Answers for "how to set unique column in mysql"

SQL
1

mysql query unique column

SELECT DISTINCT(column_name) FROM your_table_name;

#You can select distinct values for one or more columns. The column names has to be separated with comma.
SELECT DISTINCT column_name_1, column_name_2 FROM your_table_name;
Posted by: Guest on May-03-2021
1

mysql alter table set column unique

ALTER TABLE contacts
ADD CONSTRAINT contacts_unique UNIQUE (reference_number);
Posted by: Guest on June-17-2020

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