Where clause: XOR : Where « Where Clause « SQL / MySQL

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SQL / MySQL » Where Clause » Where 
Where clause: XOR

/*
mysql> Drop table Books;
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE TABLE Books
    -> (
    ->    ID SMALLINT NOT NULL PRIMARY KEY,
    ->    Name VARCHAR(40) NOT NULL,
    ->    Category VARCHAR(15),
    ->    InStock SMALLINT NOT NULL,
    ->    OnOrder SMALLINT NOT NULL
    -> );
Query OK, 0 rows affected (0.11 sec)

mysql> INSERT INTO Books
    -> VALUES (101, 'On', 'Nonfiction', 13, 11),
    ->        (102, 'News', 'Fiction', 15, 21),
    ->        (103, 'Hello', 'Nonfiction', 21, 32),
    ->        (104, 'Poet', 'Nonfiction', 35, 13),
    ->        (105, 'Dunces', 'Fiction', 5, 35),
    ->        (106, 'One', 'Fiction', 28, 14),
    ->        (107, 'From', NULL, 46, 31);
Query OK, 7 rows affected (0.00 sec)
Records: 7  Duplicates: 0  Warnings: 0

mysql> select * from Books;
+-----+--------+------------+---------+---------+
| ID  | Name   | Category   | InStock | OnOrder |
+-----+--------+------------+---------+---------+
| 101 | On     | Nonfiction |      13 |      11 |
| 102 | News   | Fiction    |      15 |      21 |
| 103 | Hello  | Nonfiction |      21 |      32 |
| 104 | Poet   | Nonfiction |      35 |      13 |
| 105 | Dunces | Fiction    |       5 |      35 |
| 106 | One    | Fiction    |      28 |      14 |
| 107 | From   | NULL       |      46 |      31 |
+-----+--------+------------+---------+---------+
7 rows in set (0.00 sec)

mysql> SELECT Name, Category, InStock, OnOrder
    -> FROM Books
    -> WHERE Category='Fiction' XOR InStock IS NULL
    -> ORDER BY Name;
+--------+----------+---------+---------+
| Name   | Category | InStock | OnOrder |
+--------+----------+---------+---------+
| Dunces | Fiction  |       5 |      35 |
| News   | Fiction  |      15 |      21 |
| One    | Fiction  |      28 |      14 |
+--------+----------+---------+---------+
3 rows in set (0.00 sec)


*/
Drop table Books;

CREATE TABLE Books
(
   ID SMALLINT NOT NULL PRIMARY KEY,
   Name VARCHAR(40NOT NULL,
   Category VARCHAR(15),
   InStock SMALLINT NOT NULL,
   OnOrder SMALLINT NOT NULL
);


INSERT INTO Books
VALUES (101'On', 'Nonfiction', 1311),
       (102'News', 'Fiction', 1521),
       (103'Hello', 'Nonfiction', 2132),
       (104'Poet', 'Nonfiction', 3513),
       (105'Dunces', 'Fiction', 535),
       (106'One', 'Fiction', 2814),
       (107'From', NULL, 4631);


select from Books;

SELECT Name, Category, InStock, OnOrder
FROM Books
WHERE Category='Fiction' XOR InStock IS NULL
ORDER BY Name;


           
       
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