database - Understanding COMPATIBILITY_LEVEL in SQL Server -

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i understood setting database compatibility_level prior native 1 prevented features being used. doesn't seem case. witness following sql script:

create database foo go use foo go alter database foo set compatibility_level = 80 go  create table bar (     id uniqueidentifier not null,     testnvcmax nvarchar (max) not null, -- arrived in sql 2005     testdatetime2 datetime2 (7) not null -- arrived in sql 2008 ) go

but table creates - ideas? have thought kind of error message or warning have been appropriate

here can read differences between compatibility level 80, 90 , 100. alter database compatibility level

apparently new data types not affected. think compatibility level there make sql server "behave" older version, not prevent doing new fancy stuff.


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