required for AI to work in the real world. Below, we’ll look at the many facets of the challenge of scaling up AI...
Step 1: Use the desktop icon to launch Oracle SQL Developer. Step 2: Select the Connections option under View. Step 3: Right-click Connections in the Connections tab and choose New Connection. You’ll see a window asking you to choose a new database connection. Step 4: Fill in the corr...
Check My Oracle Support for recently published bulletins and alerts regarding the upgrade. Upgrade Third-Party Software If necessary, upgrade third-party software that is used by Oracle’s Siebel software. For example, you might have to upgrade the operating system software. Some database upgrades ...