SQL - ROWS vs RANGE Frame Specification
• ROWS defines window frames by physical row positions, while RANGE groups logically equivalent rows based on value proximity within the ORDER BY column
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R - Create Data Frame with Examples
The data.frame() function constructs a data frame from vectors. Each vector becomes a column, and all vectors must have equal length.
R - Add/Remove Columns in Data Frame
• Data frames in R support multiple methods for adding columns: direct assignment ($), bracket notation ([]), and functions like cbind() and mutate() from dplyr
R - Add/Remove Rows in Data Frame
The most straightforward approach uses rbind() to bind rows together. Create a new row as a data frame or list with matching column names: