[서희] 유형4: FULL OUTER JOIN & 유형5: GROUP BY by seohee-P · Pull Request #8 · Octopus-Leg/sql-octopus-leg

seohee-P · 2026-03-14T04:29:13Z

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+              SELECT
+                  e.name,
+                  e.department,
+                  e.salary,
+                  s.avg
+              FROM employee AS e
+              LEFT OUTER JOIN (
+                  SELECT department,
+                         ROUND(AVG(salary), 2) AS avg
+                  FROM employee
+                  GROUP BY department
+              ) AS s
+              ON e.department = s.department;