Not exists and subquery of constant value
mysql>
mysql>
mysql>
mysql> CREATE TABLE EmployeeS(
-> EmployeeNO INTEGER NOT NULL,
-> NAME CHAR(15) NOT NULL,
-> INITIALS CHAR(3) NOT NULL,
-> BIRTH_DATE DATE ,
-> SEX CHAR(1) NOT NULL,
-> JOINED SMALLINT NOT NULL,
-> STREET VARCHAR(30) NOT NULL,
-> HOUSENO CHAR(4) ,
-> POSTCODE CHAR(6) ,
-> TOWN VARCHAR(30) NOT NULL,
-> PHONENO CHAR(13) ,
-> LEAGUENO CHAR(4) ,
-> PRIMARY KEY (EmployeeNO) );
Query OK, 0 rows affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (2, 'Jack', 'R', '1948-09-01', 'M', 1975, 'Stoney Road','43', '3575NH', 'Stratford', '070-237893', '2411');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (6, 'Link', 'R', '1964-06-25', 'M', 1977, 'Haseltine Lane','80', '1234KK', 'Stratford', '070-476537', '8467');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (7, 'Wise', 'GWS', '1963-05-11', 'M', 1981, 'First Way','39', '9758VB', 'Stratford', '070-347689', NULL);
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (8, 'Mary', 'B', '1962-07-08', 'F', 1980, 'Station Road','4', '6584WO', 'Inglewood', '070-458458', '2983');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (27, 'Collins', 'DD', '1964-12-28', 'F', 1983, 'Long DRay','804', '8457DK', 'Eltham', '079-234857', '2513');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (28, 'Collins', 'C', '1963-06-22', 'F', 1983, 'Old Main Road','10', '1294QK', 'Midhurst', '010-659599', NULL);
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (39, 'Bishop', 'D', '1956-10-29', 'M', 1980, 'Eaton Square','78', '9629CD', 'Stratford', '070-393435', NULL);
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (44, 'Baker', 'E', '1963-01-09', 'M', 1980, 'Lewis Street','23', '4444LJ', 'Inglewood', '070-368753', '1124');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (57, 'Brown', 'M', '1971-08-17', 'M', 1985, 'First Way','16', '4377CB', 'Stratford', '070-473458', '6409');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (83, 'Hope', 'PK', '1956-11-11', 'M', 1982, 'Main Road','16A', '1812UP', 'Stratford', '070-353548', '1608');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (95, 'Miller', 'P', '1963-05-14', 'M', 1972, 'High Street','33A', '5746OP', 'Douglas', '070-867564', NULL);
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (100, 'Link', 'P', '1963-02-28', 'M', 1979, 'Haseltine Lane','80', '6494SG', 'Stratford', '070-494593', '6524');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (104, 'Jane', 'D', '1970-05-10', 'F', 1984, 'Stout Street','65', '9437AO', 'Eltham', '079-987571', '7060');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO EmployeeS VALUES (112, 'Bailey', 'IP', '1963-10-01', 'F', 1984, 'Vixen Road','8', '6392LK', 'Plymouth', '010-548745', '1319');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql>
mysql>
mysql> CREATE TABLE TEAMS
-> (TEAMNO INTEGER NOT NULL,
-> EmployeeNO INTEGER NOT NULL,
-> DIVISION CHAR(6) NOT NULL,
-> PRIMARY KEY (TEAMNO) );
Query OK, 0 rows affected (0.00 sec)
mysql>
mysql>
mysql> INSERT INTO TEAMS VALUES (1, 6, 'first');
Query OK, 1 row affected (0.00 sec)
mysql> INSERT INTO TEAMS VALUES (2, 27, 'second');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql> SELECT NAME, INITIALS
-> FROM EmployeeS
-> WHERE NOT EXISTS
-> (SELECT 'nothing'
-> FROM TEAMS
-> WHERE EmployeeNO = EmployeeS.EmployeeNO);
+---------+----------+
| NAME | INITIALS |
+---------+----------+
| Jack | R |
| Wise | GWS |
| Mary | B |
| Collins | C |
| Bishop | D |
| Baker | E |
| Brown | M |
| Hope | PK |
| Miller | P |
| Link | P |
| Jane | D |
| Bailey | IP |
+---------+----------+
12 rows in set (0.00 sec)
mysql>
mysql>
mysql> drop table Employees;
Query OK, 0 rows affected (0.00 sec)
mysql> drop table teams;
Query OK, 0 rows affected (0.00 sec)
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