Remove duplicates from the result set
Here's a challenge question that I was playing with a my free time during the work.I assume you have the basic HR example somewhere around (I hope is not in production).
Let's say you want to get employees from the employees table whose name is similar to another employee last name.
The easiest way is to join the two tables with a join condition that checks for the name and employee id. Here's what I came with.
*************
Select e1.last_name, e1.first_name b, e2.last_name c, e2.first_name d
employees employees join e1 e2
on (e1.last_name = e2.employee_id <>e2.last_name and e1.employee_id)
order by one;
************
The above query returns 10 rows. The first and the second are essentially the same. It is similarly, 3 & 4, 5 & 6, 7 and 8 and 9 and 10. The question is: is there a way that allows me to get rid of using only sql duplicate rows from the result set of this query. I sat on it for 15 minutes and I couldn't know. I'll try to watch my completed work once again.
Example:
SQL> column a format a10
SQL> column b format a10
SQL> column c format a10
SQL> column d format a10
SQL>
SQL>
SQL> select e1.last_name a , e1.first_name b, e2.last_name c, e2.first_name d
2 from employees e1 join employees e2
3 on ( e1.last_name = e2.last_name and e1.employee_id != e2.employee_id)
4 where e1.employee_id < e2.employee_id
5 order by a;
A B C D
---------- ---------- ---------- ----------
Cambrault Gerald Cambrault Nanette
Grant Kimberely Grant Douglas
King Steven King Janette
Smith Lindsey Smith William
Taylor Jonathon Taylor Winston
SQL>
Tags: Database
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In the case of a DML operation (for example, REMOVE) the sample data should show what look like the paintings before the DML, and results will be the content of the or the tables changed after the DML.
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Etbin
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No help for me looking for error 800F0922 Split from: http://answers.microsoft.com/en-us/windows/forum/windows_8-windows_update/i-receive-an-error-code-800f0922-when-i-try-to/1398e178-c421-40e5-ad03-e890cdf2cdf9
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Problem with the connection from Oracle to MS Excel - 64 bit
HelloI have problem connecting Excel to oracle 11.2 using DG4ODBC.OS - Windows 7 64 bitDatabase version: - Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64 bitCreated system using ODBC DSN:Name of Data Source = test12Oracle home path:-D