SQL: Triggers – Views – Indexes

Contents

• “Active” data
• Triggers, Trigger options, Transition variables
• Statement-level trigger example
• BEFORE trigger example
• Statement- vs. row-level triggers
• System issues, Views, Creating and dropping views
• Using views in queries, Why use views?
• Modifying views, A simple case
• An impossible case, A case with too many possibilities
• INSTEAD OF triggers for views
• Indexes, Examples of using indexes
• Creating and dropping indexes in SQL
• Choosing indexes to create
• SQL features covered so far

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