What is the meaning of Null Values in Systematic Treatment of Null Values in the 12 Codd's Rules?
No value in cell
Inappropriate Information
Unknown data
All of the above
Correct Answer :
D. All of the above
Null Values in Systematic Treatment of Null Values in the 12 Codd's Rules has different meanings such as no value in the cell, missing the data, inappropriate information, the primary key should not be null and unknown data.
Related Questions
In the script field, script is found by entering the
Script Name
Script Number
Script ID
Script Symbol
Which of the following is SQL Server Numeric Data Type?
image
nchar
money
cursor
Which statement is TRUE about the GROUP BY Clause?
In order to retrieve rows, GROUP BY Clause is used.
In order to group the rows that share the same property, GROUP BY Clause is used.
In order to select the defined groups, GROUP BY Clause is used.
In order to return the rows, GROUP BY Clause is used.
In order to sort the records according to the columns, which clause is used?
HAVING
GROUP BY
ORDER BY
None of the above
Commands that come under TCL is/are -
COMMIT
ROLLBACK
SAVEPOINT
All of the above
What is TRUE about SQL EXCEPT clause?
The result is purged of duplicates
Duplicate records are not removed
Only one column can be compared by a clause
None of the above
For one table, there can be ____unique key constraint(s).
1
NULL
Many
None of the above
Which of the following statement is TRUE about SQL Injection?
SQL Injection is an Object Penetration Technique
SQL Injection is a Function Penetration Technique
SQL Injection is a Code Penetration Technique
SQL Injection is a Database Penetration Technique
Commands that comes under DDL is/are
CREATE
DROP
TRUNCATE
All of the above
When two or more columns are combined to be used to uniquely identify each row in the table, it is known as -
Primary Key
Unique Key
Composite Key
Foreign Key
What does task list consist of in SQL Script?
Import
Show Quotas
Manage Results
All of the above
By constraining a SQL statement, we limit the ____ according to certain conditions or restrictions.
Row
Column
Table
Database
It is possible to retrieve time in a more readable format, using which function?
TIME
TIME_FORM
TIME_FORMAT
TIME & DATE
To get the table's previous permanent status, use the ____ command.
Commit
Transaction
Rollback
None of the above
SQL BETWEEN is a ______ operator.
Relational
Logical
Arithmetic
Assignment
Which of the following clause is optional in SQL SELECT Statement?
SELECT
FROM
HAVING
None of the above
Using the ___ statement, a database can be renamed.
SQL CREATE DATABASE
SQL RENAME DATABASE
SQL DROP DATABASE
SQL SELECT DATABASE
Which of the following is SQL Server Date and Time Data Type?
timestamp
sql_variant
real
text
When SELECT statements used to create Views contain ____ clauses, the views cannot be updated.
JOIN
HAVING
GROUP BY
All of the above
Select the correct order of precedence among the following?
OR > NOT > + > **
NOT > OR > ** > +
** > + > OR > NOT
** > + > NOT > OR
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.
Name of the control in SQL Script
Script
Owner
Opinion
All of the above
Select the statement which is TRUE?
In a table, there could be any number of rows and any number of columns.
In a table, there could be any number of rows and specified number of columns.
In a table, there could be any number of columns and specified number of rows.
In a table, there could be specified number of rows and specified number of columns.
Comments whose starting and ending lines are different are known as
Inline Comments
Multi-line Comments
Single Line Comments
Varied line Comments
SQL Operator can be,
Unary
Binary
Both A and B
None of the above
What does the UPDATE Statement do?
By deleting the stored data, this SQL statement deletes the database.
A new table in SQL is created using this SQL statement.
The stored data in the SQL database is changed or modified by this SQL statement.
Columns in the SQL database can be created, deleted, or modified with this SQL statement.
Local Temp Variable is used with which sign?
?
@
#
&
What is the full form of GUID?
Guided Unique Identifier
Guided Unique Interpreter
Globally Unique Identifier
Globally Unique Interpreter
Which of the following is supported in Comprehensive Data SubLanguage Rule in the 12 Codd's Rules?
Data Definition
View Definition
Data Manipulation
All of the above
What does the following statement do?
Finds any values that start with a and ends with o
Finds any values whose first character is a and third character is o
Both A. and B.
None of the above