from sqlglot import parse_one sql='''SELECT 1 FROM ( SELECT 1 ) AS t1( c ), (SELECT (SELECT 1 FROM (FROM ( SELECT 1 ) AS t2( c ), (SELECT t2.c AS c0, t1.c AS c1 ...
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 ...
Abstract: Expressing complex OLAP queries involving nested expressions using normal group-by, aggregation, and joins can be extremely difficult. We propose a technique that translates nested query ...