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If I have a table such as
1 bob
1 ray
1 bob
1 ray
2 joe
2 joe
And I want to select distinct based on the two columns so that I would get
1 bob
1 ray
2 joe
How can I word my query? Is the only way to concatenate the columns and wrap them around a distinct function operator?
358
To select distinct values in two columns, you can use least() and greatest() function from MySQL.
Answer. Yes, the DISTINCT clause can be applied to any valid SELECT query. It is important to note that DISTINCT will filter out all rows that are not unique in terms of all selected columns.
The DISTINCT clause is used in the SELECT statement to remove duplicate rows from a result set. The DISTINCT clause keeps one row for each group of duplicates. The DISTINCT clause can be applied to one or more columns in the select list of the SELECT statement.
In SQL multiple fields may also be added with DISTINCT clause. DISTINCT will eliminate those rows where all the selected fields are identical.
select distinct id, name from [table]
or
select id, name from [table] group by id, name
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