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SQL Queries from R | Finance Train

R Programming for Data Science

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Relational Operators in R

Logical Operators in R

Conditional Statements in R

For Loop in R Programming

While and Repeat Loop in R Programming

Functions in R Programming

Creating Functions in R

Apply Functions in R

Importing Data from External Data Sources in R

Importing Data Using read.csv in R

Import Data using read.table in R

Importing Data Using data.table – fread in R

Importing Data from Excel in R

Using XLConnect in R Programming

Importing Data from a Database in R

SQL Queries from R

Importing Data from Web in R

SQL Queries from R

In the previous lesson we learned that we can use the dbReadTable() function to import a table into R. However, this can be complicated if our table contains millions of records and we are actually interested only in a sub-set of records that meet a certain condition. In such a scenario, we have two choices:

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