Understanding Subquery and Common Table Expressions(CTEs)

try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3564637) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Gabriel Njoroge Posted on Apr 28 Understanding Subquery and Common Table Expressions(CTEs) #beginners #tutorial #database #sql What is a Subquery? A subquery is simply a select statement written inside another select statement. The inside query runs first and results is handed to outer query for use. Example: Explanation i)First it finds the Average Score ii)It finds all rows which are greater than the Average score. Types of Subqueries 1.

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