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SQLite DISTINCT Keyword

SQLite DISTINCTThe keyword is used in conjunction with the SELECT statement to eliminate all duplicate records and obtain only unique records.

When there are multiple duplicate records in a table, this situation may occur. It is more meaningful to obtain unique records rather than duplicate records when retrieving such records.

Syntax

Here is the basic syntax for using the DISTINCT keyword to eliminate duplicate records.

SELECT DISTINCT column1, column2,.....columnN FROM table_name
WHERE [condition]

Online Example

Consider the COMPANY table with the following records.

ID          NAME        AGE          ADDRESS     SALARY
----------  ----------  ----------  ----------  ----------
1           Paul        32          California  20000.0
2           Allen       25          Texas       15000.0
3           Teddy       23          Norway      20000.0
4           Mark        25          Rich-Mond   65000.0
5           David       27          Texas       85000.0
6           Kim         22          South-Hall  45000.0
7           James       24          Houston     10000.0
8           Paul        24          Houston     20000.0
9           James       44          Norway      5000.0
10          James       45          Texas       5000.0

First, let's take a look at how the following SELECT query returns duplicate salary records.

sqlite> SELECT name FROM COMPANY;

This will produce the following result.

NAME
----------
Paul
Allen
Teddy
Mark
David
Kim
James
Paul
James
James

Now, let'sDISTINCTUse the keyword in the above SELECT query and view the results.

sqlite> SELECT DISTINCT name FROM COMPANY;

This will produce the following result, with no duplicate entries.

NAME
----------
Paul
Allen
Teddy
Mark
David
Kim
James