dm_nrow: Number of rows
In dm: Relational Data Models

View source: R/filter-helpers.R

dm_nrow

R Documentation

Number of rows

Description

Returns a named vector with the number of rows for each table.

Usage

dm_nrow(dm)

Arguments

`dm`	A `dm` object.

Value

A named vector with the number of rows for each table.

Examples


dm_nycflights13() %>%
  dm_filter(airports = (faa %in% c("EWR", "LGA"))) %>%
  dm_nrow()

dm documentation built on May 29, 2024, 11:41 a.m.

dm index

Package overview README.md Class dm and basic operations Copy tables to and from a database Create a dm object from a database Create a dm object from data frames Filtering in relational data models Function naming logic Getting started with dm Insert, update, or remove rows in a database Introduction to relational data models Joining in relational data models Manipulating individual tables Migration guide: 'cdm' -> 'dm Model verification - keys, constraints and normalization Visualizing dm objects Zooming and manipulating tables

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