Sql delete and append Post: 302909017

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Top Forums UNIX for Dummies Questions & Answers Sql delete and append Post 302909017 by rsi.245 on Sunday 13th of July 2014 05:02:38 PM

07-13-2014

Registered User

Sql delete and append

Hi
I have a question on appending and deleting entries in mysql table.

This is my sample table. table name: details

Code:

id_name | model | mode | media| first | end | id | level |
+--------------------+-------+---------+-----+-------+-------+--------+--------+
| PSK_30s1207681L002 | -1 | 1 | 5 | 14026 | 14684 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 5 | 14026 | 14838 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 5 | 14026 | 15236 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 5 | 14026 | 15423 | 6255 | q |
| PSK_30s1207681L002 | 1 | 1 | N | 14026 | 15627 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 3 | 14033 | 15627 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 3 | 14756 | 15627 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 3 | 14892 | 15627 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 3 | 15304 | 15627 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 3 | 15550 | 15627 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | T0 | 15550 | 16050 | 6255 | q |
| PSK_30s1189731L001 | -1 | 1 | 3 | 999 | 7531 | 9808 | c |
| PSK_30s1189731L001 | -1 | 1 | 3 | 999 | 6487 | 9808 | c |
| PSK_30s1189731L001 | -1 | 1 | 5 | 6609 | 8257 | 9808 | c |
| PSK_30s1189731L001 | -1 | 1 | 3 | 999 | 6285 | 9808 | c |
| PSK_30s716971L003 | -1 | 1 | T0 | 23604 | 24104 | 2285 | c |
| PSK_30s716971L003 | -1 | 1 | 3 | 24070 | 24104 | 2285 | c |
| PSK_30s716971L003 | -1 | 1 | 3 | 24070 | 27133 | 2285 | c |
| PSK_30s716971L003 | -1 | 1 | 3 | 24070 | 28318 | 2285 | c |
| PSK_30s716971L003 | 1 | 1 | N | 24070 | 28326 | 2285 | c |
| PSK_30s716971L003 | -1 | 1 | 5 | 27036 | 28326 | 2285 | c 
| PSK_30s716971L003 | -1 | 1 | 5 | 27483 | 28326 | 2285 | c

I have numerous entries of same id name belonging to same median number.However,I want to only retain the entries having the longest first and end position and discard the remaining entries

For eg for id name ="PSK_30s1207681L002" AND median = 5 we have four entries

Code:

id_name | model | mode | media| first | end | id | level |
+--------------------+-------+---------+-----+-------+-------+--------+--------+
| PSK_30s1207681L002 | -1 | 1 | 5 | 14026 | 14684 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 5 | 14026 | 14838 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 5 | 14026 | 15236 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 5 | 14026 | 15423 | 6255 | q |
| PSK_30s1207681L002 | 1 | 1 | N | 14026 | 15627 | 6255 | q |

but I want to retain only the one having longest first and end points i.e

Code:

| PSK_30s1207681L002 | -1 | 1 | 5 | 14026 | 15423 | 6255 | q |
| PSK_30s1207681L002 | 1 | 1 | N | 14026 | 15627 | 6255 | q |

Here ,since for id name ="PSK_30s1207681L002" & median = N we have only 1 entry I want retain that one.

---------- Post updated at 05:02 PM ---------- Previous update was at 05:01 PM ----------

My final table in mysql table should look like this.

Code:

id_name | model | mode | media| first | last | id | level |
| PSK_30s1207681L002 | -1 | 1 | 5 | 14026 | 15423 | 6255 | q |
| PSK_30s1207681L002 | 1 | 1 | N | 14026 | 15627 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | 3 | 14033 | 15627 | 6255 | q |
| PSK_30s1207681L002 | -1 | 1 | T0 | 15550 | 16050 | 6255 | q |
| PSK_30s1189731L001 | -1 | 1 | 3 | 999 | 7531 | 9808 | c |
| PSK_30s1189731L001 | -1 | 1 | 5 | 6609 | 8257 | 9808 | c |
| PSK_30s716971L003 | -1 | 1 | T0 | 23604 | 24104 | 2285 | c |
| PSK_30s716971L003 | -1 | 1 | 3 | 24070 | 28318 | 2285 | c |
| PSK_30s716971L003 | 1 | 1 | N | 24070 | 28326 | 2285 | c |
| PSK_30s716971L003 | -1 | 1 | 5 | 27036 | 28326 | 2285 | c

Is there anything that I could do to append it?

rsi.245

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