CREATE TABLE Doctors ( doctor_id INT AUTO_INCREMENT PRIMARY KEY, doctor_name VARCHAR(100) NOT NULL, specialization VARCHAR(100), phone VARCHAR(15) ); CREATE TABLE Patients ( patient_id INT ...
Notably, SubQuery is not the first indexing protocol to launch a decentralized data aggregation, indexing, and querying layer on Ethereum. But despite being a beta release, SubQuery’s Ethereum support ...
1️) Scalar Subquery in SELECT: SELECT e.emp_id, e.emp_name, e.salary, (SELECT ROUND(AVG(salary), 2) FROM employees WHERE dept_id = e.dept_id) AS dept_avg_salary FROM employees e; 2️) Correlated ...
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