[Free] 2018(Jan) EnsurePass Testking Oracle 1z0-882 Dumps with VCE and PDF 11-20

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Oracle Certified Professional, MySQL 5.6 Developer

Question No: 11

Assume your connection uses SQL mode ANSI_QUOTES. Which two statements cause a syntax error?

  1. CREATE TABLE FRIENDS (NAME CHAR (10))

  2. CREATE TABLE BINARY (PRIMARY SMALLINT)

  3. CREATE TABLE ‘TABLE’ (COLUMN’ INTEGER)

  4. CREATE TABLE “CONDITION” (“DESCRIBE” TEXT)

  5. CREATE TABLE INTERVAL (ELAPSED_TIME TIME)

Answer: B,E

Question No: 12

You wish to create a trigger on the ‘city’ table that will check the value of the ‘District’ field before any INSERT. The trigger needs to change it to” Unknown” for an empty string or NULL.

CREATE TRIGGER City_bi BEFORE INSERT ON CITY FOR EACH ROW

BEGIN

IF OLD. District IS NULL OR OLD.District= . . THEN

SET NEW.District=’Unknown’; END IF :

END;

Does the CREATE TRIGGER statement accomplish this goal?

  1. Yes; the trigger works correctly.

  2. No; FOR EACH ROW is invalid syntax.

  3. No; the syntax should be CREATE TRIGGER city-bi ON city BEFORE INSERT….

  4. No; the OLD keyword cannot be used in an INSERT trigger.

Answer: D

Question No: 13

You are connected to a MySQL server and using a prepared statement. You accidentally exit your session.

What will happen if you log back in to use your prepared statement?

  1. The statement exists, but will need to be deallocated and re-created.

  2. The statement exists, but the user variables need to be redefined.

  3. The statement can be used, if the MySQL server hasn’t been restarted.

  4. The statement no longer exists.

Answer: D

Reference: http://dev.mysql.com/doc/refman/5.0/en/sql-syntax-prepared-statements.html

Question No: 14

Inspect the CREATE TABLE below:

Mysqlgt; CREATE TABLE foo (a INT, PRIMARY KEY (a)) ENGINE =InnoDB;

Query Ok, 0 rows affected, 2 warnings (0.11 sec) Mysqlgt; SHOW WARNINGS;

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Which two is true connecting the meaning of the warnings?

  1. The InnoDB storage engine was disabled during server startup.

  2. Global variable skip _innodb was set to ON after the server had started.

  3. The default storage engine MYISAM was used for the table created.

  4. MYSQL server was not started with the option default -storage -engine=InnoDB

  5. Needed to specify TYPE = InnoDB instead of ENGINE=InnoDB

Answer: D,E

Question No: 15

A complex query consists of eight populated tables that are all connected via INNER JOIN operands as shown:

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You modify the query and replace the SELECT operand with SELECT STRAIGHT JOIN. What is the effect of adding STRAIGHT JOINs to the query?

  1. The optimizer processes only the JOINs in the sequence listed in the query.

  2. The optimizer will only JOIN the tables by using their PRIMARY KEYS or UNIQUE constraints.

  3. The optimizer will only JOIN the tables in sequence from smallest to largest.

  4. The optimizer ignores all terms in the WHERE clause until all JOINs have been completed.

Answer: A

Question No: 16

Assume that the current database has a table with the following structure (the values for the Field column have been removed for the purpose of this question)

Mysql gt; DEBS count trylanguage;

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How can you select only the first two columns?

  1. SELECT 1, 2 FROM Countrylanguage;

  2. SELECT * FROM Counytrylanguage LIMIT 1, 2,

  3. SELECT *{1,2} FROM Countrylanguage;

  4. SELECT * (1), *[2] FROM Counyrylanguage;

  5. It is not possible without using the column names or without using any other tables or queries.

Answer: E

Question No: 17

These there tables represent a many -to-many relationship in asocial networking database:

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This query draft is constructed to report for the past 30 days: Which change will correct this query?

  1. Option A

  2. Option B

  3. Option C

  4. Option D

Answer: B

Question No: 18

What is true about the contents of the INFORMATION_SCHEMATA table?

  1. It contains information about the table structure for all databases.

  2. It contains information about all the tables, triggers, and views for all databases.

  3. It contains information such as name, character set, and collation for all the databases on the server.

  4. It contains information including tables, trigger, stored routines, and views for all databases

Answer: C

Reference: http://www.mssqltips.com/sqlservertutorial/196/informationschematables/ (overview)

Question No: 19

Which two queries return a value of NULL?

  1. SELECT NULL =NULL

  2. SELECT NULL is NULL

  3. SELECT NULL lt;= gt; NULL

  4. SELECT 1 gt; NULL

  5. SELECT COUNT (NULL);

Answer: A,D

Question No: 20

Inspect the query:

Mysqlgt; SELECT count (emp_no) FROM titles WHERE title = ‘senior staff’;

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How can this query be optimized?

  1. The query need an index on the emp-no column.

  2. The query cannot be optimized as an index is already used.

  3. The query needs an index that includes the title column.

  4. The query cannot be optimized as count () must read all rows.

Answer: B

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