sign<c("S5E14A31","S5E15A31","S5E16A31","S5E17A31","S5E18A31","S5E19A31","S5E20A31","S5E21A31","S5E13A31","S5E116A31","S5E115A31","S5E114A31","S5E113A31","S5E112A31","S5E111A31","S5E110A31","S5E109A31","S5E123A31");
wenjian<-c("data201702","data201701","data201612","data201611","data201610","data201609");
channel<-odbcConnect("mysql_data",uid="gdc",pwd="5111");
m=1
da<-sqlQuery(channel,paste("SELECT * FROM wenjian[m] WHERE tag_no=sign[x-9] OR tag_no=sign[x]"))
在这里，我必须使用wenjian[m]，因为需要涉及循环的问题，但是字符串的读取结果总是会带“”这个导致了SELECT * FROM wenjian[m] WHERE tag_no=sign[x-9] OR tag_no=sign[x]在数据库中没办法读取，怎么办呢？求帮助？怎么去掉“”？？