string(expr) – Casts the value `expr` to the target data type `string`. Platforms: WhereOS, Spark,

stddev_pop(expr) – Returns the population standard deviation calculated from values of a group. Platforms: WhereOS,

stddev_samp(expr) – Returns the sample standard deviation calculated from values of a group. Platforms: WhereOS,

str_to_map(text[, pairDelim[, keyValueDelim]]) – Creates a map after splitting the text into key/value pairs using

sst(double|array x [, const string options]) – Returns change-point scores and decisions using Singular Spectrum

stack(n, expr1, …, exprk) – Separates `expr1`, …, `exprk` into `n` rows. Platforms: WhereOS, Spark,