How does v-show control the display through global variables, and how to write the following expression global variables?

how does v-show control the display through global variables, and how does the following expression global variables write

Mar.23,2021

Please describe the problem clearly and paste the code.

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-64f5-1b3bb30-2c2c1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3bb30-2c2c1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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