How get size of blob in PHP or SQL [closed]

问题

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Closed 6 years ago.

I have lots of blob data in my database, and I need to retrieve the weight (400kb, 14,2kb etc.) for each.

How can I do that?

回答1:

In SQL:

SELECT some_key, LENGTH(blob_column) AS size_in_bytes FROM the_table

In PHP:

$sizes = array();
foreach (how_you_query_the_db('SELECT some_key, blob_column FROM the_table ') as $row)
  $sizes[$row['some_key']] = strlen($row['blob_column']);

来源：https://stackoverflow.com/questions/14122700/how-get-size-of-blob-in-php-or-sql