| http://www.w3.org/ns/prov#value | - Let's go step by step.CREATE TABLE #TEST(A varchar,B varchar(30)); ---> Field named A is of size 1 with type Varchar.ISNULL(A,B) ---> means:evaluate the field A, (the first parameter), if has something other than a NULL then return it to me otherwise return me the value converted to Varchar size 1 (As A is Varchar (1)) from varchar size 30 in field B for current record.So if you run SELECT A, B, I
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