HEX
Returns the hexadecimal representation of numeric, string, or binary data.
Syntax
HEX (expression)
Arguments
expression: any valid expression. This can be a column name, literal, or the return value of another function.
Return Type
Upper-case hexadecimal string.
Examples
SELECT HEX(1234); **** +-----------+ | HEX(1234) | +-----------+ | 4D2 | +-----------+
SELECT HEX('1234');
****
+-------------+
| HEX('1234') |
+-------------+
| 31323334 |
+-------------+SELECT HEX('ohai');
****
+-------------+
| HEX('ohai') |
+-------------+
| 6F686169 |
+-------------+Note
This function operates on the binary representation of the given argument. That is why the result of hex(1234) and hex('1234') yield different values. This also means that the output of hex( number ) cannot be fed into UNHEX directly to get back the literal number 1234.