Data Interview Qs - Lifetime of a customer

Lifetime of a customer
SQL Database Querying

Suppose you work for a large eCommerce company. You're given the below table schema for a table called 'orders' that highlights eCommerce purchases since the company's inception:


Table: orders

order_id customer_id created_at
unique id of the order unique id of the customer
associated with the given order
the date the order was made

Additionally you're provided the below table schema, called 'customers' containing the customer's unique id, as well as their name:


Table: customers

customer_id name address
unique id of the customer name of the customer shipping address of the customer

Given the above, write a SQL query to return the name and address of your first 100 customers.
(Your company wants to send gift cards + thank you notes and needs this information).





Want the solutions? Upgrade to premium to access detailed solutions to each problem (including this one).

Was this email forwarded to you? You can join our list here to receive questions


Unsubscribe

Older messages

Similarity Matrix and Heat Chart

Friday, November 6, 2020

Data Interview Qs Similarity Matrix and Heat Chart Data Analysis Python Pandas Data Manipulation Data Visualization Similarity Matrix Heat Chart External Dataset Suppose you have the following dataset

Reverse it

Monday, November 2, 2020

Data Interview Qs Reverse it Python String Manipulation Suppose you're given an array of strings, s. Write a function using Python to take each string in the array and reverse it. For example: #

Querying types of widgets

Friday, October 30, 2020

Data Interview Qs Querying types of widgets SQL Database Querying Rank Function Window Function Suppose that each day widgets are produced on 3 assembly lines (A, B, and C) and eventually end up on one

Calorically dense foods

Wednesday, October 28, 2020

Data Interview Qs Calorically dense foods Data Analysis Python Pandas Data Manipulation Suppose you are given the following dataframe containing food, weight, and calories. You'll notice the foods

MSE vs. RMSE

Monday, October 26, 2020

Data Interview Qs MSE vs. RMSE Statistics Mean Squared Error Root Mean Squared Error Explain what Mean Squared Error (MSE) and Root Mean Squared Error (RMSE) are. What are the similarities between the

You Might Also Like

SRE Weekly Issue #423

Monday, May 6, 2024

View on sreweekly.com A message from our sponsor, FireHydrant: FireHydrant is now AI-powered for faster, smarter incidents! Power up your incidents with auto-generated real-time summaries,

⚠️ Avoiding AI Scams on Social Media — An Open Source Google Photos Alternative

Sunday, May 5, 2024

Also: Reviewing the Customizable Drop Mechanical Keyboard, and More! How-To Geek Logo May 5, 2024 📩 Get expert reviews, the hottest deals, how-to's, breaking news, and more delivered directly to

Daily Coding Problem: Problem #1432 [Medium]

Sunday, May 5, 2024

Daily Coding Problem Good morning! Here's your coding interview problem for today. This question was asked by Snapchat. Given the head to a singly linked list, where each node also has a “random”

PD#572 Good Ideas in Computer Science

Sunday, May 5, 2024

Ideas every programmer likes and why Garbage Collection and Object Oriented Programming don't count ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌

RD#454 API Layer & Fetch Functions

Sunday, May 5, 2024

ixing API and UI code quickly leads to messy and unmaintainable code ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌

The Shiny Toy Syndrome & Tiny macOS utility apps I love

Sunday, May 5, 2024

Lex launching its redesign, Raycast shares another monthly update packed with AI updates, prompts should be designed not engineered, and a lot more in this week's issue of Creativerly. Creativerly

Hyundai antes up $1B for AV startup Motional and Elon unplugs the Tesla Supercharger team

Sunday, May 5, 2024

Plus, layoffs come for Luminar, Fisker and Ola View this email online in your browser By Kirsten Korosec Sunday, May 5, 2024 Image Credits: Motional Welcome back to TechCrunch Mobility — your central

C#504 Adventures serializing absolutely everything in C#

Sunday, May 5, 2024

A fantastic journey porting Newtonsoft.Json to System.Text.Json ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌

Sunday Digest | Featuring 'Which City Has the Most Billionaires in 2024?' 📊

Sunday, May 5, 2024

Every visualization published this week, in one place. Visual Capitalist Sunday Digest logo May 5, 2024 | View Online | Subscribe | VC+ The Best of This Week's Visuals Presented by Voronoi: The

The dark side of startup accelerators

Sunday, May 5, 2024

Plus: No easy solution to AI hallucinations View this email online in your browser By Anthony Ha Sunday, May 5, 2024 Image Credits: Bryce Durbin This Week, TechCrunch dug into the struggles at two