MCQ IN COMPUTER SCIENCE & ENGINEERING

COMPUTER SCIENCE AND ENGINEERING

SQL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the below Query can be used to set the new Auto-increment value to 500 in our table.
A
Update DataFlair AutoIncrement = 500;
B
ALTER TABLE DataFlair AUTO ____ INCREMENT = 500 ;
C
ALTER DataFlair TABLE Auto ____ Increment = 500;
D
ALTER DataFlair Increment ____ value = 500;
Explanation: 

Detailed explanation-1: -The MS SQL Server uses the IDENTITY keyword to perform an auto-increment feature. In the example above, the starting value for IDENTITY is 1, and it will increment by 1 for each new record. Tip: To specify that the “Personid” column should start at value 10 and increment by 5, change it to IDENTITY(10, 5) .

Detailed explanation-2: -In MySQL, auto increment counter starts from 0 by default, but if you want the auto increment to start from another number, use the below syntax. ALTER TABLE yourTable auto increment=yourIntegerNumber; To understand the above syntax, let us first create a table.

Detailed explanation-3: -You can also make an auto increment in SQL to start from another value with the following syntax: ALTER TABLE table name AUTO INCREMENT = start value; In the syntax above: start value: It is the value from where you want to begin the numbering.

Detailed explanation-4: -ALTER TABLE Inventory MODIFY COLUMN item number INT AUTO INCREMENT=50; After running this code, future item IDs will start at an item number of 50 and increment by 1. To change the starting increment value and increment in SQL Server, set your non-default values during table creation.

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