I require selecting 10 records at a time and at the same time I also require to know the total count of records.
How would you do this?

You can use SQL_CALC_FOUND_ROWS in SELECT statement and execute FOUND_ROWS().
Sample query:

SELECT SQL_CALC_FOUND_ROWS * FROM Test LIMIT 10;
SELECT FOUND_ROWS();

The First statement will return your 10 records and second statement will return total count of records.
The FOUND_ROWS() function will not internally use COUNT so it performs better.

Find all database starting with ‘db’.

SHOW DATABASES LIKE 'db%';

How to concatenate this two string?

String 1: ‘My name is Anvesh.’

String 2: ‘I am Database Administrator.’

SELECT CONCAT('My name is Anvesh.',' I am Database Administrator.');

How to get a portion of a string by specifying position?

SELECT SUBSTR('I am Anvesh Patel',6,6);

How to select month from given date?

SELECT MONTH(NOW()); 
SELECT MONTHNAME(NOW());

How to format date in MM-DD-YY format?

SELECT DATE_FORMAT(NOW(),'%m-%d-%y');

How to format date in week – day – month – year format?

SELECT DATE_FORMAT(NOW(),'%W %D %M %Y');

How to copy the only table structure and create a new table?

CREATE TABLE Test2 AS SELECT *FROM Test WHERE 1=2;

How to make copies of the table with data and structure?

CREATE TABLE Test2 AS SELECT *FROM Test;

What are the result of below queries?

SELECT NULL + 8 FROM DUAL;

Result : NULL

SELECT NULL OR TRUE FROM DUAL;

Result : 1

SELECT NULL AND TRUE FROM DUAL;

Result : NULL

How to convert numeric values to strings?

SELECT CAST(88.808 AS CHAR) FROM DUAL;

How to convert string values to Date format?

SELECT STR_TO_DATE('08-Aug-2015 8:08:08', '%d-%b-%Y') FROM DUAL;

How to add new column to an existing table?

ALTER TABLE test ADD COLUMN RecordDateTime DATETIME;

How to drop column from an existing table?

ALTER TABLE test DROP COLUMN RecordDateTime;

How to rename a column in an existing table?

ALTER TABLE Test CHANGE COLUMN OldColumnName NewColumnName INTEGER;

How to rename existing Table?

ALTER TABLE Test rename to Test2;

How to drop index of a table?

DROP INDEX idx_tbl_test_rno ON test;

Check running all MySQL Server Processes.

mysqladmin -u root -p processlist

Command to shutdown MySQL.

mysqladmin -u root -p shutdown

Check MySQL current version.

mysqladmin -u root -p version

Check MySQL is running or not.

mysqladmin -u root -p ping

How to list all databases from the MySQL Server?

Show databases;

How to switch or use to a database?

Use MyDatabase;

How to list all tables from the MySQL Server?

Show tables;

How to see a description or definition of the Table?

describe tablename;

How to find top N records for each group?
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