DB ERROR

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Mysql_Query : select count(uid) as total,goods_brand from morning_goods_table where goods_class = '0' and approval_date > '0' and ( substring(goods_category,1,6) = '090604' or substring(goods_mcategory1,1,6) = '090604' or substring(goods_mcategory2,1,6) = '090604' or substring(goods_mcategory3,1,6) = '090604' or substring(goods_mcategory4,1,6) = '090604' or substring(goods_mcategory5,1,6) = '090604' ) and goods_grant <= 0 group by goods_brand
Mysql_Error : MySQL server has gone away
Mysql Error Num : 2006
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