Updates

Author: ElmerTucker

working files/ch7 assignment - dept employee.sql

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+use employees;
+-- show department employee
+-- Department Name, First Name, Last Name, and Title
+-- Limit to active in department, active to title, order by department, last name
+SELECT dept_name, emp.first_name, emp.last_name, title
+FROM employees AS emp
+INNER JOIN dept_emp AS team
+ON emp.emp_no = team.emp_no
+INNER JOIN departments
+ON team.dept_no = departments.dept_no
+INNER JOIN titles
+ON emp.emp_no = titles.emp_no
+WHERE team.to_date >= '9999-01-01'
+AND titles.to_date >= '9999-01-01'
+ORDER BY dept_name, last_name
+;

working files/ch7.sql

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+use employees;
+SELECT first_name, last_name FROM employees
+INNER JOIN 
+    dept_manager
+    ON employees.emp_no = dept_manager.emp_no
+WHERE from_date > '1990-01-01' AND to_date > '1995-01-01';
+
+-- Want to find the name of the department manager for department 3
+
+-- Using aliases (emp, dm, dept)
+SELECT  emp.emp_no, first_name, last_name, dept.dept_name, gender
+FROM employees as emp
+JOIN dept_emp as team
+ON emp.emp_no = team.emp_no
+JOIN departments as dept
+ON team.dept_no = dept.dept_no
+JOIN salaries as sal
+ON emp.emp_no = sal.emp_no
+WHERE dept_name = 'Quality Management' AND gender = 'F'
+GROUP BY emp.emp_no
+ORDER BY last_name ASC;
+
+-- some extra stuff was throwing off group by issues
+
+-- Get a list of current managers, creating a full name alias
+SELECT  dept_name
+       ,CONCAT(first_name, " ", last_name) as fullName
+       , gender
+FROM employees AS emp
+JOIN dept_manager AS dm
+ON emp.emp_no = dm.emp_no
+JOIN departments AS dept
+ON dm.dept_no = dept.dept_no
+WHERE dm.to_date >= '9999-01-01'
+-- AND emp.gender = 'F' would only show ladies
+ORDER BY dept_name ASC
+;
+

working files/chapter8-assignment.sql

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+use employees;
+-- create employee record
+-- create title record
+-- create employe department record
+-- create employee salary record
+
+INSERT INTO (employees, titles, dept_emp, salaries)
+(SELECT  MAX(emp_no) +1
+       ,"1984-03-24"
+       ,"Elmer"
+       ,"Tucker"
+       ,"M"
+       ,"2006-09-12"), 
+       (SELECT  MAX(emp_no) +1
+       ,"Grand Poobah"
+       ,"2006-01-01"
+       ,"9999-01-01"), 
+       (SELECT  MAX(emp_no) +1
+       ,"d010"
+       ,"2006-01-01"
+       ,"9999-01-01"), 
+       (SELECT  MAX(emp_no) +1
+       ,105000
+       ,"2006-01-01"
+       ,"9999-01-01"), 
+FROM employees;
+
+INSERT INTO employees SELECT MAX(emp_no) +1
+       ,"1984-03-24"
+       ,"Elmer"
+       ,"Tucker"
+       ,"M"
+       ,"2006-09-12" FROM employees;
+
+INSERT INTO titles SELECT emp_no where 

working files/chapter8-assignment.txt

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+use employees;
+
+-- INSERT INTO departments VALUES ('d011', 'Quiz Wizards');
+
+SELECT * from employees;
+
+-- insert INTO employees VALUES(SELECT max(emp_no), "1984-03-24", "Elmer", "Tucker", "M", "2006-09-12");
+INSERT INTO employees
+SELECT  MAX(emp_no) +1
+       ,"1984-03-24"
+       ,"Elmer"
+       ,"Tucker"
+       ,"M"
+       ,"2006-09-12"
+FROM employees;
+
+-- select * from employees WHERE first_name = "Elmer";
+
+INSERT INTO employees
+SELECT  MAX(emp_no) +1
+       ,"1984-03-24"
+       ,"Elmer"
+       ,"Tucker"
+       ,"M"
+       ,"2006-09-12"
+FROM employees;

working files/chapter8.sql

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+use employees;
+-- Find Elvis' hired after 1990
+select emp_no from employees WHERE first_name = 'Elvis'
+AND hire_date > ('1990-01-01');
+

working files/elvis.sql

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+use employees;
+-- Using group by
+-- select first_name, count(*) from employees group by first_name;
+SELECT birth_date, count(*) from employees GROUP BY birth_date;
+SELECT birth_date, count(*) as birthday_friends from employees GROUP BY birth_date ORDER BY birthday_friends desc;
+SELECT salary, count(*) as sal_count from salaries group by salary order by sal_count desc;

working files/employee group by.sql

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+USE employees;
+
+SELECT  dept_name
+       ,emp.first_name
+       ,emp.last_name
+       ,title
+FROM employees AS emp, dept_emp AS team, departments, titles
+WHERE team.to_date >= '9999-01-01'
+AND titles.to_date >= '9999-01-01'
+AND emp.emp_no = team.emp_no
+AND titles.emp_no = emp.emp_no
+AND departments.dept_no = team.dept_no
+ORDER BY dept_name, last_name;
+
+-- new cartesian

working files/equijoins.sql

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+USE employees;
+
+SELECT * from employees where emp_no not in (SELECT emp_no from dept_manager);
+
+SELECT * from employees as emp LEFT JOIN dept_manager as dm ON emp.emp_no = dm.emp_no ORDER BY to_date ASC;
+
+SELECT emp.emp_no, dm.emp_no, first_name, last_name from employees as emp left join dept_manager as dm ON emp.emp_no = dm.emp_no WHERE dm.emp_no is not NULL;
+
+-- Assignment
+-- show employees without current title
+-- title are in the titles table
+-- current titles have a to_date equal to '9999-01-01'
+
+-- select employees, left join with titles, where title is null
+-- SELECT * FROM employees as emp LEFT JOIN titles ON emp.emp_no = titles.emp_no WHERE titles.title NOT IN ;
+SELECT * FROM employees as emp LEFT JOIN titles ON emp.emp_no = titles.emp_no WHERE titles.to_date != '9999-01-01';
+
+
+SELECT * from employees as emp where emp_no not in (select emp_no FROM titles where to_date = '9999-01-01');
+
+SELECT * from
+employees AS emp
+JOIN
+titles as t
+on emp.emp_no = t.emp_no 
+where emp.first_name = 'Elvis';

working files/outerjoins.sql

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+-- Create report showing by year: total, max, min, and average
+-- exclude managers
+-- managers are dfined in the table dept_manager
+-- use NOT IN
+
+use employees;
+
+select DATE_FORMAT(from_date, '%Y') as year FROM salaries;
+
+SELECT DISTINCT(emp_no) from dept_manager;
+
+SELECT  DATE_FORMAT(from_date,'%Y') AS year
+       ,SUM(salary)                 AS total
+       ,MAX(salary)                 AS max
+       ,MIN(salary)                 AS min
+       ,AVG(salary)                 AS average
+FROM salaries
+WHERE emp_no NOT IN ( SELECT DISTINCT(emp_no) FROM dept_manager)
+GROUP BY  YEAR;