1st lesson free
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Ayan
- Rate €5
- Response 1h
€5/h
Contact
1st lesson free
- SQL
- PostgreSQL
Join the Ultimate SQL Masterclass: Go From Zero to Query Hero Classes on Weekends | Self Paced | Learn via Implementation
- SQL
- PostgreSQL
Lesson location
About Ayan
2+ years of Working Experience in a Fortune 500 product-based organization.
Mentoring since 4+ years internationally.
I believe students thrive when learning and implementation goes hand in hand.
> > What I offer as a mentor:
End-to-End Database Mastery: Mastering the workflow from database design to complex data architecture.
Tool Proficiency: In-depth training in SQL syntax, multi-table joins, subqueries, CTEs.
Performance Optimization: Practical knowledge in database indexing, query tuning, and reading execution plans.
Practical Mentorship: 1:1 sessions focused on "implementation," optimizing slow queries, and debugging together.
If you’re looking to transition into data or want to sharpen your technical edge with a structured backend roadmap, let's connect.
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About the lesson
- Primary
- Junior Cycle
- Transition Year
- +13
levels :
Primary
Junior Cycle
Transition Year
Fifth Year
Sixth Year
Adult education
Bachelor's degree
Master's degree
Diploma
Doctorate degree
Other
Beginner
Intermediate
Advanced
Professional
Kids
- English
All languages in which the lesson is available :
English
Classes on Weekends.
1 Hour Class
Topics :
1. Basics & Retrieval
[Syntax: SELECT, FROM, AS] [Filtering: WHERE, LIKE, IN, BETWEEN] [Sorting: ORDER BY, LIMIT]
2. Aggregation & Grouping
[Functions: COUNT, SUM, AVG, MIN, MAX] [Grouping: GROUP BY] [Filtering Groups: HAVING]
3. Joining Tables
[Core Joins: INNER, LEFT, RIGHT, FULL OUTER] [Self & Cross: Self Joins, CROSS JOIN] [Set Operations: UNION, UNION ALL]
4. Subqueries & CTEs
[Subqueries: Nested, Correlated] [CTEs: WITH clauses] [Logic: CASE WHEN conditionals]
5. Data Modification
[DML: INSERT, UPDATE, DELETE, TRUNCATE] [DDL: CREATE, ALTER, DROP] [Constraints: PRIMARY, FOREIGN KEY]
6. Optimization & Tuning
[Indexing: Clustered, Non-Clustered] [Performance: EXPLAIN plans, Tuning] [Transactions: COMMIT, ROLLBACK, ACID]
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Recommendations
Recommendations come from relatives, friends and acquaintances of the teacher
1
Ayan is a really good tutor. We are both into teaching. He is really patient and approachable.
Very knowledgeable tutorView more recommendations
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Rates
Rate
- €5
Pack prices
- 5h: €25
- 10h: €50
online
- €5/h
free lessons
The first free lesson with Ayan will allow you to get to know each other and clearly specify your needs for your next lessons.
- 1hr
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