SQL – Unique Indexes Table of content SQL Unique Indexes The SQL Unique Index ensures that no two rows in the indexed columns of a table have the same values (no duplicate values allowed). A unique index can be created on one or more columns of a table using the CREATE UNIQUE INDEX statement in […]

SQL – Clustered Index Table of content An index in a database is a data structure that helps to improve the speed of retrieving specific data from tables and views. Data in a table is stored in the form of an unordered data structure called a “Heap”, where rows are placed without any specific order. […]

SQL – Show Indexes Table of content The SQL Show Index Statement The SHOW INDEX is the basic SQL statement to retrieve the information about the indexes that have been defined on a table. However, the SHOW INDEX statement only works on MySQL RDBMS and is not a valid statement in the SQL Server. To […]