How to use NOT IN in binary tree problem using MySQL
I am trying to solve this problem,
null
MySQL – group rows with different columns discarding Null values
I am fairly new and need help with this! How can I do a SELECT in MySQL to obtain from the following Table a result that joins all the rows in one with its columns? Table: ID Name Type1 Type2 Type3 Type4 1 ABC 123 Null Null Null 1 ABC Null 456 Null Null 1 … Read more
How to get the last non null value from the MYSQL table with the LAG
I’m tying a LAG function to retrieve the last non null value from the table to replace the null values in a row.
The code I’m using:
Convert NULL into meaningful value with MAX function – mySQL
Can anybody please help me out with an incredibly frustrating line of code in mySQL.
Accept null values but not by default in a MySql column
I just can’t can find an answer for my question. If there is on stack overflow, just post it and I will delete my post.
Using a Case Statement With IS NULL and IS NOT NULL
SELECT userid, userName, CASE userName WHEN (userName IS NULL) THEN 'was null' WHEN (userName IS NOT NULL) THEN 'was not null' END AS caseExpressionTest FROM top_users This does not give me the results I want. When the value is not null, I get ‘was null’, and when actually is null, I get an actual MYSQL … Read more
NULL in MySQL (Performance & Storage)
What exactly does null do performance and storage (space) wise in MySQL?
Why I am getting Cannot pass parameter 2 by reference error when I am using bindParam with a constant value?
I’m using this code and I’m beyond frustration:
PHP/MySQL Insert null values
I’m struggling with some PHP/MySQL code. I am reading from 1 table, changing some fields then writing to another table, nothing happens if inserting and one of the array values is null when I would like it to insert null in the database (null values are allowed for the field). It looks a bit like this:
MySQL: selecting rows where a column is null
I’m having a problem where when I try to select the rows that have a NULL for a certain column, it returns an empty set. However, when I look at the table in phpMyAdmin, it says null for most of the rows.