Database - Sql Test

Test Instructions :

1. The Test is 1hr duration.
2. The Test Paper consists of 30 questions. The maximum marks are 30.
3. All the questions are multiple choice question type with three options for each question.
4. Out of the three options given for each question, only one option is the correct answer.
5. Each question is allotted 1 mark for each correct response.
6. 0.25 will be deducted for incorrect response of each question.
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Given an employees table as follows:   emp_id emp_name 1 Brush 2 Jerrin  what value will be return by below query ? Select count(*) from employees  

  

  

  

  

USE keyword is used to select a ___________

  

  

  

  

With SQL, how can you insert "Olsen" as the "LastName" in the "Persons" table?

  

  

  

In a LIKE clause, you can ask for any 6 letter value by writing?

  

  

  

  

In a SELECT with a GROUP BY clause, a WHERE clause, and a HAVING clause, the WHERE conditions are applied before the HAVING conditions.

  

  

  

  

What kind of replication is supported by the MySQL server?

  

  

  

  

Which of these field types would be best to hold a film title?

  

  

  

  

With SQL, how do you select all the records from a table named "Persons" where the value of the column "FirstName" starts with an "a"?

  

  

  

  

  

How many distinct, different values can you hold in an enum field?

  

  

  

  

mysql_pconnect() is used to make a persistent connection to the database which means a SQL link that do not close when the execution of your script ends.

  

  

What does the DESC keyword do in the following query? SELECT * FROM MY_TABLE WHERE ID > 0 ORDER BY ID, NAME DESC

  

  

  

  

  

What MySQL property is used to create a surrogate key in MySQL?

  

  

  

  

What is Row?

  

  

  

  

MySQL runs on which operating systems?

  

  

  

  

Which SQL keyword is used to sort the result-set?

  

  

  

  

Can I define multiple unique constraints on a table?

  

  

Which command is used for taking “server side help” in Mysql command line tool

  

  

  

  

Which of the following is not a valid aggregate function?

  

  

  

  

Which of the following ways below are the correct way to get the current date?

  

  

  

  

The main MySQL program that does all the data handling is called?

  

  

  

  

A view is nothing but a ________ table or a stored query

  

  

  

  

You are required to buy a license for MySQL if

  

  

  

  

  

Which of the following file extension is a valid MyISAM file extension?

  

  

  

  

In a LIKE clause, you can could ask for any value ending in "qpt" by writing

  

  

  

  

If you want to undo a GRANT, you should use

  

  

  

  

  

If you're writing a client using the C language API, your source code should include the following line at the top:

  

  

  

  

Which of the following is not a character manipulation function?

  

  

  

  

MySQL Access security is controlled through?

  

  

  

  

Can joins be nested?

  

  

Which of the following is used to delete an entire MYSQL database?

  

  

  

  

Which of the following is NOT available in MySQL?

  

  

  

  

Which statement is used to access an existing Database?

  

  

  

  

Which of these is not a valid name for a column

  

  

  

  

Which one will delete the table data as well as table structure?

  

  

MySql | Which of the following is available in MySQL:

  

  

  

  

  

With SQL, how can you return the number of records in the "Persons" table?

  

  

  

  

What is DML?

  

  

  

  

Which of the following is not a MySQL Operator?

  

  

  

  

Where is metadata stored in MySQL?

  

  

  

  

What is the command for counting all the rows in a table in MySQL?

  

  

  

  

What MySQL property is used to create a surrogate key in MySQL?

  

  

  

  

How do I find out all databases starting with ‘test to which I have access to?

  

  

  

  

What does SQL stand for?

  

  

  

  

With SQL, how can you delete the records where the "FirstName" is "Peter" in the Persons Table?

  

  

  

Which of these field types would be best to hold a .jpg image?

  

  

  

  

How much character are allowed to create database name?

  

  

  

  

Which of the following is not an SQL aggregate function?

  

  

  

  

  

Which of the following DBMSs do not have a native PHP extension?

  

  

  

  

  

Which SQL statement is used to insert a new data in a database?

  

  

  

  

Which of these commands will delete a table called XXX if you have appropriate authority:

  

  

  

  

An outer join requires each record in the two joined tables to have a matching record.

  

  

  

  

How can you change "Hansen" into "Nilsen" in the "LastName" column in the Persons table?

  

  

  

  

Sometimes the expression "select count(*)" will return fewer rows than the expression "select count(value)".

  

  

With SQL, how can you insert a new record into the "Persons" table?

  

  

  

Primary Key does allow the Null Values. where as in Unique key doesn't accept the Null values.

  

  

What is Column?

  

  

  

  

Which of the following commands should be used to create a database named “student”?

  

  

  

  

Which is the default order of sort in ORDER BY clause?

  

  

With SQL, how do you select a column named "FirstName" from a table named "Persons"?

  

  

  

Which of the following is not an SQL aggregate function?

  

  

  

  

  

What's the difference between the DESCRIBE and SHOW FIELDS FROM commands?

  

  

  

What is a candidate key?

  

  

  

  

On executing DELETE command, if you get an error "foreign key constraint" what does it imply?

  

  

  

  

MySQL comes with as standard with client libraries for:

  

  

  

  

Transactions are used to treat sets of SQL statements atomically.

  

  

Which SQL statement is used to extract data from a database?

  

  

  

  

  

Which function used to get the current time in mysql?

  

  

  

A table may be joined to itself.

  

  

  

Which SQL statement is used to update data in a database?

  

  

  

  

When do we use a HAVING clause?

  

  

  

  

Which command is used for showing current date and time in Mysql command line tool?

  

  

  

  

What is an open source DBMS product that runs on UNIX, Linux and Windows

  

  

  

  

How can we get the number of records or rows in a table?

  

  

  

  

Which of the following is NOT supported by MySQL

  

  

  

  

With SQL, how do you select all the columns from a table named "Persons"?

  

  

  

  

What is DDL?

  

  

  

  

Can DISTINCT command be used for more than one column?

  

  

What is Table?

  

  

  

  

To use MySQL on your computer, you'll need?

  

  

  

  

Enum values are stored according to their index numbers

  

  

How many TRIGGERS are allowed in MySql table?

  

  

  

  

Internally information is held in tables. Which of these is NOT a valid format:

  

  

  

  

  

What is DCL?

  

  

  

  

To remove duplicate rows from the result set of a SELECT use the following keyword:

  

  

  

  

Which of the following is the correct SQL statement to use to remove rows from a table?

  

  

  

  

MySQL supports the complete SQL99 standard

  

  

If an ENUM column is declared NOT NULL, its default value is the first element of the list of allowed values.

  

  

  

  

A NULL value is treated as a blank or 0.

  

  

  

Can I call a trigger directly called from an application?

  

  

How to view all Triggers in MySQL?

  

  

  

  

Which SQL statement is used to delete data from a database?

  

  

  

  

One of the early proponents of relational database who laid down many of the principles we use to this day was:

  

  

  

  

  

The program called mysql is

  

  

  

  

  

Which SQL statement is used to return only different values?

  

  

  

  

The “Mysql command line tool” format the results in which of the following format:

  

  

  

  

The result of a SELECT statement can contain duplicate rows.

  

  

  

BLOB data type can have default column value.

  

  

How is structure of a table got in MySQL?

  

  

  

  

A SELECT command without a WHERE clause returns?

  

  

  

  

Which of these is a valid call to a function (watch the spaces carefully!)

  

  

  

  

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