Online Access Free Oracle.1z0-909.v2023-03-13.q22 Practice Test (Page 5)

1Z0-909 Exam Question 16

Which change will prevent negative ages to be inserted into the people table?

A.DELIMITER //
CREATE TRIGGER age check AFTER INSERT ON people FOR EACH ROW IF NEW. age < 0 THEN SET NEW.age =0; END IF;// DELIMITER;

B.DELIMITER //
CREATE TRIGGER agecheck BEFORE INSERT ON people FOR EACH ROW IF NEW. age < 0 THEN SET NEW.age =0; END IF;// DELIMITER ;

C.ALTER TABLE people ADD CONSTRAINT check_age CHECK (ABS(age)>=0);

D.ALTER TABLE people ADD COLUMN valid_age=ABS(check_age) GENERATED ALWAYS;

1Z0-909 Exam Question 17

The employee table includes these columns:
e_id INT, e_name VARCHAR (45), dept_id INT salart INT
You must create a stored function, getMaxSalary(), which returns the maximum salary paid for a given department id.
Which statement will create the function?

1Z0-909 Exam Question 18

Examine the content of the employee table:

Now examine this PHP script:

Finally examine this desired output:

A.$options = [PDO:: ATTR_DEFAUXT_FETCH__MODE => PDO: : PDO: :FETCH_OBJ] ;

B.$options = [PDO:: ATTR__DEFAULT_FETCH MODE => PDO: :FETCH_CLASS] ;

C.$options = [PDO:: ATTR_DEFAULT_FETCH__MODE => PDO: : FETCH_ASSOC] ;

D.$options = [PDO:: ATTR_DEFAOLT_FETCH__MODE => PDO : : FETCH_BOTH] ;

1Z0-909 Exam Question 19

Examine this statement which has executed successfully:

A.No index will improve statement performance.

B.Execution performance can be improved by using like instead of RLIKE.

C.The statement takes advantage of index description_idx.

D.Execution performance can be improved by, using a composite index with column description as the leftmost prefix column description.

E.Execution performance can be improved by adding an index on column description.

1Z0-909 Exam Question 20

You must enforce data integrity for data Inserted in a JSON column.
Which statement successfully creates a constraint in a 3SON column?

A.CREATE TABLE fshop (product JSON CHECK (JSON_VALID(product) ) ) ;

B.CREATE TABLE fshop ( product JSON, f INT' GENERATED ALWAYS AS (product->"S - id") ) ;

C.CREATE TABLE fshop (id INT NOT NULL AUTOINCREMENT, product JSON, PRIMARY KEY (id)) ENGINE=InnoDB;

D.CREATE TABLE fshop (id INT NOT NULL AUTO_ INCREMENT, product JSON, CHECK (id>0) ) ENGXNE=InnoDB;

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