From the course: Complete Guide to Advanced SQL Server
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Subtract items sold - SQL Server Tutorial
From the course: Complete Guide to Advanced SQL Server
Subtract items sold
The next trigger that I'll add to the inventory management system is to update the timestamps in the Products table any time the quantity on hand goes up or down. Let's start by taking a look at the Products table just to review where we're at. We have five products currently. The quantity on hand for product number one is currently set to 10, but it's zero for everything else. Now if you remember, the Products table has two columns, that store dates and times. That's the LastRestocked column and the LastSold columns. Now, I'm going to make an assumption here, and this might be a little bit of a simplification for the sake of the example, but I'm going to say that when the quantity of units decreases, that means that a product was sold. And when the quantity increases, that means that a product was restocked from the warehouse. I say this is a simplification because in the real world, there are more reasons why inventory levels might rise and fall. That could include products being…
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Contents
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Write and execute a stored procedure7m 43s
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Stored procedure input parameters7m 38s
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Stored procedure output parameters3m 38s
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Create a database trigger3m 37s
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Challenge: Use function in a stored procedure1m 25s
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Solution: Use function in a stored procedure7m 43s
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What is error handling?1m 52s
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Capture errors with TRY and CATCH4m 54s
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Generate errors with THROW4m 12s
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Manage transaction control4m 4s
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Challenge: Add error handling to a stored procedure1m 12s
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Solution: Add error handling to a stored procedure12m 12s
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Automate SQL Server with triggers1m 48s
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What are SQL Server triggers?3m 37s
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Two triggers types: INSTEAD OF and AFTER2m 34s
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Create a trigger to print a message6m 17s
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Timestamp a table modification5m 31s
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Firing INSTEAD OF triggers3m 23s
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Challenge: Create a trigger58s
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Solution: Create a trigger7m 10s
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The Anaconda open-source packages7m 27s
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Functions in the revoscalepy package1m 48s
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Model, train, and score with microsoftml1m 16s
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Produce graphics with Matplotlib7m 53s
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Get descriptive statistics with pandas7m 45s
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Challenge: Sample a DataFrame1m 12s
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Solution: Sample a DataFrame5m 21s
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Return values with indexes and series6m 8s
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Convert a series to a DataFrame4m 40s
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Add multiple series to a DataFrame3m 12s
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Include the index in a DataFrame4m 44s
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Slice a DataFrame to series4m 23s
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Challenge: Import and process data52s
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Solution: Import and process data6m 44s
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GameScore database final project setup2m 38s
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Create a trigger to add points to player records6m 30s
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Calculate global score with custom function4m 7s
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Write a stored procedure: Part 16m 19s
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Write a stored procedure: Part 24m 44s
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Add error handling and test the system: Part 16m 14s
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Add error handling and test the system: Part 25m 52s
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