如何在mysql中选择一行中的第一个空列

Question

I am a MySQL newbie. Consider this is how a row looks on a table in my database

id q1 q2 q3 q4 q5

and the values for each of these columns is as follows

01 abc null null null

which means that the 3rd column (q2) is null

I would like to select this null column using MySQL. In this example, I know that q3 is null, however, when this code is running on my website, I will have to find out the null column and will have to insert values into that. Can anyone help me here?

Thanks in advance.

Answer 1

从mytable中选择*，其中column =空限制1