SQL Practice #1 – Aggregating & LEFT JOIN Create a report that returns a list of all country names (in English), together with the number of related cities we have in the database. You need to show all countries as well as give a reasonable name to the aggregate column. Order the res...
Learning SQL will set you on the path to becoming a true data professional. Browse our top SQL training courses and learning paths found only on Pluralsight.
Learn the SQL standard and other SQL dialects comprehensively or simply upskill yourself with our interactive online SQL courses.
Since most users will be learning SQL to interact with an existing database, the lessons begin by introducing you to the various parts of an SQL query. The later lessons will then show you how to alter a table (or schema) and create new tables from scratch. Each lesson will introduce a...
s StandardSQL or PostgreSQL, this meant some of the techniques I would normally apply wouldn’t work. This was frustrating at first, but at the same time it’s a good chance to practice other techniques that you might not think of when using the variant of SQL with which you regularly ...
"Update", "Delete", "Create", and "Drop" can be used to accomplish almost everything that you need to do with a database. This SQL tutorial will provide you with the instruction on the basics of each of these commands as well as allow you to put them to practice using the SQL ...
Now, let’s write 2 simple SQL SELECT statements and check if this is really true: 1 2 3 4 5 SELECT* FROMcity; SELECT* FROMcustomer; We can easily notice few things: Not all cites were used (only these with ids 1, 3 and 4 were) ...
Use the latest SQL Server Management Studio Use Query Performance Insight in Azure SQL Database Use Query Store with Elastic Pool databases Start with query performance troubleshooting Show 9 more Applies to: SQL Server 2016 (13.x) and later versions ...
“I need to move my SQL skills past SELECT * FROM SILLY_TABLE; and I need to learn ANSI joins vs Oracle joins. Being hard-headed I keep going back a chapter and re-doing and then apply to company DB to see how things work in my world. ...
Begin Transaction with If Condition BEGIN TRANSACTION within TRY - CATCH or vice versa Best practice to handle the paging and performance in SQL Stored procedure Best Practice: Use of semi-colon to terminate statements; Best practices in writing queries for huge dataset Best way to delete 311 mil...