Today, We want to share with you use distinct in sql.In this post we will show you sql distinct vs unique, hear for select distinct on one column, with multiple columns returned sql we will give you demo and example for implement.In this post, we will learn about sql unique count and use removes the duplicate values in sql with an example.
Using SQL SELECT DISTINCT COUNT ROWS Example
There are the Following The simple About sql removes the duplicate values on one column Full Information With Example and source code.
As I will cover this Post with live Working example to develop sql count(removes the duplicate values multiple columns), so the how to use removes the duplicate values in sql with join two tables is used for this example is following below.
Use the SQL DISTINCT keyword is used in conjunction as well as the MySQL SELECT query statement to eliminate all the duplicate or multiple rows and getting only unique rows.
SQL SELECT DISTINCT Statement
SELECT DISTINCT Syntax
SELECT DISTINCT column1, column2, ... FROM database_table_name;
SELECT Example Without DISTINCT
SELECT Vender FROM Products;
SELECT DISTINCT Examples
SELECT DISTINCT Vender FROM Products; // The following SQL statement lists the number of different (removes the duplicate values) Product Venders: SELECT COUNT(DISTINCT Vender) FROM Products;
SELECT Count(*) AS DistinctCountries FROM (SELECT DISTINCT Vender FROM Products);
SQL – Distinct Keyword
SQL> SELECT Vender FROM Products ORDER BY Vender;
SQL> SELECT DISTINCT Vender FROM Products ORDER BY Vender;
DISTINCT with null values example
SELECT DISTINCT price FROM sales.products ORDER BY price;
DISTINCT vs. GROUP BY
SELECT p_desc, p_calsfic, price FROM sales.products GROUP BY p_desc, p_calsfic, price ORDER BY p_desc, p_calsfic, price
uses the DISTINCT operator :
SELECT DISTINCT p_desc, p_calsfic, price FROM sales.products;
Example – With Single Expression
SELECT DISTINCT p_code FROM products WHERE product_id >= 50;
Example – With Multiple Expressions
SELECT DISTINCT p_name, p_code FROM products WHERE product_id >=50 ORDER BY p_code;
I hope you get an idea about use distinct in sql.
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