大约有 30,000 项符合查询结果（耗时：0.0424秒） [XML]
sqlalchemy unique across multiple columns
... that represents locations. Locations "belong" to customers. Locations are identified by a unicode 10 character code. The "location code" should be unique among the locations for a specific customer.
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findViewByID returns null
...days on something so trivial. I moved setContentView() above the findViewById() call and that did t he trick. thanks!
– agentcurry
Jan 26 '12 at 20:35
2
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Pointer to pointer clarification
...g to i, j, ip1, ip2 and ipp. You then assign to *ipp, which as we've seen means the same as "assign to ip1". Since you didn't assign to ipp a second time, it didn't change!
If you wanted to change ipp then you'll have to actually assign to ipp:
ipp = &ip2;
for instance.
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The object 'DF__*' is dependent on column '*' - Changing int to double
...se DB migrations of my framework (Laravel) and dropColumn there? I have no idea how to drop the constraint which has mysterious name, autogenerated by SQL server :(
– JustAMartin
Feb 15 '16 at 16:00
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Detect encoding and make everything UTF-8
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I totally agree. In fact, I didn't mean to state that as a general rule, just explain that this class might help you if that's the situation you happen to find yourself in.
– Sebastián Grignoli
Jun 27 '13 at 22:26
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SQL update from one Table to another based on a ID match
... Sales_Import SI
INNER JOIN
RetrieveAccountNumber RAN
ON
SI.LeadID = RAN.LeadID;
MySQL and MariaDB
UPDATE
Sales_Import SI,
RetrieveAccountNumber RAN
SET
SI.AccountNumber = RAN.AccountNumber
WHERE
SI.LeadID = RAN.LeadID;
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Scala: Abstract types vs generics
...lasses can be extended by inheritance, they may also be used as a flexible means of parameterization (often called family polymorphism, see this weblog entry for instance, and the paper written by Eric Ernst).
(Note: Family polymorphism has been proposed for object-oriented languages as a solution...
What's the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN? [duplicate]
... is the top left picture not simply SELECT * FROM TableB;? Why is the top middle picture not SELECT * FROM A INTERSECT SELECT * FROM B ? etc
– onedaywhen
Sep 9 '11 at 10:41
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How to return an empty ActiveRecord relation?
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A more portable solution that doesn't require an "id" column and doesn't assume there won't be a row with an id of 0:
scope :none, where("1 = 0")
I'm still looking for a more "correct" way.
share
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Multiple GitHub Accounts & SSH Config
...hub.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/me_rsa
Host work.github.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/work_rsa
My work profile didn't take until I did a ssh-add ~/.ssh/work_rsa. After that ...