位置: sqlserver高级教程 - 标签
SQL Server SQL高级查询语句小结(sqlserver高级教程)
简述:Ø基本常用查询--selectselect*fromstudent;--all查询所有selectallsexfromstudent;--distinct过滤重复selectdistinctsexfromstudent;--count统计selectcount(*)fromstudent;selectcount(sex)f
发布时间:2024/02/26