Follow the levels in order. Complete assignments before moving ahead.
▶ Level 1
Interview Focus
No interview topics
Level 1
SQL Introduction & Installation
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1.2 Hours
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▶ Level 2
Interview Focus
No interview topics
Level 2
SQL Commands
This section covers all core SQL command types, including DDL for creating database structures, DML for inserting and modifying data, DQL for querying data, TCL for managing transactions, and DCL for controlling user access and security.
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2.0 Hours
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▶ Level 3
Interview Focus
No interview topics
Level 3
Keys And Constraints
This section explains different types of keys and constraints in SQL, including Primary, Unique, Composite, Candidate, and Foreign Keys, and how constraints help maintain data integrity, relationships, and consistency in a database.
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2.0 Hours
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▶ Level 4
Interview Focus
No interview topics
Level 4
SQL Joins
This section covers SQL Joins, explaining how to combine data from multiple tables using INNER, LEFT, RIGHT, and FULL OUTER joins to retrieve meaningful and related information.