update backupfile set url=REPLACE(url,'http://www.maidq.com','http://maidq.com')
update backupfile set logical_name=REPLACE(logical_name,logical_name,'tmp'+logical_name+' end ') where file_number=1
update backupfile set logical_name=REPLACE(logical_name,logical_name,SUBSTRING(logical_name,3,len(logical_name)-2)) where file_number=1
update backupfile set logical_name=REPLACE(logical_name,logical_name,SUBSTRING(logical_name,1,len(logical_name)-4)) where file_number=2
SELECT REPLACE(替换字段,'原内容','新内容') from 表名; update 表名 set 替换字段=(REPLACE(替换字段,'原内容','新内容'))
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