rquery (version 0.2.0)

select_rows_nse: Make a select rows node.

Description

Make a select rows node.

Usage

select_rows_nse(source, expr, env = parent.frame())

Arguments

source

source to select from.

expr

expression to select rows.

env

environment to look for values in.

Value

select columns node.

Examples

# NOT RUN {
my_db <- DBI::dbConnect(RSQLite::SQLite(), ":memory:")
d <- dbi_copy_to(my_db, 'd',
                data.frame(AUC = 0.6, R2 = 0.2, z = 3))
eqn <- select_rows_nse(d, AUC >= 0.5) %.>%
   select_columns(., "R2")
cat(format(eqn))
sql <- to_sql(eqn, my_db)
cat(sql)
DBI::dbGetQuery(my_db, sql)
DBI::dbDisconnect(my_db)

# }