DECODE(, ) : DECODE « Function « SQL / MySQL

1. SQL / MySQL
2. Function
3. DECODE

DECODE(, )

   
mysql>
mysql> CREATE TABLE UserAccounts
    -> (
    ->     UserID SMALLINT NOT NULL PRIMARY KEY,
    ->     Password VARCHAR(20) NOT NULL
    -> );
Query OK, 0 rows affected (0.00 sec)

mysql> INSERT INTO UserAccounts VALUES
    -> (101, ENCODE('pw101', 'key101'));
Query OK, 1 row affected (0.00 sec)

mysql>
mysql> SELECT * FROM Users;
mysql>
mysql> SELECT UserID, DECODE(Password, 'key101') AS Password
    -> FROM UserAccounts;
+--------+----------+
| UserID | Password |
+--------+----------+
|    101 | pw101    |
+--------+----------+
1 row in set (0.00 sec)

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

mysql>

   
    
    
  

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