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Download MySQL 8.0 Database Developer Exam Dumps
NEW QUESTION 31
Examine these commands which execute successfully:
mYsql> CREATE TABLE income (acct_num INT, amount DECIMAL(10,2));
mysql> CREATE TRIGGER subtotal BEFORE INSERT ON income
FOR EACH ROW SET @subtotal = subtotal + NEW.amount;
Which is true for the income table?
- A. Execution of an insert statement causes the trigger to activate.
- B. The trigger activates after any row has been inserted into the table.
- C. The trigger body set causes trigger activation.
- D. The trigger activates after any row in the table has been updated.
Answer: A
NEW QUESTION 32
Which change will prevent negative ages to be inserted into the people table?
- A. ALTER TABLE people ADD COLUMN valid_age=ABS(check_age) GENERATED ALWAYS;
- B. ALTER TABLE people ADD CONSTRAINT check_age CHECK (ABS(age)>=0);
- C. DELIMITER //
CREATE TRIGGER age check AFTER INSERT ON people FOR EACH ROW IF NEW. age < 0 THEN SET NEW.age =0; END IF;// DELIMITER; - D. DELIMITER //
CREATE TRIGGER agecheck BEFORE INSERT ON people FOR EACH ROW IF NEW. age < 0 THEN SET NEW.age =0; END IF;// DELIMITER ;
Answer: B
NEW QUESTION 33
Examine these commands which execute successfully in the sequence shown in Sessions S1 and S2:
Now, examine this statement that execute successfully in s1:
S1> SELECT * FROM emp;
Which is true about the result of the select statement?
- A. The inserted row is not returned because the isolation level is READ COMMITTED in S2.
- B. The inserted row is not returned because the transaction still active in s2.
- C. The inserted row is returned because the isolation level is RPEATABLE READ in S1.
- D. The inserted row is returned because the transaction is auto committed in S2.
Answer: D
NEW QUESTION 34
Examine the output:
Which explain command will obtain the output?
- A. EXPLAIN ANALYZE
- B. EXPLAIN PARTITIONS
- C. EXPLAIN FORMAT=TREE
- D. EXPLAIN PORMAT=JSON
- E. EXPLAIN PORMAT^TRADITIONAL
Answer: B
NEW QUESTION 35
Examine this statement and output:
What causes the error?
- A. The database server is running in read-only mode.
- B. The database server process does not have sufficient privilege.
- C. The database user does not have sufficient privilege.
- D. The database client process does not have sufficient privilege.
- E. The set local_infile option has not been enabled.
- F. The engine is disabled.
Answer: B
NEW QUESTION 36
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