SQL Notes

Clustered Index: The clustered index is used to reorder the physical order of the table and search based on the key values. Each table can have only one clustered index. The Clustered index is the only index which has been automatically created when the primary key is generated. If moderate data modification needed to be … Read more

Unique Index: For creating a unique index, the user has to check the data in the column because the unique indexes are used when any column of the table has unique values. This indexing does not allow the field to have duplicate values if the column is unique indexed. A unique index can be applied … Read more

There are three types of Indexes in SQL: Unique Index Clustered Index NonClustered Index Bit-Map index Normal index Composite index B-tree index function based index In SQL, there are primarily three types of indexes: Clustered Index: Defines the order in which data is physically stored in a table. The table can have only one clustered … Read more

SQL indexes are the medium of reducing the cost of the query as the high cost of the query will lead to the fall in the performance of the query. An index is used to increase the performance and allow faster retrieval of records from the table. Indexing reduces the number of data pages we … Read more

A view is a virtual table which contains a subset of data within a table. Views are not originally present, and it takes less space to store. A view can have data from one or more tables combined, and it depends on the relationship. Views are used to apply security mechanism in the SQL Server. … Read more