How does Mongodb get the current timestamp

how to effectively get the current timestamp

Php mongodb
Sep.19,2021 
ISODate().valueOf();

result: 

1540530928417
The client of

mongodb is the js, timestamp new Date (). GetTime () . There is no difference

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3b545-2c27f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3b545-2c27f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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