What is the SQL profile in Oracle?

What is the SQL profile in Oracle?

A SQL profile is a set of auxiliary information specific to a SQL statement. Conceptually, a SQL profile is to a SQL statement what statistics are to a table or index. This information can improve optimizer cardinality and selectivity estimates, which in turn leads the optimizer to select better plans.

Where can I find SQL profile in Oracle?

Oracle SQL profile

1. Run SQL tuning advisor. Run the following SQL tuning advisor code for sql_id, 6dkrnbx1zdwy38 :
2. Accept the sql_profile. Run the following code to accept the sql_profile:
3. Check the name of the sql_profile. Use the following query to check the sql_profile name:
4. Disable the sql_profile.
5. Drop the sql_profile.

How do I create a SQL profile?

Using Database Mail Configuration Wizard On the Manage Profiles and Accounts page, select Create a new profile option, and click Next. On the New Profile page, specify the Profile name, Description and add accounts to be included in the profile, and click Next.

What is SQL profile and baseline in Oracle?

When used together with its regular inputs, a SQL profile helps the optimizer minimize mistakes and thus more likely to select the best plan. A SQL plan baseline for a SQL statement consists of a set of accepted plans. When the statement is parsed, the optimizer will only select the best plan from among this set.

What is SQL profiling?

Microsoft SQL Server Profiler is a graphical user interface to SQL Trace for monitoring an instance of the Database Engine or Analysis Services. You can capture and save data about each event to a file or table to analyze later.

How do I find my SQL profile?

Manage SQL Profile in Oracle Database

1. Check the SQL Profile in the Database. COLUMN category FORMAT a10. COLUMN sql_text FORMAT a20.
2. Check the SQL Profile internal hint information. SELECT. a.name.
3. Create the SQL Profiles. Two ways:
4. Disable the SQL Profiles. BEGIN.

How do I find my SQL profile name?

To check SQL Agent, right-click then properties, choose the Alert System tab. The profile being used will be listed on there.

What is Oracle default profile?

A default profile can be created – a default already exists within Oracle named DEFAULT – it is applied to any user not assigned another profile. Assigning a new profile to a user account supersedes any earlier profile. Profiles cannot be assigned to roles or other profiles.

What is the difference between SQL profile and SPM baseline?

Difference Between SQL Profiles and SQL Baselines SQL profiles only helps the optimizer to choose the better plan providing some additional stats and information but it does not force the optimizer for any specific plan . Where as the SQL baselines constrain the optimizer to choose from the accepted set of plans.

How SQL profile is implemented in Oracle?

How to Create Custom SQL Profile

1. Step 1: Review the mail.html.
2. Step 2: Run COE_XFR_SQL_PROFILE.
3. Step 3: Create Custome SQL Profile.
4. Step 4: Verif is it using SQL_PROFILE.
5. Step 5: Flushing a Single SQL Statement from Library Cache (Only if required)

How do I profile a SQL query?

Profiling SQL Queries

1. On the Start page, click Query Profiler. A new SQL document window opens.
2. In the text editor, type the following script: SELECT * FROM AdventureWorks2012. Person. Person WHERE FirstName = ‘Robin’
3. Click Execute. The Plan Diagram window opens.

What is a SQL profile in Oracle Enterprise Manager?

If a statement has multiple plans in a SQL plan baseline, then a SQL profile is useful because it enables the optimizer to choose the lowest-cost plan in the baseline. Oracle Enterprise Manager Cloud Control (Cloud Control) usually handles SQL profiles as part of automatic SQL tuning.

How are SQL profiles used by the database?

The use of SQL profiles by the database is transparent to the user. A SQL profile is a collection of auxiliary statistics on a query, including all tables and columns referenced in the query. The profile is stored in the data dictionary. The optimizer uses this information during optimization to determine the most optimal plan.

Can the optimizer create a new plan for a SQL profile?

If either the optimizer environment or SQL profile changes, then the optimizer can create a new plan. As tables grow, or as indexes are created or dropped, the plan for a SQL profile can change. The profile continues to be relevant even if the data distribution or access path of the corresponding statement changes.

How does the SQL profile store the number of rows?

For example, if a SQL profile exists for SELECT * FROM t WHERE x=5 AND y=10, then the profile stores the actual number of rows returned. When choosing plans, the optimizer has the following sources of information: