For those new to data analysis, I have compiled a list of free sites where you can practice SQL, methods for setting up your own practice environment, and 10 practice problems to review the content of ...

Build a Python tracker for the Nintendo Switch 2 games list: scrape, dedupe, alert on new releases, and export a shareable ...

本文将围绕索引本质、底层数据结构、存储引擎实现机制、索引分类、索引增删操作、索引失效场景与设计规范展开完整讲解。在 MySQL 性能优化体系中，索引是最核心、最高效、使用最 ...

Note: This repository contains benchmarks derived from the TPC benchmarks. Our benchmarks use the schema, data, and queries derived from the TPC benchmarks; however, they are not official TPC ...

SQL injection remains the most reliably exploited web vulnerability in 2026. According to the Verizon 2025 Data Breach Investigations Report, injection attacks account for 17% of all confirmed data ...

In this tutorial, learn how to clone a table with T-SQL. Specifically, you learn how to create a table clone with the CREATE TABLE AS CLONE OF T-SQL statement. In this task, learn how to clone a table ...

In this tutorial, we demonstrate how we use Ibis to build a portable, in-database feature engineering pipeline that looks and feels like Pandas but executes entirely inside the database. We show how ...

This QuickStart provides instructions on how to set up Sigma's Google Analytics 4 template. This template gives you a prebuilt analytics package for Google Analytics 4 events data, including detailed ...

In this Quickstart guide, we will play the role of a data scientist at a telecom company that wants to identify users who are at high risk of churning. To accomplish this, we need to build a model ...

Data teams across organizations face the same recurring challenge: stakeholders require regular reports, but manual SQL reporting consumes valuable time that could be spent on analysis. The process ...

CREATE TABLE Employee ( EmployeeID INT, EmployeeName VARCHAR(100) ); INSERT INTO Employee (EmployeeID, EmployeeName) VALUES (1, 'Alice'), (2, 'Bob'), (3, 'Charlie ...