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MySQL foreign key constraints, cascade delete
...RITY DEFINER
BEGIN
DELETE FROM
`products`
WHERE
`id` IN (
SELECT `products_id`
FROM `categories_products`
WHERE `categories_id` = category_ID
)
;
DELETE FROM `categories`
WHERE `id` = category_ID;
END
You also need to add the following foreign key constraints...
use Winmerge inside of Git to file diff
...GI, which allows you to review the list of files with a difference, before selecting one to examine its internal differences.
I have tweaked it to use only DOS commands
@echo off
setlocal
if "%1" == "-?" (
echo GitDiff - enables diffing of file lists, instead of having to serially
echo d...
Force “git push” to overwrite remote files
...
Since this is the selected answer, I will comment here. Using force isn't a problem when working by yourself. For example, my cloud host starts with it's own git. If I work locally and build a project, and I want to put it on my cloud host (Op...
How do I convert from stringstream to string in C++?
...str();
}
if you want the character type of your string could be run-time selectable, you should also make it a template variable.
template <class CharType, class NumType>
std::basic_string<CharType> YourClass::NumericToString(const NumType & NumericValue)
{
std::basic_ostrings...
How can I change a secret Gist to public?
...
Update:
You can still convert a secret gist to a public gist by first selecting "Edit" -> "Make Public". This feature has been partially rolled back, however, since 12/15/16 and you will no longer be able to switch it back to secret.
From the docs:
After creating a gist, you cannot conv...
CodeIgniter activerecord, retrieve last insert id?
...ed like this. may be wrong. but working well for me
$this->db->select_max('{primary key}');
$result= $this->db->get('{table}')->row_array();
echo $result['{primary key}'];
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...
Loop through each row of a range in Excel
...
Dim a As Range, b As Range
Set a = Selection
For Each b In a.Rows
MsgBox b.Address
Next
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Environment variables for java installation
...ava\jdk1.7.0_79 (depending on your JDK installation path it varies).
Then select the Path system variable and click Edit.... Keep the variable name as Path, and append C:\Program Files\Java\jdk1.7.0_79\bin; or %JAVA_HOME%\bin; (both mean the same) to the variable value.
Once you are done with abov...
Android Studio could not find any version that matches com.android.support:appcompat-v7:+
...
From Android Studio go to:
Tools >> Android >> SDK Manager
Select and install "Extras|Android Support Repository"
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Why am I merging “remote-tracking branch 'origin/develop' into develop”?
... following should do it:
git rebase @{u}
The above command tells Git to select all of the non-merge commits reachable from HEAD (the current commit), minus all the commits reachable from @{u} (which is shorthand for "the upstream branch", i.e., origin/master if HEAD is master), replay (cherry-pic...