SQL Language - Video 25 Part 2: Subqueries with EXISTS - NOT EXISTS (3/4)
#sql #sql_language #subqueries
✔ Subqueries are a very powerful SQL tool and are used in many situations and complex problems.
✔ Subqueries in SQL allow us to gain efficiency by writing fewer SQL queries to execute our tasks.
✔ Today's video focuses on the use of subqueries in the SQL WHERE clause and with the EXISTS and NOT EXISTS operators.
✔ The video will cover the definition of EXISTS, its characteristics, its syntax in an SQL query, and examples of applications in dependent SQL subqueries and independent SQL subqueries.
✔ Links to previous subquery videos:
✅ Introduction to subqueries: • Langage SQL - Vidéo 23: Les Sous-Requêtes ...
✅ Subqueries in the SELECT and FROM clauses: • Langage SQL - Vidéo 24 Partie 1: Les Sous-...
✅ SQL subqueries in the WHERE clause with comparison operators and the IN and NOT IN keywords: • Langage SQL - Vidéo 24 Partie 2: Les Sous-...
✅ SQL subqueries in the WHERE clause with the SOME, ANY, and ALL operators: • Langage SQL - Vidéo 25 Partie 1: Les Sous-...