Technical Article

Intervals and Counts - Part 1

When using SQL Server, you frequently need to work with data that represents intervals of time. For example, consider intervals representing sessions, contracts, projects, and so on. Tasks related to interval manipulation are typically quite intriguing, especially because coming up with efficient solutions isn't easy. Itzik Ben-Gan explains

External Article

Baselining with SQL Server Dynamic Management Views

When you're monitoring SQL Server, it's better to capture a baseline for those aspects that you're checking, such as workload, Physical I/O or performance. Once you know what is normal, then performance tuning and resource provisioning can be done in a timely manner before any problems becomes apparent. We can prevent problems by being able to predict them. Louis shows how to get started.

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Question of the Day

Creating a JSON Document IV

I have this data in a table called dbo.NFLTeams

TeamID  TeamName       City             YearEstablished
------  --------       ----             ---------------
1       Cowboys        Dallas           1960
2       Eagles         Philadelphia     1933
3       Packers        Green Bay        1919
4       Chiefs         Kansas City      1960
5       49ers          San Francisco    1946
6       Broncos        Denver           1960
7       Seahawks       Seattle          1976
8       Patriots       New England      1960
If I run this code, how many rows are returned?
SELECT 
  YearEstablished,
  json_objectagg(city : TeamName)
FROM dbo.NFLTeams
GROUP BY  YearEstablished;

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