原理：正则表达式[^0-9.]匹配并删除所有非数字字符，比手动删除符号快10倍。CAST确保结果为数值类型，可直接计算。

UK Board Class 12 Computer Science Syllabus 2025-26 has been released on the official website. Students can check this ...

Choose a SQL Server trial, edition, tool, or connector that best meets your data and workload needs. Get the full-featured free edition, licensed for use as a development and test database in a ...