大约有 44,000 项符合查询结果（耗时：0.0468秒） [XML]
querySelector search immediate children
... you'll need a shim if you want to use it. I built scopedQuerySelectorShim for this purpose.
– lazd
Jan 15 '14 at 0:43
3
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Insert into a MySQL table or update if exists
...
+1 From what I've found, this method is less problematic for auto-increment keys and other unique key collisions than REPLACE INTO, and it is more efficient.
– Andrew Ensley
May 11 '12 at 21:27
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Accessing Object Memory Address
...nteger (or long integer)
which is guaranteed to be unique and
constant for this object during its
lifetime. Two objects with
non-overlapping lifetimes may have the
same id() value. (Implementation note:
this is the address of the object.)
So in CPython, this will be the address of the ...
How can I do an UPDATE statement with JOIN in SQL Server?
...udid;
Note that the target table must not be repeated in the FROM clause for Postgres.
Oracle:
update
(select
u.assid as new_assid,
s.assid as old_assid
from ud u
inner join sale s on
u.id = s.udid) up
set up.new_assid = up.old_assid
SQLite:
update ...
How to select unique records by SQL
When I perform "SELECT * FROM table" I got results like below:
8 Answers
8
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Can Selenium interact with an existing browser session?
...le to communicate with and act through a browser that is already running before launching a Selenium Client?
11 Answers
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Get Specific Columns Using “With()” Function in Laravel Eloquent
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Thank you for sharing this. Where did you discover this possibility? I didn't find this in the Laravel docs.
– Symen Timmermans
Apr 2 '14 at 14:28
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How can I get a user's media from Instagram without authenticating as a user?
... it helps someone as I did not see it in Instagram's documentation.
To perform GET on https://api.instagram.com/v1/users/<user-id>/media/recent/ (at present time of writing) you actually do not need OAuth access token.
You can perform https://api.instagram.com/v1/users/[USER ID]/media/recent...
Surrogate vs. natural/business keys [closed]
...are NOT NULL UNIQUE) then you are likely in violation of Boyce-Codd Normal Form. BCNF is beyond 3NF, so not many people worry about it. There are situations, however, where being in BCNF is very helpful.
– Alan
Sep 17 '08 at 17:19
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sqlalchemy flush() and get inserted id?
...e code should have worked as it is. SQLAlchemy should be providing a value for f.id, assuming its an autogenerating primary-key column. Primary-key attributes are populated immediately within the flush() process as they are generated, and no call to commit() should be required. So the answer here ...