Category: SQL
-
For Better understanding on Spark SQL windows Function and Best Usecases do refer our post Window functions in Oracle Pl/Sql and Hive explained and compared…
-
Here’s an enhanced Spark SQL cheatsheet with additional details, covering join types, union types, and set operations like EXCEPT and INTERSECT, along with options for…
-
Here’s a categorized Spark SQL function reference, which organizes common Spark SQL functions by functionality. This can help with selecting the right function based on…
-
CRUD stands for Create, Read, Update, and Delete. It’s a set of basic operations that are essential for managing data in a database or any…
-
Here’s a breakdown of the main SQL command categories and their purposes, including examples of commands commonly used within each: 1. Data Definition Language (DDL)…
-
Partitioning in SQL, HiveQL, and Spark SQL is a technique used to divide large tables into smaller, more manageable pieces or partitions. These partitions are…
-
PIVOT Clause in Spark sql or Mysql or Oracle Pl sql or Hive QL The PIVOT clause is a powerful tool in SQL that allows…
-
SQL query flows through the Oracle engine in the following steps: Step 1: Parsing Step 2: Optimization Step 3: Row Source Generation Step 4: Execution…
-
Let’s list all possible places where subqueries in MySQL or Hive QL or Pyspark SQL Query can be used: 1. In the SELECT Clause Subqueries…
-
Spark SQL supports several types of joins, each suited to different use cases. Below is a detailed explanation of each join type, including syntax examples…
-
Temporary functions allow users to define functions that are session-specific and used to encapsulate reusable logic within a database session. While both PL/SQL and Spark…
-
Window functions, also known as analytic functions, perform calculations across a set of table rows that are somehow related to the current row. This is…
-
Common Table Expressions (CTEs) are a useful feature in SQL for simplifying complex queries and improving readability. Both Oracle PL/SQL and Apache Hive support CTEs,…
-
Function Name Description Example Usage Result CONCAT Concatenates two strings. SELECT CONCAT(‘Oracle’, ‘PL/SQL’) FROM dual; OraclePL/SQL ` ` (Concatenation) Concatenates two strings. LENGTH Returns the…
-
Date and Time manipulation in Oracle SQL In Oracle SQL, date and time manipulation is essential for many database operations, ranging from basic date arithmetic…
-
What is database structure? A database structure is the blueprint that defines how data is arranged ,organized, stored, accessed, and managed within a database. It’s…
-
SQL (Structured Query Language) supports various data types to represent different kinds of data. These data types define the format and constraints of the data…
-
In this BlogPost we would like to define Most Basic Terms in SQL:- What is SQL, Data Database, DBMS , RDBMS. What is SQL? SQL…
-
Indexing in SQL is a technique used to improve the performance of queries by creating special data structures (indexes) that allow for faster data retrieval.…
-
LIKE Operator: The LIKE operator is used to search for a specified pattern in a column. It allows the use of wildcards: % (percent sign):…