i am trying to replace table in sql query dynamically in adf pipeline. tried below queries to get it

select * from c where 
timestampToDateTime("@{concat(variables('lastUpdatedColumn'),'*1000')}") < 
"@{formatDateTime(utcnow(),'yyyy-MM-ddTHH:mm:ss.fffffffZ')}"

select * from c where TimestampToDateTime(variables('lastUpdatedColumn')*1000) < 
"@{formatDateTime(utcnow(),'yyyy-MM-ddTHH:mm:ss.fffffffZ')}"
 

but both queries are giving same output as below

 "select * from c where TimestampToDateTime("c._ts*1000") < "2024-07- 
  24T13:03:24.6140044Z"",

it is being replaced with “c._ts*1000” . but i want to remove those slashes(,/). how could we remove those . thanks in advance