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我在Oracle数据库中有一列，其中存储了连接的值。例如，从列值中删除额外空间
/uk/letters/default?/uk/letters/funny_letters?
/uk/letters/letters?/library/conditionalstyle?o=3&f=11/uk/letters/funny_letters?
/uk/workinglife/viewarticle_93?/library/conditionalstyle?/uk/financialcentre/car_tax_calculator?
/uk/job-hunting/default?/partners/msn/i-resignfinctr?/uk/letters/letters?/
在这两个网址之间，有一些间隔。我怎样才能删除它们？