根据成员的建议和以前的帖子，我正在对Interspire购物车数据库中的多个表进行查询，如下所示：

SELECT c.customerid, c.custconfirstname, c.custconemail, o.ordstatus, o.orddate, GROUP_CONCAT(  'Order Id: ', orderid,  ' | Product name: ', ordprodname,  ' | Quantity: ', ordprodqty,  '<br>' ) AS ordered_items
FROM isc_customers c
LEFT OUTER JOIN isc_orders o ON o.ordcustid = c.customerid
LEFT OUTER JOIN isc_order_products op ON op.orderorderid = o.orderid
LEFT OUTER JOIN isc_product_images pi ON pi.imageprodid = op.orderprodid
GROUP BY c.customerid
HAVING COUNT( DISTINCT o.ordcustid ) >0
AND o.ordstatus = 0
AND o.orddate < UNIX_TIMESTAMP( ) -  '18000'
AND o.orddate > UNIX_TIMESTAMP( ) -  '259200'

我在phpmyadmin中得到的结果如下所示：

customerid  custconfirstname    custconemail        ordstatus   orddate     ordered_items
6532        Cust1               CUST1@EXAMPLE.COM   0           1337502962  [BLOB - 498B]
5522        Cust2               CUST2@EXAMPLE.COM   0           1337670453  [BLOB - 284B]
4321        Cust3               CUST3@EXAMPLE.COM   0           1337507476  [BLOB - 521B]
1235        Cust4               CUST4@EXAMPLE.COM   0           1337577095  [BLOB - 1.0  KiB]
9560        Cust5               CUST5@EXAMPLE.COM   0           1337518452  [BLOB - 1.0  KiB]

当我尝试在php页面中回显结果以对其进行测试时，什么也没有返回。我只是想知道Blob的含义以及如何使用它。显然其中有一些数据，我只是不知道如何访问或使用它。