Question:What is query caching? 

Query caching, available with the version 4.0.1 release, greatly improves the performace of selection queries by storing query results in memory and retrieving those results directly, rather than repeatedly querying the database for the same result set.

Question:Name all storage engines that are available in MySQL. 

1. MyISAM
2. IBMDB2I
3. InnoDB
4. MEMORY
5. MERGE
6. FEDERATED
7. ARCHIVE
8. CSV
9. EXAMPLE
10. BLACKHOLE

Question:Briefly describe the following Engines:
a. MyISAM
b. InnoDB
c. MEMORY  

MyISAM:
1. MyISAM become MYSQL's default storage engine as of version 3.23. 
2. MyISAM tables are operating system independent.
3. Capable of sorting more data, but at a cost of less storage space than counterpart.
4. Three MyISAM formats: static, dynamic, and compress are available.

InnoDB
1. Robust transactional storage engine
2. Working with large data stores.
3. It has been available to MySQL users since version 3.23 and effective solution for transactional applications

MEMORY:
1. To attain the fastest response time possible, the logical storage media is system memory.
2. Sorting table data in memory does indeed offer impressive performance.
3. If the mysqld daemon crashes, all MEMORY data will be lost.

Question:Classify the MySQL datatypes. 

MySQL broken down datatypes in three broad categories: a) Date and time b) Numeric data types c) String data types

a) Data types in Date and time  category:
1. DATE
2. DATETIME
3. TIME
4. TIMESTAMP
5. YEAR

b) Data types in Numeric  category:
1. BOOL, BOOLEAN
2. BIGINT
3. INT
4. MEDIUMINT
5. SMALLINT
6. TINYINT
7. DECIMAL
8. DOUBLE
9. FLOAT ([M,D])
10. FLOAT (precision)

c) Data types in String category:
1. CHAR
2. VARCHAR
3. LONGBLOB
4. LONGTEXT
5. MEDIUMBLOB
6. MEDIUMTEXT
7. BLOB
8. TEXT
9.TINYBLOB
10. TINYTEXT
11. ENUM
12. SET

Question:Name all the MySQL data type attributes. 

MySQL supported data type attributes are:
1. AUTO_INCREMENT
2. BINARY
3. DEFAULT
4. INDEX
5. NATIONAL
6. NOT NULL
7. NULL
8. PRIMARY KEY
9. UNIQUE
10. ZEROFILL

Question:Write the examples for the following mysql commands on the table.

a) SHOW
b) CREATE
c) INSERT
d) UPDATE
e) SELECT
f) ALTER
g) DESC
h) DESCRIBE
i) DROP
j) DELETE 

a) example:
 mysql> show tables;

b) example:
mysql>create table book(
    id int(10) not null auto_increment primary key,
    title varchar(50) not null,
    author varchar(50)
);

c) example:
mysql>insert into book(title,author)values('MySQL','Mikel Jone');

d) example:
mysql>update book set title='Advanced MySQL' where id=1;

e) example:
mysql>select id, title, author from book;

f) example:
mysql>alter table book add column isbn varchar(20);

g) example:
mysql>desc book;

h) example:
mysql>describe book

i) example:
mysql>drop table book;

j) example:
mysql>delete from book where id=3;

Question:What is transaction? 

A transaction is an ordered group of database operations that are treated as a single unit. Successful transaction will be committed and unsuccessful transaction will be rolled back.

Question:What is cursor? Why is it used? 

Iterating through a result set.  Known as a cursor, it allows us to retrieve each row in the set separately and perform multiple operations on that row without warring about affecting other rows in the set.

Question:What is the difference between primary key and unique? 

The PRIMARY KEY attribute is used to guarantee uniqueness for a given row. No values residing in a column designated as a primary key are repeatable or nullable within that column whereas a column assigned the UNIQUE attribute will ensure that all values possess distinct values, excenpt that NULL values are repeatable.

Question:What are the advantages of stored routine? 

Stored routines have a number of advantages, which are:
1. Consistency
2. Performance
3. Security
4. Architecture