How to select with distinct on two columns?

Can you use select distinct with multiple columns?

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.

How do I select distinct two columns in MySQL?

To select distinct values in two columns, you can use least() and greatest() function from MySQL.

Can we use count distinct in two columns in SQL?

but when we want to count distinct column combinations, we must either clumsily concatenate values (and be very careful to choose the right separator): select count(distinct col1 || '-' || col2) from mytable; or use a subquery: select count(*) from (select distinct col1, col2 from mytable);

How to use distinct with two columns in SQL?

Example: SELECT with DISTINCT on two columns. To get the identical rows (based on two columns agent_code and ord_amount) once from the orders table, the following SQL statement can be used : SQL Code: SELECT DISTINCT agent_code,ord_amount FROM orders WHERE agent_code='A002'; Output:

How to count the number of distinct rows in a column?

You can use the count () function in a select statement with distinct on multiple columns to count the distinct rows. Here is an example: SELECT COUNT(*) FROM (SELECT DISTINCT agent_code, ord_amount, cust_code FROM orders WHERE agent_code ='A002');

How do you select on multiple columns in SQL?

Select with distinct on multiple columns and order by clause You can use an order by clause in select statement with distinct on multiple columns. Here is an example : SELECT distinct agent_code,ord_amount FROM orders WHERE agent_code='A002' order by ord_amount;

How do I get identical rows on all columns in SQL?

Example : SELECT with DISTINCT on all columns of the first query. To get the identical rows (on four columns agent_code, ord_amount, cust_code, and ord_num) once from the orders table , the following SQL statement can be used : SQL Code: