Here's an example:. Better yet is to use a predefined and application-standard assertion package. That way, your code could look more like this:. Don't have an assertion package? No problem! Grab mine from LiveSQL. If you'd like to go down that rabbit hole, start here. Bullet-proof your subprograms with assertion logic to ensure that your program is free of nulls when that is how it should be. See the original article here. Thanks for visiting DZone today,.
Edit Profile. Sign Out View Profile. Over 2 million developers have joined DZone. Then, take steps to avoid that confusion and those errors. Like 2. Join the DZone community and get the full member experience.
Join For Free. First, and most important, remember that: Null is never equal to anything else, including null. END; You can rest assured that the code represented by With that, let's dive into the details.
END; But I suggest that you do not. END; Don't worry; Oracle is never going to change this behavior, so you don't have to "take out insurance. Compare the following two blocks. Instead, you will need to do one of the following: Use a datatype for the parameter that cannot be null. Then take steps in your code to avoid that confusion and those errors.
Opinions expressed by DZone contributors are their own. But AND? I don't think so. Please, prove it! And your LiveSQL script already proved that. Best regards, Jan. That's what I get for answering commentary on my blog at AM. Sorry bout that, Jan, you are right and I am wrong. No worries! I had an advantage - I'm 9 hours ahead and already had my sleep. Post a Comment.
December 04, Wait, you might be saying: Why do you have to provide a value for ID? That's because identity columns can never be set to NULL. Identity columns are new to But I suggest that you do not.
Labels database null oracle plsql sql. Labels: database null oracle plsql sql. Anonymous December 4, at AM. Dual returns 1 row, rownum adds 0 or 1 rows, and max groups to exactly 1. This gives 0 for no rows in a table and 1 for any other number of rows. I extend the where clause to count rows by condition, remove rownum to count rows meeting a condition, and increase rownum to count rows meeting the condition up to a limit. By doing this, you will get the count that you want or Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Ask Question. Asked 10 years, 4 months ago. Active 3 years, 11 months ago. Viewed k times. Improve this question. Sapience Sapience 1, 3 3 gold badges 13 13 silver badges 23 23 bronze badges. Add a comment. Active Oldest Votes. Improve this answer. Shannon Severance Adam Paynter Adam Paynter 45k 30 30 gold badges silver badges bronze badges.
Sapience, that isn't a problem, just put the logic after the END of this nested block. Shannon: Thanks for the edit. I know it's an old thread, but I still think it's worth to answer it. It works fine.
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