terrylynch questions

terrylynch answers

• KDB: select first n rows from each group
• KDB+/Q: About unused parameters in inner functions
• KDB select only rows with max value on a column elegantly
• KDB+/q: How to implement an aggregation table for features?
• KDB/Q: how to loop without loops?
• (q/kdb+) Split string column into float columns
• Getting aggregate functions to return null in KDB