Cut is a q operator that cuts a list or table into subarrays. cut is a q keyword that cuts a list or table into a matrix into a specified number of columns.

2018年4月12日 · Use _ to cut the string. or. For the following list: q)a: ("ua@1100@1";"sba@2220@2";"r@4444@a") I want following output : …

2017年9月1日 · First removed the start and end tags. leaving me with rows like. Then, splitting the string. gives me a list where the odd entries are my times. I just can't figure out how to take …

Is there a way to remove the "." and everything before it? You can use 0: for this - it's often the best approach for lists of strings, and works particularly well for longer lists compared to using …

2011年5月13日 · We can also split a list into lists of varying length by passing a list of indexes as the left argument to the _ (cut) operator: To split a list of some type other than char using a …

kdb+/q号称是世界上最快的内存数据库，它使用统一的数据库处理实时数据和历史数据，同时具备CEP (复杂事件处理)引擎、内存数据库、磁盘数据库等功能。 与一般数据库或大数据平台相 …

Studio for kdb+ is a rapid development environment for the ultra-fast database kdb+ from Kx Systems. In the style of commonly used SQL Clients, it allows you to. The editor component is …

2016年6月14日 · kdb是Linux系统的内核调试器，由SGI公司开发，遵循GPL许可证的开源代码调试工具。kdb主要用于调试Linux内核空间的程序代码，例如设备驱动程序的调试、内核模块的 …

Studio for kdb+ is a rapid development environment for the ultra-fast database kdb+ from Kx Systems. In the style of commonly used SQL Clients, it allows you to. The editor component is …

2017年7月18日 · I've looked into the underscore for drop/cut, but this only seems to remove the first or last n entries, not characters. Any ideas? Depends on what you're using drop cut on. …