LEARN BITMAP INDEXES

#bitmapindexes #databseindexes #bitmaps #systemdesign #learnsystemdesign #indexing In this video learn how bitmaps can be used to create database indexing.Bitmap Indexing is a special type of database indexing that uses bitmaps. This technique is used for huge databases, when column is of low cardinality and these columns are most frequently used in the query. Need of Bitmap Indexing – The need of Bitmap Indexing will be clear through the below given example : For example, Let us say that a company holds an employee table with entries like EmpNo, EmpName, Job, New_Emp and salary.

Bitmap Indexing is a special type of database indexing that uses bitmaps. This technique is used for huge databases, when column is of low cardinality and these columns are most frequently used in the query.

Need of Bitmap Indexing – The need of Bitmap Indexing will be clear through the below given example : For example, Let us say that a company holds an employee table with entries like EmpNo, EmpName, Job, New_Emp and salary. Let us assume that the employees are hired once in the year, therefore the table will be updated very less and will remain static most of the time. But the columns will be frequently used in queries to retrieve data like : No. of female employees in the company etc. In this case we need a file organization method which should be fast enough to give quick results. But any of the traditional file organization method is not that fast, therefore we switch to a better method of storing and retrieving data known as Bitmap Indexing.

bitmap indexes machine-learning

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