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2013-01-16T16:38:52.160
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For your example this would suffice (Oracle syntax): <pre><code>ORDER BY SUBSTR(name,4) </code></pre> If the number of characters before the first hyphen can vary, you can do this (again Oracle syntax): <pre><code>ORDER BY SUBSTR(name,INSTR(name,'-')+1) </code></pre> However that won't work if you have codes like: <pre><code>AAA-10-1 AAA-8-1 AAA-9-1 </code></pre> and expect <code>AAA-10-1</code> to appear after <code>AAA-9-1</code>. Then you will need to parse it further: <pre><code>ORDER BY LPAD(SUBSTR(name,INSTR(name,'-')+1, INSTR(name,'-',1,2)-INSTR(name,'-')-1),10,'0'), LPAD(SUBSTR(name,INSTR(name,'-',1,2)+1),10,'0') </code></pre> (NB I have used LPAD(x,10,'0') to turn a value like '1' into '0000000001' and so on, rather than use TO_NUMBER since this could fail if there are any non-numerics in your data.) Example: <pre><code>with data as ( select 'AAA-1' name from dual union all select 'PQR-1-4' name from dual union all select 'PQR-1-3' name from dual union all select 'AAA-10-10' name from dual union all select 'AAA-10-1' name from dual union all select 'AAA-9-10' name from dual union all select 'AAA-9-1' name from dual ) select * from data ORDER BY LPAD(SUBSTR(name,INSTR(name,'-')+1, INSTR(name,'-',1,2)-INSTR(name,'-')-1),10,'0'), LPAD(SUBSTR(name,INSTR(name,'-',1,2)+1),10,'0'); </code></pre> Output: <pre><code>NAME --------- PQR-1-3 PQR-1-4 AAA-9-1 AAA-9-10 AAA-10-1 AAA-10-10 AAA-1 </code></pre> And if AAA-1 should come first: <pre><code>ORDER BY LPAD(SUBSTR(name,INSTR(name,'-')+1, INSTR(name||'-','-',1,2)-INSTR(name,'-')-1),10,'0'), LPAD(SUBSTR(name,INSTR(name||'-','-',1,2)+1),10,'0') nulls first </code></pre>
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1. POOracle/MYSQL: Sort records from a select query on a column that contains alphanumeric values
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1. USTony Andrews
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