These extension functions are written by Liam Healy and made available through the SQLite website (http://www.sqlite.org/contrib).
initExtension(db)
acos, acosh, asin, asinh, atan, atan2, atanh, atn2, ceil, cos, cosh, cot, coth, degrees, difference, exp, floor, log, log10, pi, power, radians, sign, sin, sinh, sqrt, square, tan, tanh
charindex, leftstr, ltrim, padc, padl, padr, proper, replace, replicate, reverse, rightstr, rtrim, strfilter, trim
stdev, variance, mode, median, lower_quartile, upper_quartile
# NOT RUN {
library(DBI)
db <- RSQLite::datasetsDb()
RSQLite::initExtension(db)
dbGetQuery(db, "SELECT stdev(mpg) FROM mtcars")
sd(mtcars$mpg)
dbDisconnect(db)
# }
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