sqlhexbin               Hexagonal binning
sqlmodelmatrix          Create model matrix in a SQL table
sqlocpoly               Smoothing
sqlsubst                Substitute variables into a text string
sqlsurvey               Survey design based on SQL database
sqlvar                  Horvitz-Thompson estimator for multistage
                        sampling
svylm                   Linear regression models
svymean.sqlsurvey       Means and totals
svyquantile.sqlsurvey   Probability-weighted quantiles
