【SQL超入門講座】13.AND, OR｜複数条件で抽出する方法

SQLで覚えるべき書き方はSELECT文だけ！SELECT文とWHERE句・集計関数をマスターしよう！｜スタビジ

Set Operations

An introduction to set-based vs procedural programming approaches in T-SQL

This article explores the SQL variables using SET and Select SQL Statements.

SQL examples for beginners: SQL SELECT statement usage

SQL JOINs for Beginners

SQL Join types overview and tutorial

Joins explained - SQL Video Tutorial | LinkedIn Learning, formerly Lynda.com