Dear R-helpers,

I have a huge dataset and I create a filter selecting only the cases I want
using:
>data <- subset(data, data$var=='x' | data$var=='y' | data$var=='z' | ... )

The problem is, when i check my new data it doen't show a row_names column
but when the data is exported to MYSQL (using RMYSQL) it creates a column
row_names.

I've already tried
>row.names(data)<- NULL
tried
>write.table
then
>read.table

tried
>as.matrix(data)

but the row_names column does not appear in R, but appears everytime I
export to MYSQL

I've done a similar work with another dataset but the difference was that in
the filter I used
>data <- subset(data, substr(as.numeric(data$var),1,2==0 |
substr(as.numeric(data$var),1,2==1 |  ... )

I don't know how to get rid of that column.

thanks

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