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Aggregates and GROUP BY

If you are generating reports, chances are you’ll want to use aggregate functions. If you don’t know what aggregate functions are, they are like the functions …

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Free SQL Webinar Recording

Here’s the webinar recording from our recent webinar training: Here’s what the webinar (35 minutes long, the action starts at about the 5:45 mark) covers: …

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FREE SQL Course For Beginners

We are proud to announce the release of our FREE SQL course, “HANDS-ON SQL FOR BEGINNERS (SELECT, FROM, & WHERE)”. Follow the link below to …

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Sakila Database

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Northwind Database

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Retailer Database

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Sales Orders Database

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SportsDB Database

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World Database

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Circus Database

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4 ways to find SQL jobs

There are two main reasons to spend time looking at prospective SQL jobs: To apply for and get a job (duh) To figure out what …

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Query challenge series #1

Today we’re excited to introduce a new blog series, the Query Challenge Series. Each time we’ll introduce a new query challenge, and go through how …

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Physician Database

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Query challenge series #2

QUESTION “What do we do when , lets say the boss wants to change the”NULL” to display as “N/A” ? For this query: SELECT customers.name, …

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Blog Database

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Patient Database

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