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NEW QUESTION: 1
You want to capture column group usage and gather extended statistics for better cardinality estimates for
the customers table in the SH schema.
Examine the following steps:
1. Issue the SELECTDBMS_STATS. CREATE_EXTENDED_STATS('SH', 'CUSTOMERS')from dual
statement.
2.Execute the dbms_stats.seed_col_usage (null,'SH',500) procedure.
3.Execute the required queries on the customers table.
4.Issue the select dbms_stats.reportwcol_usage('SH', 'customers') from dual statement.
Identify the correct sequence of steps.
A. 4, 1, 3, 2
B. 2, 3, 4, 1
C. 3, 2, 1, 4
D. 3, 2, 4, 1
Answer: B
Explanation:
Explanation/Reference:
Explanation:
Step 1 (2). Seed column usage
Oracle must observe a representative workload, in order to determine the appropriate column groups.
Using the new procedure DBMS_STATS.SEED_COL_USAGE, you tell Oracle how long it should observe
the workload.
Step 2: (3) You don't need to execute all of the queries in your work during this window. You can simply
run explain plan for some of your longer running queries to ensure column group information is recorded
for these queries.
Step 3. (1) Create the column groups
At this point you can get Oracle to automatically create the column groups for each of the tables based on
the usage information captured during the monitoring window. You simply have to call the
DBMS_STATS.CREATE_EXTENDED_STATS function for each table.This function requires just two
arguments, the schema name and the table name. From then on, statistics will be maintained for each
column group whenever statistics are gathered on the table.
Note:
* DBMS_STATS.REPORT_COL_USAGE reports column usage information and records all the SQL
operations the database has processed for a given object.
* The Oracle SQL optimizer has always been ignorant of the implied relationships between data columns
within the same table. While the optimizer has traditionally analyzed the distribution of values within a
column, he does not collect value-based relationships between columns.
* Creating extended statistics
Here are the steps to create extended statistics for related table columns
withdbms_stats.created_extended_stats:
1 - The first step is to create column histograms for the related columns.
2 - Next, we run dbms_stats.create_extended_stats to relate the columns together.
Unlike a traditional procedure that is invoked via an execute ("exec") statement, Oracle extended statistics
are created via a select statement.
NEW QUESTION: 2
Use the following login credentials as needed:
Azure Username: xxxxx
Azure Password: xxxxx
The following information is for technical support purposes only:
Lab Instance: 10543936
You plan to enable Azure Multi-Factor Authentication (MFA).
You need to ensure that [email protected] can manage any databases hosted on an Azure SQL server named SQL10543936 by signing in using his Azure Active Directory (Azure AD) user account.
To complete this task, sign in to the Azure portal.
Answer:
Explanation:
See the explanation below.
Explanation
Provision an Azure Active Directory administrator for your managed instance Each Azure SQL server (which hosts a SQL Database or SQL Data Warehouse) starts with a single server administrator account that is the administrator of the entire Azure SQL server. A second SQL Server administrator must be created, that is an Azure AD account. This principal is created as a contained database user in the master database.
1. In the Azure portal, in the upper-right corner, select your connection to drop down a list of possible Active Directories. Choose the correct Active Directory as the default Azure AD. This step links the subscription-associated Active Directory with Azure SQL server making sure that the same subscription is used for both Azure AD and SQL Server. (The Azure SQL server can be hosting either Azure SQL Database or Azure SQL Data Warehouse.)
2. Search for and select the SQL server SQL10543936
3. In SQL Server page, select Active Directory admin.
4. In the Active Directory admin page, select Set admin.
5. In the Add admin page, search for user [email protected], select it, and then select Select.
(The Active Directory admin page shows all members and groups of your Active Directory. Users or groups that are grayed out cannot be selected because they are not supported as Azure AD administrators.
6. At the top of the Active Directory admin page, select SAVE.
Reference:
https://docs.microsoft.com/en-us/azure/sql-database/sql-database-aad-authentication-configure?
NEW QUESTION: 3
Which two statements are true about firewall filters on an EX Series switch? (Choose two.)
A. A router-based filter applied to an RVI applies to switched packets in the same VLAN.
B. The switch processes each packet through the firewall filters independently of all other packets.
C. Port-based and VLAN-based filters are applied under different family statements in the
CLI.
D. You must explicitly allow traffic in both directions for each connection that you want to permit.
Answer: B,D
NEW QUESTION: 4
Which of the following can be a cloud service owner of a cloud service being offered as an SaaS product? Select the correct answer.
A. All of the above.
B. a cloud consumer organization
C. a cloud consumer also acting as the cloud resource administrator of the SaaS product
D. a cloud provider organization
Answer: A