docs/en/sql-reference/sql-functions/binary-functions/from_binary.md
Converts a binary value to a VARCHAR string based on the specified binary format (binary_type). The following binary formats are supported: hex, encode64, and utf8. If no binary_type is specified, hex is the default.
from_binary(binary[, binary_type])
binary: the input binary to convert, required.
binary_type: the binary format for conversion, optional.
hex (default): from_binary uses the hex method to encode the input binary to a VARCHAR string.encode64: from_binary uses the base64 method to encode the input binary to a VARCHAR string.utf8: from_binary converts the input binary to a VARCHAR string without any transformation.Returns a VARCHAR string.
mysql> select from_binary(to_binary('ABAB', 'hex'), 'hex');
+----------------------------------------------+
| from_binary(to_binary('ABAB', 'hex'), 'hex') |
+----------------------------------------------+
| ABAB |
+----------------------------------------------+
1 row in set (0.02 sec)
mysql> select from_base64(from_binary(to_binary('U1RBUlJPQ0tT', 'encode64'), 'encode64'));
+-----------------------------------------------------------------------------+
| from_base64(from_binary(to_binary('U1RBUlJPQ0tT', 'encode64'), 'encode64')) |
+-----------------------------------------------------------------------------+
| STARROCKS |
+-----------------------------------------------------------------------------+
1 row in set (0.01 sec)
mysql> select from_binary(to_binary('STARROCKS', 'utf8'), 'utf8');
+-----------------------------------------------------+
| from_binary(to_binary('STARROCKS', 'utf8'), 'utf8') |
+-----------------------------------------------------+
| STARROCKS |
+-----------------------------------------------------+
1 row in set (0.01 sec)