Your SQL queries running slow even with indexes? Discover how covered indexes eliminate key lookups and dramatically improve performance. The Problem: Non-Covered Index — Table structure CREATE TABLE Orders ( Id INT PRIMARY KEY, CustomerId INT, OrderDate DATETIME, TotalAmount DECIMAL(10,2), Status VARCHAR(50), ShippingAddress NVARCHAR(500), — 20 more columns… ); — Common query SELECT CustomerId, OrderDate, […]