grep -nr 'archermind' -r, --recursive Read all files under each directory, recursively, following symbolic links only if they are on the command line. This is equivalent to the -d recurse option. -n, --line-number Prefix each line of output with the
在数据库时候我设计了学生的分数为nvarchar(50),是为了在从TXT文件中读取数据插入到数据库表时候方便,但是在后期由于涉及到统计问题,比如求平均值等,需要int类型才可以,方法是:Convert(int,字段名).例如:select avg(Convert(int,M_Score)) from temp 建立视图,将视图当表示用 CREATE VIEW temp AS select StudentId, MAX(StudentScore) as M_Score from T_Studen