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Top-N Queries in oracle can be in many methods: example 1:using the rownum select salary   from   (   select salary from employees   order by salary desc   […]
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When you face this issue You have 2 solutions: 1- Connect as sysdba and execute Alter pluggable database all open; 2- Or connect as sysdba and do this trigger CREATE […]
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Welcome to  MAXVLEARN Blog, We will add very nice articles in many fields. Hope that you will enjoy in our website . My name is khaled alkhudari – Founder for […]
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