Which of the following is the feature(s) of SQL Auto Increment?
In some cases you may not have any unique identifying characteristics in data; therefore, it makes sense to create a Primary Key.
Explicitly initializing and modifying the auto-increment value is possible at any time.
Record identifiers can easily be created that are unique to each record.
All of the above
Correct Answer :
D. All of the above
Features of SQL Auto Increment are:
a) In some cases you may not have any unique identifying characteristics in data; therefore, it makes sense to create a Primary Key.
b) Explicitly initializing and modifying the auto-increment value is possible at any time.
c) Record identifiers can easily be created that are unique to each record.
d) Automatic incrementing allows flexibility in handling gaps between records.
e) Syntax-speaking, auto-increment queries in SQL are straightforward.
Related Questions
In case of ____Rule, 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.
Systematic Treatment of Null Values
Guaranteed Access
View Updating
Physical Data Independence
NULL means
ZERO
-1
1
Empty
To add a Primary Key constraint after table is created, which clause is used?
UPDATE
ADD
ALTER
JOIN
Name of the operators in SET Operators is
UNION
INTERSECT
MINUS
All of the above
What is the difference between nvarchar and ntext?
nvarchar is fixed and ntext is variable.
nvarchar is variable and ntext is fixed.
nvarchar can be of the maximum size upto 4000 characters and ntext can be of the maximum size upto 2GB of the text data.
nvarchar can be of the maximum size upto 4000 characters and ntext can be of the maximum size upto 1GB of the text data.
What is the clause to delete all rows from the table?
SQL DELETE ALL ROWS Table_Name;
SQL DELETE ROWS Table_Name;
DELETE FROM ALL ROWS Table_Name;
DELETE FROM Table_Name;
Following the completion of a transaction, it must be executed to save all the operations performed in the transaction. Here we are talking about which command?
REVOKE
COMMIT
ROLLBACK
SAVE
____ integrity is achieved by using a foreign key.
Referential Integrity
Domain Integrity
User-defined Integrity
Entity Integrity
Name of the control in SQL Script
Script
Owner
Opinion
All of the above
Full form of TCL is -
Transaction Common Language
Transaction Commit Language
Transaction Concatenate Language
Transaction Control Language
Which of the following statement is TRUE about Primary Key?
Table integrity is not enforced by the primary key.
The data in a primary key is always multiple.
900 bytes is the maximum length of a primary key.
Null values are allowed in primary keys.
What does the DELETE Statement do?
A new table in SQL is created using this SQL statement.
By deleting the stored data, this SQL statement deletes the database.
Columns in the SQL database can be created, deleted, or modified with this SQL statement.
By executing this SQL statement, you remove the table and all the information that it contains, including the structure, views, permissions, and triggers.
The numerical values of two ___ of the ___ table can be easily subtracted using SQL Subtraction Operator.
Rows, same
Columns, same
Rows, different
Columns, different
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
Using a WHERE clause in a SQL query is used to specify SQL reserved words and characters, known as ____?
Operators
Data Types
Numbers
Syntax
The Web SQL API is supported by
Opera
Google Chrome
Android Browsers
All of the above
Select the correct syntax of SELECT TOP clause?
SELECT TOP name
SELECT TOP column
SELECT TOP FROM
SELECT TOP Number
What is TRUE about the Active/Dynamic Online Catalog based on the relational model in the 12 Codd's Rules?
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.
Database dictionaries represent the complete logic of all descriptive data, which must be stored online.
None of the above
SQL EXCEPT returns the record from -
First SELECT Query
Second SELECT Query
Third SELECT Query
None of the above
Which of the following keyword is used to delete the Join?
DELETE
ON
WHERE
All of the above
Determine the correct SQL command?
CREATE
UPDATE
DELETE
All of the above
When the table is dropped:
Table structure is dropped
Integrity constraints are dropped
Relationship is dropped
All of the above
Whenever a sub query appears in SQL, it is enclosed within ____ and placed to the ____ of the SQL operators.
Brackets, Left
Brackets, Right
Parenthesis, Left
Parenthesis, Right
In order to remove an index, we need to use which command?
REMOVE
DELETE
DROP
DEL
A database does not need to be created in ____. A direct table creation option is provided in ____.
MySQL
Oracle
Both A and B
None of the above
In LIKE clause, to represent a single character, _____ is used.
-
_
!
&
Which statement is true about the No-SQL?
No-SQL follows ACID Model.
No-SQL does require object-relational mapping.
Dynamic schemas for unstructured data are used in No-SQL databases.
No-SQL databases are not preferable for storage of hierarchal data.
To connect strings, which function is used
CONNECT
ADD
COMBINE
CONCAT
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.
What is the default length of any data type in the CAST function?
10
20
30
40