Home >> MySql >> What is key in MySql

What is key in MySql

If no. of rows / tuples are very large then accessing any row will be very time consuming. so, in order to make searching yfaster key concept is introduced.

It is defined as an attribute or single attribute or group of attribute which is used to uniquely identify each and every row / tuple uniquely.

Post Your Comment

Next Questions
What is super key
What is candidate key
What is primary key
What is unique key
What is foreign key
What is join
What is cross join
What is natural join
What is outer join
What is self join
What is aggregate function
COUNT(*) aggregate function
AVG() aggregate function
MIN() aggregate function
MAX() aggregate function
SUM() aggregate function
STDED() aggregate function
CONCAT() function
GROUP_CONCAT() function
CONCAT_WS() function
CHECKSUM_AGG() aggregate function
ABS(n) aggregate function
POWER(m,n) aggregate function
ROUND() aggregate function
SQRT() aggregate function

Copyright ©2022 coderraj.com. All Rights Reserved.