Fading Coder

Introduction A common data transformation requirement involves converting row values into column headers. For instance, consider a sales dataset containing seller names, transaction dates, and amounts. The goal might be to aggregate monthly sales figures while displaying each month as a separate co...

Using explode for Column-to-Row Transformation To convert a delimited string column into multiple rows: SELECT other_cols, exploded_col FROM source_table LATERAL VIEW explode(split(target_column, ',')) tmp AS exploded_col; The split() function breaks the string into an array, explode() turns each ar...