1️⃣ Variables: Containers for storing data values, like integers, strings, and lists.
2️⃣ Data Types: Includes types like int, float, str, list, tuple, dict, and set to represent different forms of data.
Skills required to become a Data Analyst 👇
- Advanced Excel: Proficiency in Excel is crucial for data manipulation, analysis, and creating dashboards.- SQL/Oracle: SQL is essential for querying databases to extract…
### DATE AND TIME FUNCTIONS:- NOW(): Returns the current date and time.- CURDATE(): Returns the current date.- CURTIME(): Returns the current time.- DATE(): Extracts the date part of a date or datetime expression.- DATEDIFF(): Returns the number of days between two date…
What are the differences between DELETE, TRUNCATE, and DROP commands in SQL? Provide examples.
Answer:
DELETE:The DELETE command is used to remove rows from a table based on a specified condition. It can delete all…
|-- Week 1: Introduction to Data Analysis| |-- Data Analysis Fundamentals| | |-- What is Data Analysis?| | |-- Types of Data Analysis| | |-- Data Analysis Workflow| |-- Tools and Environment Setup| | |-- Overview of Tools (Excel, SQL)| | |-- Installing Necessary…
What is a correlated subquery in SQL? Provide an example to illustrate its usage.
A correlated subquery is a subquery that references a column from the outer query. This means the subquery is executed once for…
1. SELECT statement: Basic querying of data. SELECT * FROM table_name; 2. WHERE clause: Filtering rows based on conditions. SELECT * FROM table_name WHERE condition; 3. ORDER BY: Sorting results. SELECT * FROM…
What are aggregate and analytic functions in SQL? Provide examples of each.
Answer: - Aggregate functions perform calculations on a set of values and return a single value. Examples include SUM(), AVG(), COUNT(), MIN(), and MAX().