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9.8

select statement with precedent when more than one row returned

Asked by ewang1205 in Oracle Database

For the emp table below, I need sql (select emp_no from emp where view_id =1) to do the following:
For a given view_id, if there a dept_no =10, then only return that emp_no, if no dept_no =10 then return emp_no with dept_no =11.  

Source data:
emp_no dept_no    view_id
101        10               1
102        11               1
103        11                2
104        10                3
105        11                3


Result set data:
emp_no dept_no    view_id
101        10               1
103        11                2
104        10                3
[+][-]04/28/09 01:39 PM, ID: 24254890Expert Comment

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[+][-]04/28/09 01:43 PM, ID: 24254941Author Comment

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[+][-]04/28/09 01:52 PM, ID: 24255016Accepted Solution

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About this solution

Zone: Oracle Database
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Solution Provided By: angelIII
Participating Experts: 1
Solution Grade: A
 
[+][-]04/28/09 01:55 PM, ID: 24255041Author Comment

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[+][-]04/28/09 02:04 PM, ID: 24255120Assisted Solution

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[+][-]04/28/09 02:13 PM, ID: 24255212Author Comment

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[+][-]04/28/09 02:18 PM, ID: 24255249Expert Comment

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