These SQL codes are Advanced SQL Queries Learnt from my mentor Luke Barrouse and it entails
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Introduction to Business Intelligence, SQL Server Architecture, and Basic Queries
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Key SQL Commands (CREATE, DROP, SELECT, INSERT, ALTER, UPDATE, etc.)
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SQL System Defined Functions
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Querying Database Tables (WHERE, ORDER BY, LIMIT, etc.)
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Handling NULL Values
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Aggregating Data with GROUP BY (Default & Customized Groupings)
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SQL Joins
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SQL Window Functions
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Subqueries
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Conditional Statements (CASE WHEN, IF ELSE)
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Stored Procedures
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Loops & Cursors
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Triggers
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Handling Exceptions & Errors in SQL
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Temporary Tables (Hash & Double Hash)
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SQL Views
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Security & Access Management
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Transactions (COMMIT & ROLLBACK)
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Indexes
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Pivot & Unpivot Functions