Here you go:
select REPLACE(REPLACE(REPLACE('2017-10-10 23:59:21.087', '-', ''), ':', ''), ' ', '')
If it’s a field in a table, just do this:
SELECT REPLACE(REPLACE(REPLACE(forex_lastupdate, '-', ''), ':', ''), ' ', '')
FROM noksek_tickdata_copy;
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solved MYSQL how to convert varchar to bigint