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How to reset postgres' primary key sequence when it falls out of sync?
...CE((SELECT MAX(id)+1 FROM your_table), 1), false);
COMMIT;
Source - Ruby Forum
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How do I search for an object by its ObjectId in the mongo console?
I've found this question answered for C# and Perl, but not in the native interface. I thought this would work:
12 Answers
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How can I generate a unique ID in Python? [duplicate]
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Perhaps uuid.uuid4() might do the job. See uuid for more information.
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Rails: Why does find(id) raise an exception in rails? [duplicate]
... ids (1, 5, 6), or an array of ids ([5, 6, 10]). If no record can be found for all of the listed ids, then RecordNotFound will be raised.
If you don't want the exception to be raised, use find_by_id, which will return nil if it can't find an object with the specified id. Your example would then b...
Get img thumbnails from Vimeo?
I want to get a thumbnail image for videos from Vimeo.
23 Answers
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SQL WHERE ID IN (id1, id2, …, idn)
... fixed list. However, a good SQL engine could optimize it to have equal performance like with IN. There's still the readability issue though...
Option 3 is simply horrible performance-wise. It sends a query every loop and hammers the database with small queries. It also prevents it from using any op...
'id' is a bad variable name in Python
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OK, for 'id' you're right, but the "in general..." comment still applies, don't you think?
– Kevin Little
Sep 19 '08 at 17:55
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MySQL ON vs USING?
...o. One can join tables ON a column, a set of columns and even a condition. For example:
SELECT * FROM world.City JOIN world.Country ON (City.CountryCode = Country.Code) WHERE ...
USING is useful when both tables share a column of the exact same name on which they join. In this case, one may say:
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Passing an array to a query using a WHERE clause
...s are still a quoted list, so it comes out as "WHERE id IN ( '1,2,3,4' )", for example. You need to quote each identifier separately, or else ditch the quotes inside the parentheses.
– Rob
May 25 '09 at 20:05
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How to select a single field for all documents in a MongoDB collection?
...ou only want one field but the document has 10 you have to explictly set 0 for 9 of them? Edit: Nevermind, excluding _id i.e. {field_I_want:1, _id:0} seems to work
– Karl Tryggvason
Oct 11 '16 at 11:07
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