How do I select distinct for only one column?

How do I select distinct for only one column?

Adding the DISTINCT keyword to a SELECT query causes it to return only unique values for the specified column list so that duplicate rows are removed from the result set. Since DISTINCT operates on all of the fields in SELECT’s column list, it can’t be applied to an individual field that are part of a larger group.

How do I select a distinct column in SQL?

MySQL – Distinct Values To get unique or distinct values of a column in MySQL Table, use the following SQL Query. 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.

Does select distinct apply to all columns?

Yes, DISTINCT works on all combinations of column values for all columns in the SELECT clause.

How do I get a single column in SQL?

The SQL SELECT Statement

1. SELECT column1, column2, FROM table_name;
2. SELECT * FROM table_name;
3. Example. SELECT CustomerName, City FROM Customers;
4. Example. SELECT * FROM Customers;

What is SELECT distinct?

The SELECT DISTINCT statement is used to return only distinct (different) values. Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values.

How do you SELECT unique records from a table?

SELECT DISTINCT returns only unique (i.e. distinct) values. SELECT DISTINCT eliminates duplicate values from the results. DISTINCT can be used with aggregates: COUNT, AVG, MAX, etc. DISTINCT operates on a single column.

Can you SELECT multiple distinct columns in SQL?

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.

Can we apply distinct on single column in SQL?

SQL SELECT DISTINCT Explanation SELECT DISTINCT returns only unique (i.e. distinct) values. SELECT DISTINCT eliminates duplicate values from the results. DISTINCT can be used with aggregates: COUNT, AVG, MAX, etc. DISTINCT operates on a single column.

Can we use distinct on multiple columns in Oracle?

In SQL multiple fields may also be added with DISTINCT clause. DISTINCT will eliminate those rows where all the selected fields are identical.

What is SELECT DISTINCT in MySQL?

The MySQL Select Distinct behaviour is inherits from the Group By. If you use the Group By Clause without any Aggregate Function then it will act as the Distinct keyword. And the Only difference between them is: Group By will sort the Data first, and then perform grouping. Distinct keyword does not perform any sorting.

How to select distinct SQL?

How to Use SQL SELECT DISTINCT Statement to Retrieve Unique Data Using the DISTINCT clause with the SELECT statement is the simple method. You just need to put the DISTINCT clause after the SELECT statement. Then after you have to specify the column name from which you want to fetch only the distinct values and not the duplicate values.

How do you use distinct in SQL?

Using SQL DISTINCT. The SQL Distinct command can be used in the SELECT statement to ensure that the query returns only distinct (unique) rows. When the query is selecting the rows it discards any row which is a duplicate of any other row already selected by the query.