Answers for "select unique column in sql"

SQL
5

MySQL DISTINCT

When querying data from a table, you may get duplicate rows. In order to remove these duplicate rows, you use the DISTINCT clause in the SELECT statement.

Here is the syntax of the DISTINCT clause:

SELECT DISTINCT
    select_list
FROM
    table_name;
Posted by: Guest on October-19-2020
0

how to make a column unique in SQL

ALTER TABLE Persons
ADD CONSTRAINT UC_Person UNIQUE (ID,LastName);
Posted by: Guest on November-06-2021

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