mysqlsamples

mysql> SELECT SUBSTRING(DATABASE(),1,1);
+---------------------------+
| SUBSTRING(DATABASE(),1,1) |
+---------------------------+
| j                         |
+---------------------------+
1 ROW IN SET (0.00 sec)

mysql> SELECT ascii(SUBSTRING(DATABASE(),1,1));
+----------------------------------+
| ascii(SUBSTRING(DATABASE(),1,1)) |
+----------------------------------+
|                              106 |
+----------------------------------+
1 ROW IN SET (0.00 sec)

mysql> SELECT ascii(SUBSTRING(DATABASE(),2,1));
+----------------------------------+
| ascii(SUBSTRING(DATABASE(),2,1)) |
+----------------------------------+
|                              111 |
+----------------------------------+
1 ROW IN SET (0.00 sec)

mysql> SELECT IF(DATABASE()="joomla","si","no");
+-----------------------------------+
| IF(DATABASE()="joomla","si","no") |
+-----------------------------------+
| si                                |
+-----------------------------------+
1 ROW IN SET (0.00 sec)

mysql> SELECT IF(ascii(SUBSTRING(DATABASE(),1,1))=106,sleep(10),NULL);
+---------------------------------------------------------+
| IF(ascii(SUBSTRING(DATABASE(),1,1))=106,sleep(10),NULL) |
+---------------------------------------------------------+
|                                                       0 |
+---------------------------------------------------------+
1 ROW IN SET (10.00 sec)