Are dependent attributes equivalent to global variables?

is the attribute marked with the [Dependency] attribute of Unity, which feels like a global variable.
it is said on the Internet that it is equivalent to a static attribute, isn"t it?

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-64f5-1c22b00-32e55.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1c22b00-32e55.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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