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Are Dataframes in PySpark Lazy evaluated?
BDL Ecosystem-HDFS and Hive Tables
HDFS: Hadoop Distributed File System – Complete Guide ✅ Why HDFS? 🔑 Common Terminology Term Description NameNode Master node, manages metadata (namespace, file locations) DataNode Worker node, stores actual data blocks Block Unit of storage in HDFS (default 128 MB) Replication Factor Number of block copies (default: 3) Rack Awareness Data placement strategy across different…
Big Data, Data Warehouse, Data Lakes, Big Data Lake, LakeHouse, Snowflake – Explain in simple words
💡 What is Teradata? Teradata is a massively parallel processing (MPP), enterprise-grade relational database management system (RDBMS) designed specifically for data warehousing and large-scale analytics. 🏗️ Core Purpose Teradata is built to store and analyze massive volumes of structured data efficiently. It helps large organizations—especially banks, telecoms, and retailers—run: 🔧 Key Features of Teradata Feature…
Window functions in Oracle Pl/Sql and Hive explained and compared with examples
Common Table Expressions (CTEs) in Oracle Pl/Sql / Hive / Spark SQL explained and Compared
String/Character Manipulation functions in Oracle PL/SQL, Apache Hive
Date and Time manipulation in Oracle SQL, Apache Hive QL, Mysql
Python input function in Detail- interesting usecases
Python Strings Interview Questions
SAS Date Functions:- DATEPART( ), TIMEPART( ), Hour(), Minute(), Second() Part1