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SQL how to increase or decrease one for a int column in one command
... a database, I will assume MySQL.
INSERT INTO table SET x=1, y=2 ON DUPLICATE KEY UPDATE x=x+1, y=y+2
REPLACE INTO table SET x=1, y=2
They both can handle your question. However, the first syntax allows for more flexibility to update the record rather than just replace it (as the second one doe...
How to return a result (startActivityForResult) from a TabHost Activity?
I have 3 classes in my example:
Class A, the main activity. Class A calls a startActivityForResult:
5 Answers
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Best way to find the intersection of multiple sets?
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From Python version 2.6 on you can use multiple arguments to set.intersection(), like
u = set.intersection(s1, s2, s3)
If the sets are in a list, this translates to:
u = set.intersection(*setlist)
where *a_list is list expansion
Note that set.inters...
delete_all vs destroy_all?
...destroy_all: The associated objects are destroyed alongside this object by calling their destroy method
delete / delete_all: All associated objects are destroyed immediately without calling their :destroy method
share
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Callback of .animate() gets called twice jquery
Since I added some scrollTop -animation, some parts of my callback get called twice:
2 Answers
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What are “decorators” and how are they used?
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A good use case of $provide.decorator is when you need to do minor "tweak" on some third-party/upstream service, on which your module depends, while leaving the service intact (because you are not the owner/maintainer of the service). H...
How to assign an exec result to a sql variable?
How do you assign the result of an exec call to a variable in SQL? I have a stored proc called up_GetBusinessDay , which returns a single date.
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What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
...ave a NUMBER datatype really)
DB2
Turns out they all use the same specification (with a few minor exceptions noted below) but support various combinations of those types (Oracle not included because it has just a NUMBER datatype, see the above link):
| SQL Server MySQL Postgres ...
Custom sort function in ng-repeat
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Actually the orderBy filter can take as a parameter not only a string but also a function. From the orderBy documentation: https://docs.angularjs.org/api/ng/filter/orderBy):
function: Getter function. The result of this function will be sorted
us...
Add subdomain to localhost URL
I am writing an web application that behaves differently depending on a url prefix. The format is something like:
5 Answers...