SQL Server Eng Part4
SQL Server Eng Part4
Created by Ajay Parmar
Course Description
-
β Introduction to CTEs β Understand the purpose and syntax of Common Table Expressions in SQL Server.
-
π CTE Syntax Breakdown β Learn how to use the
WITH
clause to define temporary result sets. -
π CTE vs. Derived Tables β Clear comparison showing how CTEs offer improved readability and reusability over nested subqueries.
-
π Using CTEs in Simple SELECT Queries β Build foundational skills using CTEs in basic queries.
-
π CTEs with JOINS β Learn how to join CTEs with other tables for more complex query scenarios.
-
π§ Code Clarity and Maintenance β Understand how CTEs improve query structure, especially in multi-step logic.
-
π΅οΈββοΈ Nested and Chained CTEs β Introduction to multiple CTEs in a single query block for step-by-step transformation.
-
π Debugging Made Easier β How CTEs simplify troubleshooting compared to deeply nested derived tables.
-
π§Ή Cleaner Queries β Demonstrate how CTEs make SQL scripts more modular and easier to read.
-
π Real-World Use Cases β Practical examples to show where CTEs outperform traditional subqueries.
-
β Understanding Data Integrity β Learn the importance of enforcing valid, consistent, and accurate data in relational databases.
-
π Types of Constraints Explained β Deep dive into
PRIMARY KEY
,FOREIGN KEY
,UNIQUE
,CHECK
, andDEFAULT
constraints. -
ποΈ Creating Constraints β Syntax and examples for adding constraints during
CREATE TABLE
and usingALTER TABLE
. -
π§― Dropping Constraints β Learn how to drop constraints temporarily for data correction or maintenance.
-
π Restoring Constraints β Best practices to recreate constraints after temporary removal to preserve data integrity.
-
βοΈ Altering Constraints β Modify existing constraints safely using
ALTER TABLE
and understand limitations. -
π Parent-Child Table Relationships β Explore how foreign key constraints link related tables and enforce referential integrity.
-
π« Effect on
DELETE
andUPDATE
Operations β Understand constraint behavior withCASCADE
,SET NULL
, andNO ACTION
options. -
β οΈ Insert Violations and Prevention β How constraints prevent invalid
INSERT
operations and maintain consistency. -
π Practical Scenarios β Real-world examples showing how constraint violations can break integrityβand how to fix them.
-
π οΈ Best Practices for Data Integrity β Tips for managing constraints in production environments without breaking relationships.
Course Curriculum
CTE and Relationships
-
Common Table Expression Introduction
00:00 -
Dept wise incentive – Example2
00:00 -
Employee with Highest Score
00:00 -
Referntial Integrity Begins
00:00 -
Primary and Foreign key concept In detail
00:00 -
Delete query behaviour Parent to Child and vice versa
00:00 -
update query behaviour
00:00 -
Insert query behaviour under referential integrity
00:00 -
Surprise Test
00:00

-
LevelExpert
-
Total Enrolled1
-
Last UpdatedMay 22, 2025

SQL Server Eng Part4
-
LevelExpert
-
Total Enrolled1
-
Last UpdatedMay 22, 2025
Course Description
-
β Introduction to CTEs β Understand the purpose and syntax of Common Table Expressions in SQL Server.
-
π CTE Syntax Breakdown β Learn how to use the
WITH
clause to define temporary result sets. -
π CTE vs. Derived Tables β Clear comparison showing how CTEs offer improved readability and reusability over nested subqueries.
-
π Using CTEs in Simple SELECT Queries β Build foundational skills using CTEs in basic queries.
-
π CTEs with JOINS β Learn how to join CTEs with other tables for more complex query scenarios.
-
π§ Code Clarity and Maintenance β Understand how CTEs improve query structure, especially in multi-step logic.
-
π΅οΈββοΈ Nested and Chained CTEs β Introduction to multiple CTEs in a single query block for step-by-step transformation.
-
π Debugging Made Easier β How CTEs simplify troubleshooting compared to deeply nested derived tables.
-
π§Ή Cleaner Queries β Demonstrate how CTEs make SQL scripts more modular and easier to read.
-
π Real-World Use Cases β Practical examples to show where CTEs outperform traditional subqueries.
-
β Understanding Data Integrity β Learn the importance of enforcing valid, consistent, and accurate data in relational databases.
-
π Types of Constraints Explained β Deep dive into
PRIMARY KEY
,FOREIGN KEY
,UNIQUE
,CHECK
, andDEFAULT
constraints. -
ποΈ Creating Constraints β Syntax and examples for adding constraints during
CREATE TABLE
and usingALTER TABLE
. -
π§― Dropping Constraints β Learn how to drop constraints temporarily for data correction or maintenance.
-
π Restoring Constraints β Best practices to recreate constraints after temporary removal to preserve data integrity.
-
βοΈ Altering Constraints β Modify existing constraints safely using
ALTER TABLE
and understand limitations. -
π Parent-Child Table Relationships β Explore how foreign key constraints link related tables and enforce referential integrity.
-
π« Effect on
DELETE
andUPDATE
Operations β Understand constraint behavior withCASCADE
,SET NULL
, andNO ACTION
options. -
β οΈ Insert Violations and Prevention β How constraints prevent invalid
INSERT
operations and maintain consistency. -
π Practical Scenarios β Real-world examples showing how constraint violations can break integrityβand how to fix them.
-
π οΈ Best Practices for Data Integrity β Tips for managing constraints in production environments without breaking relationships.
Course Curriculum
CTE and Relationships
-
Common Table Expression Introduction
00:00 -
Dept wise incentive – Example2
00:00 -
Employee with Highest Score
00:00 -
Referntial Integrity Begins
00:00 -
Primary and Foreign key concept In detail
00:00 -
Delete query behaviour Parent to Child and vice versa
00:00 -
update query behaviour
00:00 -
Insert query behaviour under referential integrity
00:00 -
Surprise Test
00:00