Question

I want to put some same value in some fields where data is not present, for that do I need to query each field and see if there is data present or not and accordingly put the data, or there is some other work arround.

Like

Name    Age    City
N        22      J
K                K
          23     L

Here I want to put data on those fields which don’t have data otherwise I don’t want to touch tghose fields. After inserting it should look like

Name    Age    City
N        22      J
K        Gar     K
Gar      23      L

There is no validation for the datatype, all are of same datatype. How should I write the query in that case..

Answer 1

If you just want to do this for all rows in the table you can do something like

UPDATE your_table
  SET name = NVL(name, 'Gar'),
      age = NVL(age, 'Gar');

This assumes that ‘age’ is a character field.

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