ggiroux questions

ggiroux answers

• ON DUPLICATE KEY UPDATE for Specific Key in Multi-Key Table
• Schedule cron entries to run script only when not already running
• MYSQL nested loop stored procedure issue
• How can I sum values in column based on the value in another column?
• Ordering and limit
• mysql transaction deadlock
• Stable/repeatable random sort (MySQL, Rails)
• Use "nohup" to run "top" command in background [closed]
• In Bash, how can option flag values be stored in variables? [duplicate]
• Is it safe to kill a replicating MySQL-process which is 'copying to tmp table'?