Update query in sql where null

Another possible reason for the empty string, rather than a true null is that the field is an index or is part of an index. This happened to me: using phpMyAdmin, I edited the structure of a field in one of my tables to allow NULLs by checking the " Null " checkbox then hitting the " Save " button. That's when I realized that the field was part of the Primary key! I suspect the problem here is that quotes were entered as literals in your string value. You can set these columns to null using:.

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. How to update column with null value Ask Question. Asked 11 years, 3 months ago.

Active 1 year, 1 month ago. Viewed k times. Is there a special syntax to do this? Does the column allow a NULL value? No, not at all. It's really wierd — jim. Add a comment. Active Oldest Votes. Daniel Vassallo Daniel Vassallo k 70 70 gold badges silver badges bronze badges. Thanks Daniel. I'm kind of convinced that this issue may lie in my application code — jim.

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