It fails if any existing row violates the constraint.
It does not validate the existing data in the table.
It enables the constraint to be enforced at the end of each transaction.
It prevents insert, update, and delete operations on the table while the constraint is in the process of beingenabled
第1题:
Which syntax turns an existing constraint on?()
第2题:
Before a Flashback Table operation, you execute the following command: ALTER TABLE employees ENABLE ROW MOVEMENT; Why would you need this to be executed?()
第3题:
What command would you issue to enable automated backups of control files?()
第4题:
You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty.Which statement accomplishes this task?()
第5题:
You work as a database administrator for Supportcenter.cn. You suspect that in one of your applications the customer table is being accessed by some unauthorized users. Which option would you use to monitor the queries being executed on the customer table?()
第6题:
Examine the following statement that is used to modify the constraint on the SALES table: SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE; Which three statements are true regarding the above command()
第7题:
ALTER TABLE table_name ENABLE constraint_name;
ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint _ name;
ALTER TABLE table_name ENABLE CONSTRAINT constraint _ name;
ALTER TABLE table_name TURN ON CONSTRAINT constraint _ name;
第8题:
The constraint remains valid.
The index on the constraint is dropped.
It allows the loading of data into the table using SQL *Loader.
New data conforms to the constraint, but existing data is not checked.
It allows the data manipulation on the table using INSERT/UPDATE/DELETE SQL statements.
第9题:
It fails if any existing row violates the constraint.
It does not validate the existing data in the table.
It enables the constraint to be enforced at the end of each transaction.
It prevents insert, update, and delete operations on the table while the constraint is in the process of being enabled.
第10题:
It succeeds with default settings if the EMPLOYEES table belonging to HR is already defined in the database.
It fails because no SQL *Loader data file location is specified.
It fails if the HR user does not have the CREATE ANY DIRECTORY privilege.
It fails because no SQL *Loader control file location is specified.
第11题:
The constraint remains valid.
The index on the constraint is dropped.
It allows the loading of data into the table using SQL*Loader.
New data conforms to the constraint, but existing data is not checked
It allows the data manipulation on the table using INSERT/UPDATE/DELETE SQL statements.
第12题:
ALTER SESSION ENABLE RESUMABLE_TIMEOUT = 5;
ALTER SYSTEM ENABLE RESUMABLE_TIMEOUT = 5;
ALTER SESSION ENABLE RESUMABLE_TIMEOUT = 300;
ALTER SYSTEM ENABLE RESUMABLE TIMEOUT = 300;
第13题:
A constraint in a table is defined with the INITIALLY IMMEDIATE clause. You executed the ALTER TABLEcommand with the ENABLE VALIDATE option to enable the constraint that was disabled. What are the twoeffects of this command()
第14题:
Which syntax turns an existing constraint on?()
第15题:
Which statement adds a constraint that ensures the CUSTOMER_NAME column of the CUSTOMERS table holds a value?()
第16题:
You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?()
第17题:
You discover an out-of-space condition in the database. You decide to suspend a session for five minutes. You issue the following command to suspend the session: ALTER SESSION ENABLE RESUMABLE; Which command could you issue to enable the resumable space allocation feature at the session level?()
第18题:
Examine the following statement that is used to modify the primary key constraint on the SALES table: SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE; Which three statements aretrue regarding the above command()
第19题:
It fails if any existing row violates the constraint.
It does not validate the existing data in the table.
It enables the constraint to be enforced at the end of each transaction.
It prevents insert, update, and delete operations on the table while the constraint is in the process of beingenabled
第20题:
The PRIMARY KEY is created along with a new index.
The PRIMARY KEY is created and it would use an existing unique index.
The PRIMARY KEY would be created in a disabled state because it is using an existing index.
The statement produces an error because the USING clause is permitted only in the CREATE TABLE command.
第21题:
Use the xml data type to store the message.
Use a user-defined data type to store the message.
Use the nvarchar(max) data type to store the message.
Use a check constraint to validate that the correct tags are used.
Use an XML schema definition (XSD) to validate that the correct tags are used.
Use a foreign key constraint to validate that the correct tags are used.
第22题:
ALTER TABLE table_name ENABLE constraint_name;
ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint_name;
ALTER TABLE table_name ENABLE CONSTRAINT constraint_name;
ALTER TABLE table_name STATUS ENABLE CONSTRAINT constraint_name;
ALTER TABLE table_name TURN ON CONSTRAINT constraint_name;
第23题:
Because row IDs may change during the flashback operation
Because the object number changes after the flashback operation
Because the rows are retrieved from the recycle bin during the flashback operation
Because the table is moved forward and back to a temporary during the flashback opertion
第24题:
alter database controlfile autobackup on
alter system controlfile autobackup on
configure controlfile autobackup on
enable controlfile autobackup