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  

  

  

  

  

Mysql command line tool is used to show “how many rows are returned and how long SQL command took to execute”

  

  

  

  

Which of the following can add a row to a table?

  

  

  

  

What is Row?

  

  

  

  

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

  

  

  

  

  

Use the .............. to delete the data inside the table, and not the table itself?

  

  

  

  

Can joins be nested?

  

  

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

  

  

  

  

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

  

  

MySQL Access security is controlled through?

  

  

  

  

SQL is not case sensitive. SELECT is the same as select.

  

  

What will happen at the end of the following sequence of SQL commands? BEGIN TRANSACTION DELETE FROM MYTABLE WHERE ID=1 DELETE FROM OTHERTABLE ROLLBACK TRANSACTION

  

  

  

  

  

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

  

  

  

  

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

  

  

  

  

What is Table?

  

  

  

  

Which of the following is not a MySQL Operator?

  

  

  

  

The ............. statement is used to delete a table.

  

  

  

  

With SQL, how do you select all the records from a table named "Persons" where the "FirstName" is "Aru" and the "LastName" is "Sum"?

  

  

  

  

Which of the following is not an SQL aggregate function?

  

  

  

  

  

Where is metadata stored in MySQL?

  

  

  

  

MySql | Which of the following is available in MySQL:

  

  

  

  

  

With SQL, how can you return all the records from a table named "Persons" sorted descending by "FirstName"?

  

  

  

  

What does SQL stand for?

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

  

A user with RELOAD priveliges can

  

  

  

  

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

  

  

  

  

The "father" of MySQL is

  

  

  

  

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

  

  

  

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

  

  

  

When do we use a HAVING clause?

  

  

  

  

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

  

  

  

  

  

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

  

  

  

  

What is DCL?

  

  

  

  

How is structure of a table got in MySQL?

  

  

  

  

The program called mysql is

  

  

  

  

  

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

  

  

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"?

  

  

  

  

  

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

  

  

  

  

How many TRIGGERS are allowed in MySql table?

  

  

  

  

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

  

  

  

  

BLOB data type can have default column value.

  

  

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

  

  

  

  

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

  

  

  

  

Which of the following is not a character manipulation function?

  

  

  

  

What is DDL?

  

  

  

  

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

  

  

  

  

  

How much storage space does DATETIME require?

  

  

  

  

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

  

  

  

  

A SELECT command without a WHERE clause returns?

  

  

  

  

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

  

  

  

  

The USE command?

  

  

  

  

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

  

  

  

  

Which of the following is NOT available in MySQL?

  

  

  

  

USE keyword is used to select a ___________

  

  

  

  

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

  

  

  

  

You are required to buy a license for MySQL if

  

  

  

  

  

Which of the following is not an SQL aggregate function?

  

  

  

  

  

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

  

  

  

  

  

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

  

  

  

  

A NULL value is treated as a blank or 0.

  

  

  

MySQL is

  

  

  

  

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

  

  

  

  

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

  

  

Can I define multiple unique constraints on a table?

  

  

How to view all Triggers in MySQL?

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Which statement is used to access an existing Database?

  

  

  

  

Can I call a trigger directly called from an application?

  

  

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

  

  

  

Which of these is not a valid name for a column

  

  

  

  

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

  

  

  

  

What is DML?

  

  

  

  

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

  

  

  

  

MySQL supports the complete SQL99 standard

  

  

With SQL, how do you select all the records from a table named "Persons" where the "LastName" is alphabetically between (and including) "Hansen" and "Pettersen"?

  

  

  

If you want to undo a GRANT, you should use

  

  

  

  

  

What type of lock will deny users any access to a table?

  

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

What is a candidate key?

  

  

  

  

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

  

  

  

  

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

  

  

  

  

What kind of replication is supported by the MySQL server?

  

  

  

  

What is Column?

  

  

  

  

User() fucntion returns the current users user name and ___________

  

  

  

  

Can DISTINCT command be used for more than one column?

  

  

Transactions are used to treat sets of SQL statements atomically.

  

  

Commands passed to the MySQL daemon are written in.

  

  

  

  

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

  

  

  

  

What SQL clause is used to restrict the rows returned by a query?

  

  

  

  

The “Mysql command line tool” formats are bounded by

  

  

  

  

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

  

  

  

Which authentications are required for login into Mysql command line tool?

  

  

  

  

MySQL runs on which operating systems?

  

  

  

  

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