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Remove duplicate rows in MySQL
...de the IGNORE keyword. Like so:
ALTER IGNORE TABLE jobs
ADD UNIQUE INDEX idx_name (site_id, title, company);
This will drop all the duplicate rows. As an added benefit, future INSERTs that are duplicates will error out. As always, you may want to take a backup before running something like thi...
Facebook access token server-side validation for iPhone app
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Here's a two step process you can use to validate that a user access token belongs to your App:
1) Generate an App Access token
(https://developers.facebook.com/docs/howtos/login/login-as-app/)
https://graph.facebook.com/oauth/access_token?
client_id=YOUR_APP_ID
&am...
How to do a FULL OUTER JOIN in MySQL?
...on you have:
with two tables t1, t2:
SELECT * FROM t1
LEFT JOIN t2 ON t1.id = t2.id
UNION
SELECT * FROM t1
RIGHT JOIN t2 ON t1.id = t2.id
The query above works for special cases where a FULL OUTER JOIN operation would not produce any duplicate rows. The query above depends on the UNION set ope...
How to access the GET parameters after “?” in Express?
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Could you please tell me how to validate "id" ?
– Anand Raj
Feb 9 '17 at 8:47
1
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Check if key exists and iterate the JSON array using Python
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import json
jsonData = """{"from": {"id": "8", "name": "Mary Pinter"}, "message": "How ARE you?", "comments": {"count": 0}, "updated_time": "2012-05-01", "created_time": "2012-05-01", "to": {"data": [{"id": "1543", "name": "Honey Pinter"}]}, "type": "status", "i...
How to put more than 1000 values into an Oracle IN clause [duplicate]
...000 items in a static IN clause? I have a comma delimited list of many of IDs that I want to use in an IN clause, Sometimes this list can exceed 1000 items, at which point Oracle throws an error. The query is similar to this...
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How to get the data-id attribute?
I'm using the jQuery quicksand plugin. I need to get the data-id of the clicked item and pass it to a webservice.
How do I get the data-id attribute? I'm using the .on() method to re-bind the click event for sorted items.
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Exposing database IDs - security risk?
I've heard that exposing database IDs (in URLs, for example) is a security risk, but I'm having trouble understanding why.
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Can an html element have multiple ids?
I understand that an id must be unique within an HTML/XHTML page.
18 Answers
18
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“Insert if not exists” statement in SQLite
I have an SQLite database. I am trying to insert values ( users_id , lessoninfo_id ) in table bookmarks , only if both do not exist before in a row.
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