Query execution error: subquery in FROM must have an alias











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When a query is completed and executed, query execution errors are sometimes encountered as shown below.




ERROR: subquery in FROM must have an alias

LINE 2: from (

^

HINT: For example, FROM (SELECT ...) [AS] foo.




What's the difference between writing a "as foo" in the subquery and not writing it?










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  • 2




    Please put a Minimal, Complete, and Verifiable example in the question itself.
    – Rajesh Pandya
    Nov 22 at 5:32






  • 3




    Possible duplicate of subquery in FROM must have an alias
    – Phil
    Nov 22 at 5:37










  • Simply because its a derived table, not all DB require this. It doesnt matter if you add the as or not, but it has to be named in sql (because its enforced) even if you are not using it...
    – Çöđěxěŕ
    Nov 22 at 5:40

















up vote
-3
down vote

favorite












When a query is completed and executed, query execution errors are sometimes encountered as shown below.




ERROR: subquery in FROM must have an alias

LINE 2: from (

^

HINT: For example, FROM (SELECT ...) [AS] foo.




What's the difference between writing a "as foo" in the subquery and not writing it?










share|improve this question




















  • 2




    Please put a Minimal, Complete, and Verifiable example in the question itself.
    – Rajesh Pandya
    Nov 22 at 5:32






  • 3




    Possible duplicate of subquery in FROM must have an alias
    – Phil
    Nov 22 at 5:37










  • Simply because its a derived table, not all DB require this. It doesnt matter if you add the as or not, but it has to be named in sql (because its enforced) even if you are not using it...
    – Çöđěxěŕ
    Nov 22 at 5:40















up vote
-3
down vote

favorite









up vote
-3
down vote

favorite











When a query is completed and executed, query execution errors are sometimes encountered as shown below.




ERROR: subquery in FROM must have an alias

LINE 2: from (

^

HINT: For example, FROM (SELECT ...) [AS] foo.




What's the difference between writing a "as foo" in the subquery and not writing it?










share|improve this question















When a query is completed and executed, query execution errors are sometimes encountered as shown below.




ERROR: subquery in FROM must have an alias

LINE 2: from (

^

HINT: For example, FROM (SELECT ...) [AS] foo.




What's the difference between writing a "as foo" in the subquery and not writing it?







sql alias






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edited Nov 22 at 5:34









Phil

95.3k11136155




95.3k11136155










asked Nov 22 at 5:29









OH.hong

1




1








  • 2




    Please put a Minimal, Complete, and Verifiable example in the question itself.
    – Rajesh Pandya
    Nov 22 at 5:32






  • 3




    Possible duplicate of subquery in FROM must have an alias
    – Phil
    Nov 22 at 5:37










  • Simply because its a derived table, not all DB require this. It doesnt matter if you add the as or not, but it has to be named in sql (because its enforced) even if you are not using it...
    – Çöđěxěŕ
    Nov 22 at 5:40
















  • 2




    Please put a Minimal, Complete, and Verifiable example in the question itself.
    – Rajesh Pandya
    Nov 22 at 5:32






  • 3




    Possible duplicate of subquery in FROM must have an alias
    – Phil
    Nov 22 at 5:37










  • Simply because its a derived table, not all DB require this. It doesnt matter if you add the as or not, but it has to be named in sql (because its enforced) even if you are not using it...
    – Çöđěxěŕ
    Nov 22 at 5:40










2




2




Please put a Minimal, Complete, and Verifiable example in the question itself.
– Rajesh Pandya
Nov 22 at 5:32




Please put a Minimal, Complete, and Verifiable example in the question itself.
– Rajesh Pandya
Nov 22 at 5:32




3




3




Possible duplicate of subquery in FROM must have an alias
– Phil
Nov 22 at 5:37




Possible duplicate of subquery in FROM must have an alias
– Phil
Nov 22 at 5:37












Simply because its a derived table, not all DB require this. It doesnt matter if you add the as or not, but it has to be named in sql (because its enforced) even if you are not using it...
– Çöđěxěŕ
Nov 22 at 5:40






Simply because its a derived table, not all DB require this. It doesnt matter if you add the as or not, but it has to be named in sql (because its enforced) even if you are not using it...
– Çöđěxěŕ
Nov 22 at 5:40














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## Your Query should be like this ##



 Select * from (Select * from tblTest) V --V is an alias





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    ## Your Query should be like this ##



     Select * from (Select * from tblTest) V --V is an alias





    share|improve this answer

























      up vote
      0
      down vote













      ## Your Query should be like this ##



       Select * from (Select * from tblTest) V --V is an alias





      share|improve this answer























        up vote
        0
        down vote










        up vote
        0
        down vote









        ## Your Query should be like this ##



         Select * from (Select * from tblTest) V --V is an alias





        share|improve this answer












        ## Your Query should be like this ##



         Select * from (Select * from tblTest) V --V is an alias






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 22 at 8:01









        Md. Mehedi Hassan

        176




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