Selva Prabhakaran

Problem You need to retrieve a list of dates between two specified dates. Input First, let’s create a table and insert some sample data into it. startDate endDate 2023-01-01 2023-01-05 2023-02-01 2023-02-03 For this example, the table contains two date ranges: Jan 1 to Jan 5 and Feb 1 to Feb 3 of 2023. Try

The difference between CROSS JOIN and INNER JOIN in SQL The question here is about the difference between a CROSS JOIN and an INNER JOIN in SQL. While both can be used to combine rows from two or more tables, they do so in distinct ways: CROSS JOIN: Combines each row of the first table

Problem You have two tables, tableA and tableB. You want to retrieve all records from tableA that do not have a matching record in tableB based on a specific column. Input Let’s start with creating two tables and populating them with data. tableA – This will be our primary table where we’ll select data from.

Problem How to access the “previous row” value in a SELECT statement in SQL? Input id sale_date units_sold 1 2023-01-01 10 2 2023-01-02 15 3 2023-01-03 12 4 2023-01-04 20 Try Hands-On: HERE Source Tables: Gist Desired Solution sale_date current_day_sales previous_day_sales 2023-01-01 10 2023-01-02 15 10 2023-01-03 12 15 2023-01-04 20 12 Solution 1: To