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What is the use of distinct in SQL?

Contents
  1. What is the use of distinct?
  2. What is distinct and unique in SQL?
  3. What are the advantages in using distinct?
  4. What does distinct function mean?
The SQL SELECT DISTINCT Statement The SELECT DISTINCT statement is used to return only distinct (different) values. Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values.


What is the use of distinct?

The distinct keyword is used in conjunction with select keyword. It is helpful when there is a need of avoiding duplicate values present in any specific columns/table. When we use distinct keyword only the unique values are fetched.

What is distinct and unique in SQL?

The UNIQUE keyword in SQL plays the role of a database constraint; it ensures there are no duplicate values stored in a particular column or a set of columns. On the other hand, the DISTINCT keyword is used in the SELECT statement to fetch distinct rows from a table.

What are the advantages in using distinct?

Distinct decreases the query's performance. Because the normal procedure is sorting the results and then removing rows that are equal to the row immediately before it. DISTINCT compares between all fields of the record. So DISTINCT increases computation .

What does distinct function mean?

adjective. If something is distinct from something else of the same type, it is different or separate from it. [...]

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