PostgreSQL DISTINCT Keyword
The Distinct statement is used to select or fetch only the (different) Distinct data from a database table. There are many duplicate values present in the database table, so Distinct is used to list different values.
DISTINCT Syntax :
The syntax of the DISTINCT statement is −
SELECT DISTINCT column1, column2,.....columnN FROM table_name WHERE [condition]
DISTINCT Example :
Consider the STUDENT table is having the following records
ID | NAME | AGE | ADDRESS |
---|---|---|---|
1 | Jugal | 20 | Mysore |
2 | Kartik | 19 | Delhi |
3 | Ashish | 21 | Udaipur |
4 | Prateek | 19 | Jaipur |
5 | Jugal | 20 | Mumbai |
6 | Prateek | 19 | Mumbai |
The following is an example, which would fetch DISTINCT NAME record for a STUDENT.
lfcdb=# SELECT DISTINCT name FROM STUDENT;
All the above statements would create the following records in STUDENT table
NAME | Ashish |
---|
Prateek |
Jugal |
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