what are collection attributes
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I have table that has student names in it.If I query on the names my result set should return as 'VALUE NOT ENTERED' for null entries.
in fun why return single value?
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can we use a having cluase in groupby clause. if there are 500 records i will give rownumber<250 then how many records does it retrieve. wt is the result of nvl2(null,notnull,null) if there are four tables without using cartesian how many joins can be there. in the sql subqueries wt is the parent ans1)select 2)update,3) delete 4)2&3
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what is thae main difference between foreingkey and primarykey
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what are collection attributes