Updates all rows with an InStock value of less than 30 : Update « Insert Delete Update « SQL / MySQL






  1. SQL / MySQL
  2. Insert Delete Update
  3. Update

Updates all rows with an InStock value of less than 30

     
mysql>
mysql>
mysql> CREATE TABLE Books
    -> (
    ->     BookID SMALLINT NOT NULL PRIMARY KEY,
    ->     BookName VARCHAR(40) NOT NULL,
    ->     InStock SMALLINT NOT NULL
    -> )
    -> ENGINE=INNODB;
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql>
mysql> INSERT INTO Books
    -> VALUES (101, 'C: Writing on Writing', 12),
    -> (102, 'Oracle', 17),
    -> (103, 'Opera', 23),
    -> (104, 'Notebook', 32),
    -> (105, 'Pascal', 6),
    -> (106, 'One Hundred Years of Solitude', 28);
Query OK, 6 rows affected (0.00 sec)
Records: 6  Duplicates: 0  Warnings: 0

mysql>
mysql> UPDATE LOW_PRIORITY Books
    -> SET InStock=InStock+10
    -> WHERE InStock<30;
Query OK, 5 rows affected (0.00 sec)
Rows matched: 5  Changed: 5  Warnings: 0

mysql>
mysql> drop table Books;
Query OK, 0 rows affected (0.00 sec)








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