Add emp-dept exercises.

1/GBD/assignments/ej-emp-dept.sql

@@ -0,0 +1,56 @@
+-- 1
+SELECT ename FROM emp WHERE sal > (SELECT sal FROM emp WHERE ename = 'JAMES');
+
+-- 2
+SELECT ename FROM emp WHERE deptno = (SELECT deptno FROM emp WHERE ename='SMITH');
+
+-- 3
+SELECT ROUND(AVG(sal), 2) FROM emp WHERE deptno = (SELECT deptno FROM emp WHERE ename='JAMES');
+
+-- 4
+SELECT ename FROM emp WHERE hiredate < (SELECT hiredate FROM emp WHERE ename='MILLER');
+
+-- 5
+SELECT ename FROM emp WHERE deptno = (SELECT deptno FROM emp WHERE ename='FORD') AND
+	sal > (SELECT sal FROM emp WHERE ename='JAMES');
+
+-- 6
+SELECT dept.dname FROM emp JOIN dept ON emp.deptno = dept.deptno WHERE ename='SCOTT';
+
+-- 7
+SELECT COUNT(*) FROM emp WHERE sal < (SELECT sal FROM emp WHERE ename='MILLER');
+
+-- 8
+SELECT dept.loc FROM emp JOIN dept ON emp.deptno = dept.deptno WHERE emp.ename='KING';
+
+-- 9
+SELECT DISTINCT dept.dname FROM emp JOIN dept ON emp.deptno = dept.deptno WHERE emp.job='CLERK';
+
+-- 10
+SELECT DISTINCT dname FROM dept WHERE deptno NOT IN (SELECT deptno FROM emp WHERE job = 'ANALYST');
+
+-- 11
+SELECT ename FROM emp JOIN dept ON emp.deptno = dept.deptno WHERE dept.loc = 'DALLAS' ORDER BY ename;
+
+-- 12
+SELECT ename, sal FROM emp WHERE job = (SELECT job FROM emp WHERE ename='JONES') AND ename != 'JONES';
+
+-- 13
+SELECT * FROM emp
+	WHERE deptno = (SELECT deptno FROM emp WHERE ename='SCOTT') AND
+	sal > (SELECT sal FROM emp WHERE ename='SMITH') AND
+	job = (SELECT job FROM emp WHERE ename='MILLER');
+
+-- 14
+SELECT * FROM emp
+	WHERE deptno = (SELECT deptno FROM emp WHERE ename='MARTIN') AND
+	sal = (SELECT sal FROM emp WHERE ename='MARTIN');
+
+-- 15
+SELECT ename, sal FROM emp
+	WHERE deptno = (SELECT deptno FROM emp WHERE ename='FORD') AND
+	sal = (SELECT sal FROM emp WHERE ename='FORD')
+	ORDER BY ename ASC, sal DESC;
+
+-- 16
+SELECT MAX(sal) FROM emp GROUP BY deptno HAVING deptno IN (10, 20);