Tag: big_data_interview
Computing the number of characters in a given string column using PySpark: length
PySpark’s length function computes the number of characters in a given string column. It is pivotal in various data transformations…
Returning the smallest value from a set of columns in PySpark – least
pyspark.sql.functions.least The least function in PySpark returns the smallest value from a set of columns. It is often used in…
Computing the kurtosis value of a numeric column in a DataFrame in PySpark-kurtosis
The kurtosis function in PySpark aids in computing the kurtosis value of a numeric column in a DataFrame. Kurtosis gauges…
Identifying null values within a DataFrame in PySpark
PySpark’s isnull function serves the vital role of identifying null values within a DataFrame. This function simplifies the process of…
Handling missing numeric data in PySpark – isnan – Example included
pyspark.sql.functions.isnan In PySpark, the isnan function is primarily used to identify whether a given value in a DataFrame is NaN…
PySpark’s instr Function: Substring searches in Big Data
pyspark.sql.functions.instr The instr function in PySpark’s DataFrame API helps in determining the position of the first occurrence of a substring…
PySpark’s map_values Function : Extract the values from a map column.
In PySpark’s realm, the map_values function is employed to extract the values from a map column. Drawing a parallel to…
PySpark’s map_keys function : Function used to retrieve the keys of a map column.
PySpark provides, map_keys stands out when it comes to handling maps (dictionary-like structures in PySpark). In this article, we will…
Harnessing the power of PySpark’s grouping function : Understanding grouping indicators in PySpark
pyspark.sql.functions.grouping This function shines a light on the intricacies of groupings in aggregate operations, indicating whether a specified column in…
Column-wise comparisons in PySpark using the greatest function: Getting the maximum value with PySpark’s greatest function
pyspark.sql.functions.greatest In the vast universe of PySpark’s functionalities, there exists a function that often becomes the unsung hero when dealing…
