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How do I (or can I) SELECT DISTINCT on multiple columns?
I need to retrieve all rows from a table where 2 columns combined are all different. So I want all the sales that do not have any other sales that happened on the same day for the same price. The sales that are unique based on day and price will get updated to an active status.
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How to dismiss notification after action has been clicked
Since API level 16 (Jelly Bean), there is the possibility to add actions to a notification with
9 Answers
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Can I specify multiple users for myself in .gitconfig?
In my ~/.gitconfig , I list my personal email address under [user] , since that's what I want to use for Github repos.
20...
Validate that a string is a positive integer
I would like the simplest fail-safe test to check that a string in JavaScript is a positive integer.
13 Answers
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Check if checkbox is checked with jQuery
How can I check if a checkbox in a checkbox array is checked using the id of the checkbox array?
23 Answers
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Spring mvc @PathVariable
Can you give me a brief explanation and a sample in using @PathVariable in spring mvc? Please include on how you type the url?
I'm struggling in getting the right url to show the jsp page. Thanks.
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How to access app.config in a blueprint?
I am trying to access access application configuration inside a blueprint authorisation.py which in a package api. I am initializing the blueprint in __init__.py which is used in authorisation.py .
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Best way to select random rows PostgreSQL
I want a random selection of rows in PostgreSQL, I tried this:
12 Answers
12
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Submitting HTML form using Jquery AJAX
Im trying to submit a HTML form using AJAX using this example .
3 Answers
3
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Select rows which are not present in other table
...niques for this task, all of them standard SQL.
NOT EXISTS
Often fastest in Postgres.
SELECT ip
FROM login_log l
WHERE NOT EXISTS (
SELECT -- SELECT list mostly irrelevant; can just be empty in Postgres
FROM ip_location
WHERE ip = l.ip
);
Also consider:
What is easier t...