UrbanPro
true

Learn SQL Programming from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Search in

Top 10 SQL Concepts for Job Interview

Kavaiya Yashumar Amrutlal
30/11/2021 0 0



1. SELECT and FROM: This is the “heart” of any SQL query - SELECT columns FROM table.

2. WHERE: This acts as a filter and allows you to select only relevant rows based on conditions.

3. GROUP BY: This helps you aggregate the data by grouping columns.

4. AVG/SUM/MAX/MIN: These are aggregate functions that help you summarise the data.

5. COUNT and DISTINCT: Count helps you find the number of entries and Distinct helps you find unique entries.

6. CASE WHEN: This is a very useful way to create a new derived field or perform complex aggregate operations.

7. JOIN: Join helps you combine data from different tables using join conditions. Please get familiar with inner and left/right/full outer joins.

8. UNION: Union and Union All help you to combine data from multiple tables with similar structure.

9. WINDOW FUNCTION: Allow you to perform calculations across a set of rows.

10. CTE and SUBQUERY: They help you create more complex queries by combining smaller queries.

0 Dislike
Follow 1

Please Enter a comment

Submit

Other Lessons for You


SQL Join Types
There are four basic types of SQL joins: inner, left, right, and full. The easiest and most intuitive way to explain the difference between these four types is by using a Venn diagram, which shows all...

Microsoft Word
Microsoft Word is a widely used commercial word processor designed by Microsoft. Microsoft Word is a component of the Microsoft Office suite of productivity software, but can also be purchased as a stand-alone...

Truncate, Drop And Delete Commands In SQL
Truncate: Truncate command will delete the Table data only, it keeps the table schema as it is. Table data Can be rollback Example : TRUNCATE TABLE User; Drop: Drop command will delete both...

SQL
Structured query language-It is a language to interact with the database. Database-It is a collection of data's in the form of tables. Tables-Collection of rows and columns Rows are also called as tuples...
X

Looking for SQL Programming Classes?

The best tutors for SQL Programming Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Learn SQL Programming with the Best Tutors

The best Tutors for SQL Programming Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more