Database Reference
In-Depth Information
mysql>
SELECT 'Install MySQL in C:\\mysql on Windows';
+--------------------------------------+
| Install MySQL in C:\mysql on Windows |
+--------------------------------------+
| Install MySQL in C:\mysql on Windows |
+--------------------------------------+
Backslash causes a temporary escape from normal string processing rules, so se‐
quences such as
\'
,
\"
, and
\\
are called escape sequences. Others recognized by
MySQL are
\b
(backspace),
\n
(newline, also called linefeed),
\r
(carriage return),
\t
(tab), and
\0
(ASCII NUL).
• Write the string as a hex value:
mysql>
SELECT 0x49276D2061736C656570;
+------------------------+
| 0x49276D2061736C656570 |
+------------------------+
| I'm asleep |
+------------------------+
See Also
If you execute SQL statements from within a program, you can refer to strings or binary
values symbolically and let your programming interface take care of quoting: use the
placeholder mechanism provided by the language's database-access API (see
Recipe 2.5
). Alternatively, load binary values such as images from files using the
LOAD_FILE()
function (see
Recipe 19.6
).
5.5. Checking or Changing a String's Character Set or
Collation
Problem
You want to know the character set or collation of a string, or change a string to some
other character set or collation.
Solution
To check a string's character set or collation, use the
CHARSET()
or
COLLATION()
func‐
tion. To change its character set, use the
CONVERT()
function. To change its collation,
use the
COLLATE
operator.
