Raymond Nijland questions

Raymond Nijland answers

• delete all duplicate rows in mySQL 5.7.9
• Syntax error: WITH is not valid input in this position
• MariaDb SQL Injection
• How MySQL does the math calculation of floating point addition?
• Best MySQL data type to store MD5 hash or NULL
• How to improve INSERT performance on a very large MySQL table
• How to check if a value is a number in SQLite
• How to prevent PHP sessions being shared between different apache vhosts?
• FPDF error: Some data has already been output, can't send PDF file on 000webhost
• How to convert MySQL JSON array to comma separated string