Conversions between Varbinary and Char/Varchar in MySQL
Converting a varbinary field to a char or varchar type is crucial in situations where data is required for different purposes.
From Varbinary to Varchar
To convert from varbinary to varchar, MySQL offers the CAST or CONVERT functions:
<code class="sql">CAST(foo AS CHAR(100)) CONVERT(foo, CHAR(100))</code>
However, note that direct casting to varchar is not possible. There is a reported MySQL bug that prevents this conversion.
Supported Types for Conversion
The CAST and CONVERT functions support the following types for conversion:
Source Type | Destination Type |
---|---|
BINARY[(N)] | CHAR[(N)] |
CHAR[(N)] | DATE |
DATE | DATETIME |
DECIMAL[(M[,D])] | SIGNED [INTEGER] |
SIGNED [INTEGER] | TIME |
UNSIGNED [INTEGER] | None (not supported) |
Overcoming the Varchar Casting Issue
Since direct casting to varchar is not supported, a workaround is available:
<code class="sql">SELECT CONCAT(CAST(foo AS CHAR(100)), '') AS varchar_converted</code>
This workaround effectively appends an empty string to the converted char value, resulting in a varchar value.
The above is the detailed content of Here are a few title options, focusing on the question format and the article\'s core theme: **Option 1 (Direct and concise):** * How do I Convert varbinary to varchar in MySQL? **Option 2 (Highli. For more information, please follow other related articles on the PHP Chinese website!