The SELECT DISTINCT statement would let you get only unique information from a field that consists lots of duplicate data. In other words, a field that contains lots of repeated values, to ignore those repeated values the SELECT DISTINCT statement is used.
It won’t allow the column’s data to repeat more than a single time and it gives filtered information with optimization as it doesn’t fetch entire duplicate information (take less memory).
Syntax:
SELECT DISTINCT feild1,feild2,.. FROM Table_name;
For Example:
Suppose you have a table namely as user_details:
and if you want to fetch only non repeated value of gender field, the command would be:
SELECT DISTINCT gender FROM user_details;
Output:
