長くて複雑なSQLは、書くのも読むのも大変です。できるだけ見やすく分かりやすいクエリを書きたいですよね。 長いクエリでは、「サブクエリ」が使われていることが多いです。 そもそもサブクエリとは サブクエリ（Subquery）とは、SQL文内に含まれる別の ...

Boost your SQL interview readiness with these 35 carefully selected SQL Interview Questions and Answers. Includes real-world ...

The amount of data generated continues to grow rapidly, making it increasingly important for businesses to be able to wrangle this data and understand it quickly and efficiently. Although data ...

Organizations are using generative AI to stay ahead of the competition, but the real advantage lies in harnessing the power of your own data securely and at scale. One of the most exciting new ...

Choose a SQL Server trial, edition, tool, or connector that best meets your data and workload needs. Accelerate AI development with SQL Server 2025, the AI-ready enterprise database with best-in-class ...

This is a simple example of a chatbot that uses Azure SQL to store and retrieve data using both RAG and Natural-Language-to-SQL (NL2QL) to allow chat on both structured and non-structured data. The ...

1 What is an inner join in SQL? 1 What is an outer join in SQL? 1 What is full join in SQL? 1 What is left join in SQL Server? 1 What is a right join in SQL Server? 1 What is database engine in SQL ...