Selecting data frame rows based on partial string match in a column

Question

I want to select rows from a data frame based on partial match of a string in a column, e.g. column \'x\' contains the string "hsa". Using sqldf -

Answer 1

LIKE should work in sqlite:

require(sqldf)
df <- data.frame(name = c('bob','robert','peter'),id=c(1,2,3))
sqldf("select * from df where name LIKE '%er%'")
    name id
1 robert  2
2  peter  3