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How do I check if a column is empty or null in MySQL?
...S NOT NULL e.g.
SELECT myCol
FROM MyTable
WHERE MyCol IS NULL
In your em>x m>ample you have various permutations of white space. You can strip white space using TRIM and you can use COALESCE to default a NULL value (COALESCE will return the first non-null value from the values you suppy.
e.g.
SELECT ...
Viewing unpushed Git commits
...te repository? Occasionally, git status will print out that my branch is m>X m> commits ahead of origin/master , but not always.
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How to get the nem>x m>t auto-increment id in mysql
How to get the nem>x m>t id in mysql to insert it in the table
19 Answers
19
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How do I change the UUID of a virtual disk?
I am trying to create a new virtual machine with Oracle VirtualBom>x m>, using an already-em>x m>isting hard disk. When I try to select the em>x m>isting hard disk file, a .vhd file, it displays an error saying the virtual hard disk cannot be used because the UUID already em>x m>ists.
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Stack Memory vs Heap Memory [duplicate]
I am programming in C++ and I am always wondering what em>x m>actly is stack memory vs heap memory. All I know is when I call new, I would get memory from heap. If if create local variables, I would get memory from stack. After some research on internet, the most common answer is stack memory is temporar...
VIM Ctrl-V Conflict with Windows Paste
I am using VIM in Windows. The problem is that I want to use Ctrl V as a visual mode. However, this key has conflict with Windows paste. How can I reset this key back to VIM visual mode instead of pasting. I prefer to set this in my _vimrc configuration file.
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Switching a DIV background image with jQuery
I am making an em>x m>pand/collapse call rates table for the company I work for. I currently have a table with a button under it to em>x m>pand it, the button says "Em>x m>pand". It is functional em>x m>cept I need the button to change to "Collapse" when it is clicked and then of course back to "Em>x m>pand" when it is clic...
Why would I want stage before committing in Git?
I'm new to version control and I understand that "committing" is essentially creating a backup while updating the new 'current' version of what you're working on.
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Pretty graphs and charts in Python [closed]
...ts of data though (correct me if I'm wrong). You can't add labels to the am>x m>is to summarise the hlabels or vlabels. I can't see anyway to plot multiple lines on a graph or have any control over the colours used. I could hack away at the script... moving to matplotlib...
– Jon...