StructType & StructField | Create DataFrame | Nested Schema|Spark Interview question| Spark tutorial
We are making a complete collection of 2019 Spark interview questions and Apache Spark tutorial.This video is an addition to the collection. In this video we talk about Apache Spark StructType and StructField.
StructType is a built in data type and useful for creating customzed schema,nested schema and eliminaring order dependencies in dataframe transformation.
Struct is the field in StructType with parameters
Name
Data Type
Nullable flag
Metadata.
In this video we talk about below points:
StructType
StructField
Add structfields to StructType
a) by passing seq of StructField and b) using various add methods, c) From existing StructType
Compare two schemas
Create dataframe with own customized schema
Create nested schema
Flatten nested schema.
toDF() vs createDataFrame() : • Spark Interview Questions and Answers...
About channel
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We are trying to make video series on technical interview questions on various skills for experienced and freshers. This is based on the industry experience. We are trying to compile all the
possible questions with answers and give you the core concepts of the topic.
We will present a series on tutorial on various skill sets as well. Our first tutorial will be on Apache Spark and we will present it soon.
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