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Deleting rows with MySQL LEFT JOIN
...se (delete orphans): DELETE t1 FROM table1 AS t1 LEFT JOIN t2 AS t2 ON t1.uid = t2.result WHERE t2.result IS NULL
– Urs
Aug 26 '13 at 18:19
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Store query result in a variable using in PL/pgSQL
...g for SELECT INTO:
select test_table.name into name from test_table where id = x;
That will pull the name from test_table where id is your function's argument and leave it in the name variable. Don't leave out the table name prefix on test_table.name or you'll get complaints about an ambiguous re...
remove objects from array by object property
... i++) {
var obj = arrayOfObjects[i];
if (listToDelete.indexOf(obj.id) !== -1) {
arrayOfObjects.splice(i, 1);
}
}
All you need to do to fix the bug is decrement i for the next time around, then (and looping backwards is also an option):
for (var i = 0; i < arrayOfObjects.le...
Jackson and generic type reference
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It works : I did the following: JavaType topMost = mapper.getTypeFactory().constructParametricType(MyWrapper.class, ActualClassRuntime.class); and then did the readValue and it finally worked :)
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What's the difference between jQuery's replaceWith() and html()?
...
Take this HTML code:
<div id="mydiv">Hello World</div>
Doing:
$('#mydiv').html('Aloha World');
Will result in:
<div id="mydiv">Aloha World</div>
Doing:
$('#mydiv').replaceWith('Aloha World');
Will result in:
Aloha Worl...
mysql update column with value from another table
... UPDATE participants_registrations INNER JOIN participants ON participants.id = participants_registrations.participantId INNER JOIN registrations ON registrations.id = participants_registrations.registrationId LEFT JOIN groups ON (groups.id = registrations.groupId) SET registrations.groupId = g...
schema builder laravel migrations unique on two columns
...ique key across multiple columns.
$table->unique(array('mytext', 'user_id'));
or (a little neater)
$table->unique(['mytext', 'user_id']);
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How do you dynamically add elements to a ListView on Android?
...e explain or suggest a tutorial to dynamically create a ListView in android?
7 Answers
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How do I drop a foreign key constraint only if it exists in sql server?
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The more simple solution is provided in Eric Isaacs's answer. However, it will find constraints on any table. If you want to target a foreign key constraint on a specific table, use this:
IF EXISTS (SELECT *
FROM sys.foreign_keys
WHERE object_id = O...
Permission denied (publickey) when deploying heroku code. fatal: The remote end hung up unexpectedly
...
You have to upload your public key to Heroku:
heroku keys:add ~/.ssh/id_rsa.pub
If you don't have a public key, Heroku will prompt you to add one automatically which works seamlessly. Just use:
heroku keys:add
To clear all your previous keys do :
heroku keys:clear
To display all your ...