Is secondary index worthy? What is secondary indexing? It is a technique to make search faster in a database management system. Also, it is a two-index technique used to reduce the mapping size of the primary index. In other words, it is another index in the table that can be used to make queries with …
Why Isolation Level Required? Isolation is one of the ACID principles. Our objective here is not to make this article too lengthy, so we are proceeding with some important pointers. Please have a glance at them for quick revision: During the execution of concurrent transactions on the database system, isolation means each transaction completes its …
Why ‘nolock’ is used to read data in SQL? NoLock is a mechanism that helps you to read uncommitted data. It is the same as the read uncommitted isolation level. By keeping it short let’s move to when it is used. It is used when you do not care whether you receive accurate data or not. …
Primary Index! Something not to forget Primary Key Indexing in a database management system is the concept to make searching fasters. This is the biggest challenge which is to search a record from millions of records in the lowest time complexity. Before discussing the primary index. Let’s see what is sparse and dense index is. …
