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How do I disallow NULL values in a table?
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Statement, PrepareStatement and Callable all these are interfaces. Thought it is a interface how come we are creating objects and calling methods("preparestatement()") in it. In which class this method is defined. Please let me know. Thanks in advance. example: PreparedStatement pre = con.prepareStatement( "UPDATE COFFEES SET SALES = ? WHERE COF_NAME LIKE ?");
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