Nick questions

Nick answers

• Database "is being accessed by other users" error when using ThreadPoolExecutor with Django
• camelCase column in postgresql database in rails (ActiveRecord)
• Sum the “previous row” value with existing row value in a SELECT statement
• Slow on first query
• Postgres: Set fillfactor to 50?
• How to create a multi-column recommendation engine in postgresql?
• postgres query between yesterday at time and today at time
• How to implement full text search on complex nested JSONB in Postgresql
• Set empty array as default value in array_agg in postgresql
• urlencode with only built-in functions