1Z1-921 무료 덤프문제 온라인 액세스

Which three options are valid reasons for using a primary key in a table?

• A.preventing duplicate keys
• B.exporting data faster with mysqldump
• C.maintaining a history of row insertions or updates
• D.increasing performance when using select statements
• E.to make it easier to change the PRIMARY KEY value
• F.automatic storage of data in a sorted order

How does MySQL HeatWave improve query performance?
Response:

• A.By replicating data across multiple servers.
• B.By caching the entire database in memory.
• C.By offloading analytics queries to an in-memory, highly parallel processing engine.
• D.By automatically creating indexes on frequently used columns.

Which three prerequisites are needed for creating an Oracle Linux VM instance in the Oracle Cloud Infrastructure?

• A.Custom Image
• B.bare metal Oracle Linux shape
• C.existing VCN
• D.ssh key pair
• E.subnet configured on a Virtual Cloud Network (VCN)
• F.Object Storage

You have a backup image file that is backed up using MySQL Enterprise Backup with the -compress option:
/home/mysq1/backup/full/mybackup/myimage. Img

You are required to perform a database restore to a new machine to provision the database. Which command can provision the new database in the datadir as /home/mysql/data/MEB?

• A.
• B.
• C.
• D.
• E.

Which statement adds a column with the largest integer data type?

• A.ALTER TABLE SCIENTIFIC ADD scientific_value DECIMAL(15,10);
• B.ALTER TABLE SCIENTIFIC ADD scientific_value BIGINT;
• C.ALTER TABLE SCIENTIFIC ADD scientific_value DECIMAL(10,10);
• D.ALTER TABLE SCIENTIFIC ADD scientific_value INTEGER;