This can be done simply by following the below steps: Open MySQL Command Line Insert the user name and the password mysql > use your_database; mysql > source file_path_with_file_name.sql Below is the screenshot of importing create_tables.sql SQL file located at “D:\” drive in “sakila” Database. Sign up for a 14-day trial of Datameer […]
The SQL operator NOT IN and NOT EXISTS may seem similar at first glance, but there are differences between them. Let us set up the tables ‘orders’ and ‘order_details’ as below: CREATE TABLE orders ( order_id INT, customer_name VARCHAR(100), order_date DATETIME, total_orders INT ); INSERT INTO orders […]
Let us set up a ‘customers’ table with their email addresses: CREATE TABLE customers ( customers_id INT, customer_name VARCHAR(100), email VARCHAR(100) ); INSERT INTO customers SELECT 1, ‘Jack’, ‘jack@email.com’ UNION ALL SELECT 2, ‘July’, ‘jack@email.com’ UNION ALL SELECT 3, ‘John’, ‘john@email.com’ UNION ALL SELECT 4, ‘Rose’, ‘rose@email.com’; We can […]
Let’s create the two tables ‘order’ and ‘order_detail.’ We can update the data of a table using conditions of other joined tables. It is possible to join two or more tables in an UPDATE query. CREATE TABLE orders ( order_id INT PRIMARY KEY, customer_name VARCHAR(100), order_date DATETIME, total_orders INT […]
The main differences between UNION and UNION ALL are: a) UNION combines the two datasets into one and then removes the duplicate data UNION ALL combines the two datasets into one and but do not removes the duplicate data; b) Since the UNION ALL do not removes duplicate data, its performance is better than that […]
We can perform ‘Like’ operations in MongoDB using regular expressions. In fact, regular expressions are more powerful than the Like operator. Let us consider the following collection: db = { “fruits”: [ {“name”: “apple” }, { “name”: “pineapple” […]
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