How to calculate date and time differences in oracle?
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After using set unused can we enable the column again to use? Please give me some answers....
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How to use null as conditions in oracle?
how to find the second highest salary in a given table????
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Given two table employee and department EMP ---------------- empid deptid(fk) Dept --------------------- deptid(pk) deptname que-Write a query to find count of employee in each department. Expected Output- deptid countofEmployee --------------------------- 10 57 20 20 30 15
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