Data work in 2026 asks for more than chart building. Professionals are expected to clean data, query databases, explain ...
-- Write a query to find employees whose name starts with 'A'.
UPDATE Employees SET manager_id = 108 WHERE dept_id = 1 AND emp_id NOT IN (108); UPDATE Employees SET manager_id = 109 WHERE emp_id IN (110,111,124,125,126,142,143); UPDATE Employees SET manager_id = ...
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