Unique Index. UNIQUE INDEX is used to enforce the uniqueness of values in single or multiple columns. We can create more than one unique index in a single table. For creating a unique index, the user ...

Contribute to zeynep-png/SQL_DISTINCT_COUNT development by creating an account on GitHub. ... The objective here is to determine how many distinct replacement cost values exist in the film table. This ...

To count distinct values in Excel, you need to add the unique values with the first of the duplicate value. Although it sounds complicated, you will see that there are a few simple formulas to apply ...

Calculating the number of distinct values (i.e., NDV) in a column of a big table is costly yet fundamental to a variety of database applications such as data compression and profiling. To reduce the ...

The primary key column is often set to auto-increment when constructing a SQL Server database. To achieve this, the IDENTITY property is enabled on the primary key column. The starting value and ...