wildplasser questions

wildplasser answers

• Detect when a fifo is opened from a program
• Postgresql View - Performance with fewer columns
• Parenthesis for JOIN clause
• SQL self-join compare current record with the record of the previous date
• postgresql left join multiple conditions
• Memcpy takes the same time as memset
• choose minimum date from a record out of multiple columns
• How to remove reverse duplicates from a SQL query
• Delete query on a very large table running extremely slowly SQL
• Why does using the "AND" operator works with a JOIN, even without a "WHERE" clause