chapter 1

.vscode/settings.json

@@ -3,7 +3,7 @@
   "editor.cursorBlinking": "solid",
   "editor.fontFamily": "ui-monospace, Menlo, Monaco, 'Cascadia Mono', 'Segoe UI Mono', 'Roboto Mono', 'Oxygen Mono', 'Ubuntu Monospace', 'Source Code Pro', 'Fira Mono', 'Droid Sans Mono', 'Courier New', monospace",
   "editor.fontLigatures": false,
-  "editor.fontSize": 22,
+  "editor.fontSize": 14,
   "editor.formatOnPaste": true,
   "editor.formatOnSave": true,
   "editor.lineNumbers": "on",

queries/00_01/select.sql

@@ -1 +1,92 @@
-select * from dept_tab;
+SELECT * FROM emp_tab;
+
+SELECT empno, name, salary
+FROM emp_tab
+WHERE name  = 'KING';
+
+SELECT * 
+FROM emp_tab
+WHERE name LIKE '_C%';
+
+SELECT * FROM emp_tab
+WHERE deptno IN (30, 40);
+
+SELECT * FROM emp_tab
+WHERE deptno NOT IN (30, 40);
+
+SELECT * FROM emp_tab
+WHERE salary BETWEEN 2000 AND 6000;
+
+SELECT * FROM emp_tab
+WHERE salary IN (2975, 3000);
+
+SELECT * FROM emp_tab
+WHERE manager IS NULL;
+
+SELECT * FROM emp_tab
+WHERE name LIKE 'S%' AND deptno = 30;
+
+SELECT * FROM emp_tab
+WHERE name LIKE 'S%' OR deptno = 30;
+
+SELECT * FROM emp_tab
+WHERE name NOT LIKE 'S%' OR deptno = 30;
+
+SELECT * FROM emp_tab
+WHERE deptno = 30 ORDER BY salary;
+
+SELECT * FROM emp_tab
+WHERE deptno = 30 ORDER BY salary DESC;
+
+SELECT * FROM emp_tab
+ORDER BY deptno, salary;
+
+SELECT * FROM emp_tab
+ORDER BY salary, deptno;
+
+SELECT ROUND(32.3322424242, 3) FINAL;
+
+SELECT * FROM emp_tab;
+
+SELECT name, job, salary,
+CASE job WHEN 'MANAGER' THEN 2*salary
+         WHEN 'ANALYST' THEN 1.5*salary
+         WHEN 'CLERK' THEN 1.2*salary
+         ELSE salary
+         END 'Revised Salary'
+FROM emp_tab;
+
+SELECT SUM(salary) FROM emp_tab;
+SELECT AVG(salary) FROM emp_tab;
+SELECT MIN(salary) FROM emp_tab;
+SELECT MAX(salary) FROM emp_tab;
+SELECT COUNT(salary) FROM emp_tab;
+
+SELECT COUNT(name) FROM emp_tab
+WHERE manager=7003;
+
+SELECT COUNT(DISTINCT(salary)) FROM emp_tab;
+SELECT COUNT(salary) FROM emp_tab;
+
+SELECT MAX(salary), manager
+FROM emp_tab
+GROUP BY manager
+ORDER BY MAX(salary) DESC;
+
+SELECT MAX(salary), deptno
+FROM emp_tab
+GROUP BY deptno;
+
+SELECT deptno, MAX(salary)
+FROM emp_tab
+GROUP BY deptno;
+
+SELECT deptno, MAX(salary)
+FROM emp_tab
+GROUP BY deptno
+HAVING MAX(salary) < 3000;
+
+SELECT deptno, MAX(salary)
+FROM emp_tab;
+
+SELECT * FROM country_tab;