August 2012 - Technology with Vivek Johari

Boyce – Codd Normal Form (BCNF)

August 19, 2012January 28, 2019 vivekjohari8 Comments

Boyce – Codd Normal Form (BCNF) :- A normal form is said to be a Boyce – Codd Normal Form if it is in 3NF and there is not a possibility of a key attribute is determined by a Non Key attribute. For example , suppose there are 5 columns says A,B,C,D,E and combination of the columns A and […]

Isolation levels in SQL Server

August 19, 2012February 1, 2019 vivekjohari33 Comments

Isolation levels :- Isolation level is required to isolate a resource and protect it from other transactions. This is achieved with the help of locks but what locks are needed and how they can be established is decided on the isolation level set on the database level. If low level of Isolation is set, it […]