What is the functionality of SQL COUNT?
It returns the no of record of table
It returns the no of record of database
It returns the no of record of row
It returns the no of record of column
Correct Answer :
A. It returns the no of record of table
SQL COUNT returns the no of record of table.
Related Questions
Which statement is used to select the database in SQL?
SELECT
USE
ALTER
CREATE
In the case of the ____ Independence Rule, It shouldn't make a difference what the user sees (application) if the logical structure changes.
Physical Data
Logical Data
Integrity
Distribution
Which function is used to extract substrings from the column of the table
ROUND()
MID()
FORMAT()
NOW()
What does BOOL mean in MySQL Numeric Data Types?
A Boolean value is specified by this variable. When a value is nonzero, it is considered false, and zero is considered true.
A Boolean value is specified by this variable. When a value is nonzero, it is considered true, and zero is considered false.
A Boolean value is specified by this variable. When a value is nonzero, it is considered true, and zero is also considered true.
A Boolean value is specified by this variable. When a value is nonzero, it is considered false, and zero is also considered false.
Which of the following is/are TRUE about DDL command?
Our data is stored in a table that is described by the schema, thus DDL commands deal with the schema.
With the DDL commands, any structural changes can be made to the table, including creation, deletion, and alteration.
Both A. and B.
None of the above
Which of the following constraints are TRUE to be put in Password system?
One uppercase character must be included in the password.
An eight-character minimum password is required.
At least one symbol must appear in the password.
All of the above
Name of the data type categories are,
String Data types
Numeric Data types
Date and time Data types
All of the above
Which of the following statement is TRUE?
Web API is the part of HTML5
Web API is not the part of HTML5
Web API is the part of HTML
Web API is the part of XHTML
SQL has the advantage of?
SQL require a lot of programming.
SQL provides High-Speed Query Processing.
SQL follows the standard languages of ANSI and ISO.
SQL is easily portable.
What will be the output of the below SQL statement?
2021-10-06 00:00:00.000
2021-10-06
2021 OCT 06
06-10-2021
SQL BETWEEN is a ______ operator.
Relational
Logical
Arithmetic
Assignment
GROUP BY clause is placed before which clause in SQL?
HAVING
WHERE
ORDER BY
FROM
Which syntax is correct for RENAME DATABASE in MySQL?
RENAME old_database_name TO new_database_name;
RENAME DATABASE old_database_name TO new_database_name;
ALTER old_database_name MODIFY NAME = new_database_name;
ALTER DATABASE old_database_name MODIFY NAME = new_database_name;
By constraining a SQL statement, we limit the ____ according to certain conditions or restrictions.
Row
Column
Table
Database
Which of the following is NOT the SQL Arithmetic Operator?
Addition
Subtraction
Unary
Modulus
What is the difference between VARCHAR and VARCHAR2?
VARCHAR can store upto 4000 bytes and VARCHAR2 can store upto 8000 bytes.
VARCHAR can store upto 2000 bytes and VARCHAR2 can store upto 4000 bytes.
Both VARCHAR and VARCHAR2 are similar but use of VARCHAR2 is mostly recommended.
There is no similarity between VARCHAR and VARCHAR2.
____ value is returned by the SQL Aggregate functions?
Single
Twice
NULL
Infinite
Which of the following is TRUE about The Foundation Rule in the 12 Codd's Rules?
Relational databases are required.
Databases contain a wide variety of information, and each row and column of each table must hold this information.
The primary key value, table name, and column name are characteristics that allow us to access the precise data (atomic value) logically from a relational database.
Null values are treated in database records according to this rule.
The SQL Modulus Operator returns the,
Quotient
Percentage
Sum
Reminder
When an expression includes ___ SQL operator(s), the sequence in which they are evaluated is known as the SQL operator's precedence.
0
1
Multiple
NULL
What does task list consist of in SQL Script?
Import
Show Quotas
Manage Results
All of the above
All other columns other than the column which is termed as Primary Key, are known as
Unique Keys
Alternate Keys
Composite Keys
None of the above
What does the COMMIT Statement do?
The data specified in this table or view is reported in this SQL statement.
Changes made in the SQL database transaction are permanently saved using this SQL statement.
Specify the columns of the table in this SQL statement to return distinct values.
By running this SQL statement, the transaction will be undone and the operations not yet saved to the SQL database will be undone.
What does the TRUNCATE TABLE Statement do?
In the database management system, this SQL statement deletes the existing database, together with all the database tables and views.
In this SQL statement, the data or records are inserted into an existing database table. One query statement can insert multiple records simultaneously using this statement.
By executing this SQL statement, all records in the SQL database will be deleted.
The data specified in this table or view is reported in this SQL statement.
ORDER BY clause comes ____ the EXCEPT clause in SQL statement?
Before
After
Flexible to before or after
None of the above
Which of the following is among the 12 Codd's Rules?
View Updating Rule
Relational Level Operation Rule
Distribution Independence Rule
None of the above
SQL contains which component in its process?
Optimization Engines
SQL Query Engines
Query Dispatchers
All of the above
Types of SQL Commands are
DDL
DML
DCL
All of the above
What is meant by 'SQL is an interactive language'?
Learning and understanding SQL is easy
It can also be used for communicating with the database.
In a few seconds, complex queries can also be answered using this language.
All of the above
A SELECT statement is intersected to use it as a join, but it only returns the records that are ________ between both statements.
Distinct
Common
Shared
Both B and C