Retail-Sales-Analysis-SQL-Project/SQLQuery2 - Data Cleaning.sql at main · UnbeatenAnalytics/Retail-Sales-Analysis-SQL-Project · GitHub

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-- Data Cleaning for our Retail Sales Table
USE Retail_Sales_db

-- Checking Count of Records (COUNT INITIAL - 2000)
SELECT
	COUNT(*) As Total_Records
FROM Retail_Sales;

-- Total Columns
SELECT TOP 1 * FROM Retail_Sales;

-- Checking for Nulls
SELECT * FROM Retail_Sales
WHERE
	transactions_id IS NULL
	OR
	sale_date IS NULL
	or
	sale_time IS NULL
	or
	customer_id IS NULL
	or
	gender IS NULL
	or
	age IS NULL
	or
	category IS NULL
	or
	quantiy IS NULL
	or
	price_per_unit IS NULL
	or
	cogs IS NULL
	or
	total_sale IS NULL;

-- DELETE These null records from table
DELETE FROM Retail_Sales
WHERE
	transactions_id IS NULL
	OR
	sale_date IS NULL
	or
	sale_time IS NULL
	or
	customer_id IS NULL
	or
	gender IS NULL
	or
	age IS NULL
	or
	category IS NULL
	or
	quantiy IS NULL
	or
	price_per_unit IS NULL
	or
	cogs IS NULL
	or
	total_sale IS NULL;


-- COUNT of rows after deleting all nulls.
SELECT COUNT(*) AS total_rows FROM Retail_Sales;