PostgreSQL: Sorting letters before numbers












0















I would like to order a bpchar column in the following order (first order by a-z, then numbers):



abc

bcd     

xrf/1     

zyd   

0/abc

0/bdc   

0/efg


How could I accomplish that?



Thank you






postgresql sql-order-by







share|improve this question



























    0















    I would like to order a bpchar column in the following order (first order by a-z, then numbers):



    abc
    
bcd     
    
xrf/1     
    
zyd   
    
0/abc
    
0/bdc   
    
0/efg


    How could I accomplish that?



    Thank you






    postgresql sql-order-by







    share|improve this question

























      0












      0








      0








      I would like to order a bpchar column in the following order (first order by a-z, then numbers):



      abc
      
bcd     
      
xrf/1     
      
zyd   
      
0/abc
      
0/bdc   
      
0/efg


      How could I accomplish that?



      Thank you






      postgresql sql-order-by







      share|improve this question














      I would like to order a bpchar column in the following order (first order by a-z, then numbers):



      abc
      
bcd     
      
xrf/1     
      
zyd   
      
0/abc
      
0/bdc   
      
0/efg


      How could I accomplish that?



      Thank you






      postgresql sql-order-by




      postgresql sql-order-by






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 16 '18 at 7:49









      user3193317user3193317

      46211




      46211
























          1 Answer
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          Can't fully tell from your question what you actually want. If it is the first character of the string you want to check whether it's numeric or alphabet, you may use a CASE expression in ORDER BY like this.



          select * FROM t ORDER BY
          
          CASE 
          
             WHEN col ~ '^[a-zA-Z]' THEN 1
          
             WHEN col ~ '^[0-9]'    THEN 2
          
           END,col;


          Demo






          share|improve this answer
























          • Thanks, yes thats it!

            – user3193317
            Nov 16 '18 at 12:29











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          1 Answer
          1






          active

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          active

          oldest

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          active

          oldest

          votes









          1














          Can't fully tell from your question what you actually want. If it is the first character of the string you want to check whether it's numeric or alphabet, you may use a CASE expression in ORDER BY like this.



          select * FROM t ORDER BY
          
          CASE 
          
             WHEN col ~ '^[a-zA-Z]' THEN 1
          
             WHEN col ~ '^[0-9]'    THEN 2
          
           END,col;


          Demo






          share|improve this answer
























          • Thanks, yes thats it!

            – user3193317
            Nov 16 '18 at 12:29
















          1














          Can't fully tell from your question what you actually want. If it is the first character of the string you want to check whether it's numeric or alphabet, you may use a CASE expression in ORDER BY like this.



          select * FROM t ORDER BY
          
          CASE 
          
             WHEN col ~ '^[a-zA-Z]' THEN 1
          
             WHEN col ~ '^[0-9]'    THEN 2
          
           END,col;


          Demo






          share|improve this answer
























          • Thanks, yes thats it!

            – user3193317
            Nov 16 '18 at 12:29














          1












          1








          1







          Can't fully tell from your question what you actually want. If it is the first character of the string you want to check whether it's numeric or alphabet, you may use a CASE expression in ORDER BY like this.



          select * FROM t ORDER BY
          
          CASE 
          
             WHEN col ~ '^[a-zA-Z]' THEN 1
          
             WHEN col ~ '^[0-9]'    THEN 2
          
           END,col;


          Demo






          share|improve this answer













          Can't fully tell from your question what you actually want. If it is the first character of the string you want to check whether it's numeric or alphabet, you may use a CASE expression in ORDER BY like this.



          select * FROM t ORDER BY
          
          CASE 
          
             WHEN col ~ '^[a-zA-Z]' THEN 1
          
             WHEN col ~ '^[0-9]'    THEN 2
          
           END,col;


          Demo







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 16 '18 at 11:47









          Kaushik NayakKaushik Nayak

          20.9k41332




          20.9k41332













          • Thanks, yes thats it!

            – user3193317
            Nov 16 '18 at 12:29



















          • Thanks, yes thats it!

            – user3193317
            Nov 16 '18 at 12:29

















          Thanks, yes thats it!

          – user3193317
          Nov 16 '18 at 12:29





          Thanks, yes thats it!

          – user3193317
          Nov 16 '18 at 12:29




















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