What is the reason for the failure of the node database connection?

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Node-mysql nodejs-express node.js
Mar.14,2021
The reason for the

error is that the connection cannot be established.

  • Note that your IP address is local and check to see if mysql is installed locally.
  • if installed, check to see if it is started
  • if started, check whether the port can connect telnet localhost 3306 or netstat-ano see if 3306 is listening
  • try restarting if you can connect
The

telnet localhost 3306 command branch is not available.

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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-64f5-42977a5-5844.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-42977a5-5844.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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