Remove duplicates in mysql query

1. How to SELECT without duplicates in MySQL?
2. How do I get no duplicates in SQL query?
3. Can SQL query automatically eliminates duplicates?
4. How to SELECT only unique values in MySQL?
5. How to remove all duplicate rows in MySQL?
6. How to filter duplicates in MySQL?
7. How do I avoid duplicates in SELECT query?
8. Can SQL query automatically eliminate duplicates?

How to SELECT without duplicates in MySQL?

When querying data from a table, you may get duplicate rows. To remove these duplicate rows, you use the DISTINCT clause in the SELECT statement. In this syntax, you specify one or more columns that you want to select distinct values after the SELECT DISTINCT keywords.

How do I get no duplicates in SQL query?

If you want the query to return only unique rows, use the keyword DISTINCT after SELECT . DISTINCT can be used to fetch unique rows from one or more columns.

Can SQL query automatically eliminates duplicates?

Explanation: An SQL does not remove duplicates like relational algebra projection, we have to remove it using distinct. An SQL will work slowly but surely if there are no indexes.

How to SELECT only unique values in MySQL?

You can select unique value with the help of DISTINCT keyword.

How to remove all duplicate rows in MySQL?

MySQL provides you with the DELETE JOIN statement that allows you to remove duplicate rows quickly. This query references the contacts table twice, therefore, it uses the table alias t1 and t2. The query returns an empty set, which means that the duplicate rows have been deleted.

How to filter duplicates in MySQL?

mysql> SELECT DISTINCT last_name, first_name -> FROM person_tbl -> ORDER BY last_name; An alternative to the DISTINCT command is to add a GROUP BY clause that names the columns you are selecting. This has the effect of removing duplicates and selecting only the unique combinations of values in the specified columns.

How do I avoid duplicates in SELECT query?

If you want the query to return only unique rows, use the keyword DISTINCT after SELECT . DISTINCT can be used to fetch unique rows from one or more columns. You need to list the columns after the DISTINCT keyword.

Can SQL query automatically eliminate duplicates?

Explanation: An SQL does not remove duplicates like relational algebra projection, we have to remove it using distinct.