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Lesson Posted on 01/12/2021 Learn MS SQL Certification
Top 10 SQL Concepts for Job Interview
Kavaiya Yashumar Amrutlal
I can teach each and every topics very easily and make it stronger for the students.
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.
Answered on 20/10/2018 Learn MS SQL Certification
Avinash Shirode
IT professional 15+ years experience and Certified RPA, Python, ML and AI providing online Trainings
Answered on 21/11/2018 Learn MS SQL Certification
Geetha V.
Learn MS SQL Certification from the Best Tutors
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Manoj Kumar Vishwakarma
MS SQL SERVER DBA Trainer
Absolutely. The job of a DBA is not going anywhere. There will always need to be someone to manage the data, No matter where it lives. The role is changing however. With more data being stored in the cloud, DBA need to start learning about those systems so that they can ensure the data and its backups are properly maintained and safeguarded.
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Munna Gupta
Trainer
Answered on 21/11/2018 Learn MS SQL Certification
Geetha V.
| Delete | Truncate |
| Maintains transaction log | Minimal logging |
| Where condition can be used | Where condition cannot be used |
| It can activate trigger | It cannot activate trigger, as there is no logging happening |
| Slower than truncate | Faster in performance |
| Rollback is possible | Rollback is not possible |
Learn MS SQL Certification from the Best Tutors
Affordable fees Flexible Timings Choose between 1-1 and Group class Verified Tutors Answered on 02/11/2018 Learn MS SQL Certification
Manoj Kumar Vishwakarma
MS SQL SERVER DBA Trainer
Answered on 04/10/2018 Learn MS SQL Certification
Subbarao V
MSBI ,Power BI,SQL Server Training and Job Support
Answered on 07/11/2018 Learn MS SQL Certification
Mahesh C
It Professional Trainer With 20 Years of Experience in in Key Aspects of Software Development
Learn MS SQL Certification from the Best Tutors
Affordable fees Flexible Timings Choose between 1-1 and Group class Verified Tutors Answered on 25/10/2018 Learn MS SQL Certification
Omkar Sawant
Technology Trainer (Tableau/ MS SQL/SAS/ Talend Open Studio/ Salesforce/Python
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