MySQL compressed package configuration commands about the solution of "-"

one step of the installation-free version is 

mysqld -install

someone will use 

mysqld install

some people will use

. 
mysqld --install

I don"t know what the difference is and why they all succeed.

Mysql--configuration mysql
Mar.22,2021

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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-64f5-1e44797-44aba.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e44797-44aba.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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