查询sqlserver所有的数据库select * from sysdatabases;查询sqlserver数据库下有哪些表和视图SELECT name FROM SysObjects where xtype='U' or xtype='V' ORDER BY Name;--所有表的话是U视图下的表的话是V查询sqlserver表有哪些字段，字段类型select name from syscol

多变量分析(终图)最后探究贷款利率与信用评分和评级之间的关系：data$CreditGrade <- factor(data$CreditGrade,order=TRUE,levels = c("AA","A","B","C","D","E","HR"))data$ProsperRating..Alpha. <- facto...