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Transaction Isolation and the New Snapshot Isolation Level

Concurrency and transaction isolation are a prickly subject, difficult to explain with any kind of clarity without boring the reader and leaving their poor brain in a complete muddle. Therefore, it is often ignored in the vain hope it won't affect us and we can forget all about it. Well you can't ignore it any more and with SQL Server 2005 there's a whole new isolation level added to the four that already exist.

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Question of the Day

Creating a JSON Document III

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 TOP 2 
  json_objectagg('Team' : TeamName)
FROM dbo.NFLTeams;

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