How to convert '' (space kind of value to 0.

I have two fields ims and ems field where in few values are empty not null ie ems=''
How to convert empty value (i.e not null) or blank value as 0
Some where ims is empty and somewhere ems is empty

example
ims   ems   total
10               10
          20      20
10      30      40
40                40
40      50      90

The total should be ims + ems
both are of type varchar,
when i pick them i convert to int and then add
but the rows which contains empty value does nt get added up
how to make them consider as 0
searchsanjaysharmaAsked:
Who is Participating?

Improve company productivity with a Business Account.Sign Up

x
 
Patrick MatthewsConnect With a Mentor Commented:
>>How to use update on this.

Short answer: don't!  :)

Seriously, storing derived data like that is usually a bad idea.  But if you insist:

UPDATE mstmassstudents
SET total = CASE WHEN ISNUMERIC(ims) = 1 THEN CONVERT(int, ims) ELSE 0 END +
    CASE WHEN ISNUMERIC(ems) = 1 THEN CONVERT(int, ems) ELSE 0 END

Open in new window


If total is also varchar (again, bad idea)...

UPDATE mstmassstudents
SET total = CONVERT(varchar, 
    CASE WHEN ISNUMERIC(ims) = 1 THEN CONVERT(int, ims) ELSE 0 END +
    CASE WHEN ISNUMERIC(ems) = 1 THEN CONVERT(int, ems) ELSE 0 END)

Open in new window

0
 
Patrick MatthewsCommented:
SELECT ims, ems,
    CASE WHEN ISNUMERIC(ims) = 1 THEN CONVERT(int, ims) ELSE 0 END +
    CASE WHEN ISNUMERIC(ems) = 1 THEN CONVERT(int, ems) ELSE 0 END AS [total]
FROM SomeTable
0
 
Patrick MatthewsCommented:
BTW, you should not be using [n][var]char data types for this :)
0
Build your data science skills into a career

Are you ready to take your data science career to the next step, or break into data science? With Springboard’s Data Science Career Track, you’ll master data science topics, have personalized career guidance, weekly calls with a data science expert, and a job guarantee.

 
searchsanjaysharmaAuthor Commented:
How to use update on this.

As i ma having the statements as
update mstmassstudents set total=convert(varchar,convert(bigint,ims)+convert(bigint,ems)))
How to put it here in this context
0
 
searchsanjaysharmaAuthor Commented:
I had to keep that as the total has exceptional data. like E, I, F etc.
So i had to keep that
 Here again the problem would be there as isnumeric will not work for values like 13.7
0
 
Patrick MatthewsCommented:
I had to keep that as the total has exceptional data. like E, I, F etc.
So i had to keep that

Please take a step back and restate your question, because it seems to me that you have not actually communicated all of the relevant requirements.

Here again the problem would be there as isnumeric will not work for values like 13.7

What do you mean by "will not work"?  ISNUMERIC('13.7') returns 1.

If the problem is that it is truncating down to 13, well, in your original question you said you were converting these values to integers.

Again, please restate your question.
0
 
searchsanjaysharmaAuthor Commented:
I have resolved that, thanx.
0
 
searchsanjaysharmaAuthor Commented:
tx
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.