How can I select distinct records from two tables in SQL?

How can I select distinct records from two tables in SQL?

Contents:

1. Sample Select statement.
2. Select with distinct on two columns.
3. Select with distinct on three columns.
4. Select with distinct on all columns of the first query.
5. Select with distinct on multiple columns and order by clause.
6. Count() function and select with distinct on multiple columns.

How do I select two tables from different databases?

Join Tables from Different Databases in SQL Server

1. Step 1: Create the first database and table.
2. Step 2: Create the second database and table.
3. Step 3: Join the tables from the different databases in SQL Server.
4. Step 4 (optional): Drop the databases created.

How do I SELECT two columns from different tables in SQL?

Example syntax to select from multiple tables:

1. SELECT p. p_id, p. cus_id, p. p_name, c1. name1, c2. name2.
2. FROM product AS p.
3. LEFT JOIN customer1 AS c1.
4. ON p. cus_id=c1. cus_id.
5. LEFT JOIN customer2 AS c2.
6. ON p. cus_id = c2. cus_id.

How to select distinct from two different tables?

I have 2 different tables that each have a column called product_type. How can I get the DISTINCT values of product_type across both tables? Just to clarify, if both tables have a product_type of “diamond” I only want it returned once.

When to use distinct and multiple fields in SQL?

In SQL multiple fields may also be added with DISTINCT clause. DISTINCT will eliminate those rows where all the selected fields are identical. Here is a simple query on some selected columns in orders table where agent_code =’A002′

How to get identical rows on multiple columns in SQL?

To get the identical rows (based on three columns agent_code, ord_amount, and cust_code) once from the orders table, the following SQL statement can be used: 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 :

How to count distinct rows in select statement?

You can use the count () function in a select statement with distinct on multiple columns to count the distinct rows. Here is an example: More to come! Want to improve the above article?