How can you query a BLOB field in MySQL?

In MySQL, you can use the SELECT statement to query BLOB fields. Here is an example query statement:

SELECT blob_column FROM your_table;

In which, blob_column is the column name for the BLOB field, and your_table is the name of the table to query.

If you want to filter query results using conditions, you can use the WHERE clause. For example, to retrieve the BLOB field of the record with the id of 1:

SELECT blob_column FROM your_table WHERE id = 1;

Please replace blob_column, your_table, and the conditions based on your actual situation.