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Once in a while, you will come across scenarios where you would like to run a pre-defined function but not against a table. For example, you would like to know the date or perform some computations, but what if I don't want to use a user-defined table...
How do you select the first N rows in various databases? A quick thing to remember is that rows are not stored in any particular sequence in a database. They can be placed in random data blocks in the database without any order whatsoever. If a query...