DB ERROR

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Mysql_Query : select * from morning_goods_table where goods_class = '0' and approval_date > '0' and substring(goods_category,1,0) = '' and ( ( goods_name like '%니트%' ) or ( goods_advance like '%니트%' ) or ( goods_keyword like '%니트%' ) or ( goods_brand like '%니트%' ) or ( goods_company like '%니트%' ) ) and goods_grant <= 0 order by goods_rank asc limit -50, 50
Mysql_Error :
Mysql Error Num :

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