oracle - PL/SQL Using aliases and functions in the subquery of an insert statement -


i'm pretty new pl/sql, wondering if there way achieve following :

   insert  atable (    select  fn_to_value(b.field1, b.field2, b.field3) alias1,            fn_to_value(b.field1, b.field2, b.field3) alias2,            fn_to_value(b.field1, b.field2, b.field3) alias3,            c.field1, c.field2       btable b, ctable c      b.alias1= c.field3    );

given fn_to_value function returns corresponding datatype in atable.

i following error statements : 

pl/sql : sql statement ignored (that's located @ insert line) pl/sql : ora-00904: "b"."alias1" invalid identifier

errata :

  • i had modify clause where b.alias1= c.field1 where b.alias1= c.field3 because 1 of solution provided @bob jarvis wouldn't take consideration other fields might required link table btable , ctable.

solution :

  • i have opted following solution : 

     insert  atable (    select b.alias1,           b.alias2,           b.alias3,           c.field1,           c.field2    ctable c,     (      select fn_to_value (field1, field2, field3) alias1,             fn_to_value (field1, field2, field3) alias2,             fn_to_value (field1, field2, field3) alias3      btable     ) b    b.alias1 = c.field3 ); 

insert  atable ( select inner.alias1,        inner.alias2,        inner.alias3,        inner.field1,        inner.field2   (select fn_to_value (b.field1, b.field2, b.field3) alias1,                fn_to_value (b.field1, b.field2, b.field3) alias2,                fn_to_value (b.field1, b.field2, b.field3) alias3,                c.field1,                c.field2           btable b, ctable c          ) inner  inner.alias1 = inner.field1 )

or 

insert  atable ( select fn_to_value (b.field1, b.field2, b.field3) alias1,        fn_to_value (b.field1, b.field2, b.field3) alias2,        fn_to_value (b.field1, b.field2, b.field3) alias3,        c.field1,        c.field2   btable b, ctable c  fn_to_value (b.field1, b.field2, b.field3) = c.field1    );

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