updating table fields (single or more than one) as per requirement

Question

0.00/5 (No votes)

See more:

I've a table with fields:

SQL

create table test
( f1 varchar2(10),
f2 varchar2(10),
f3 varchar3(10)
)

insert into test values ('d1','d2','d3');
insert into test values ('d10','d20','d30');

I want to update the fields of the table as per need i.e update only one field leaving all the data of the fields as it is.
How can I do it ? Suppose I want to update only f1 (from d1 to x1) field leaving f2, and f3 as it is. I've written stored procedure to update all the fields but do not know how to do it??

SQL

CREATE OR REPLACE PROCEDURE UPDATE_TEST
( U_F1 TEST.F1%TYPE,
U_F2 TEST.F2%TYPE,
U_F3 TEST.F3%TYPE
)
IS
BEGIN
    UPDATE TEST SET F1 = U_F1,F2 = U_F2 WHERE F3 = U_F3;

    COMMIT;
  END;

Posted 14-Jun-12 0:00am

nischalinn

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

krumia · Answer 1 · 2012-06-14T01:24:00

Try this:

SQL

CREATE OR REPLACE PROCEDURE Update_Test (
   u_f1_ test.f1%TYPE DEFAULT NULL,
   u_f2_ test.f2%TYPE DEFAULT NULL,
   u_f3_ test.f3%TYPE DEFAULT NULL )
IS
BEGIN
   UPDATE test 
      SET f1 = NVL(u_f1_, f1),
          f2 = NVL(u_f2_, f2),
          f3 = NVL(u_f3_, f3);
   COMMIT;
END Update_Test;

You can pass NULL to the fields you do not want to update.

Few side notes on coding style:
1. See how I have used variable names and table column names. I have used an underscore to end variable names, but no underscore to table column names. It's not a must, but I have found it easier to distinguish between variables and table columns.
2. See how each assignment in the SET clause of update statement is in a new line. I find this style more clearer.
3. See the capitalization: ALLCAPS for keywords/reserved words, SentenceCase for procedure names, simples for the rest. Oh, I use ALLCAPS to things like NVL, MAX, COUNT, ...