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How to find duplicates in 2 columns not 1
...composite key between the two fields. This will require a unique stone_id and upcharge_title for each row.
As far as finding the existing duplicates try this:
select stone_id,
upcharge_title,
count(*)
from your_table
group by stone_id,
upcharge_title
having coun...
How to check if a query string value is present via JavaScript?
...k they lead to cleaner code, since they help me avoid nested if statements and show exactly what is going on at a certain point in code. As for the stict cases, both the left hand and right hand sides will always be numbers, so what difference would switching to strict equality operators make?
...
How long should SQL email fields be? [duplicate]
...dress field is going to be arbitrary. However, I was wondering what the "standard" is? How long do you guys make it? (same question for Name field...)
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In a Git repository, how to properly rename a directory?
... to copy the directory to be renamed to a new directory with desired name, and delete the old directory , and git add , git commit and push everything. But is this the best way?
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Indentation shortcuts in Visual Studio
I'm new to Visual Studio 2010 and C#. How can I indent the selected text to left/right by using shortcuts?
8 Answers
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What is the difference between UNION and UNION ALL?
What is the difference between UNION and UNION ALL ?
26 Answers
26
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How to format strings using printf() to get equal length in the output?
...o functions, one which produces messages like Starting initialization... and another which checks return codes and outputs "Ok" , "Warning" or "Error" . However, the output that is produced is of the different length:
...
Finding element's position relative to the document
... First,you need to decide whether to take account of border and margin according to box-sizing. Second, the collapsed margin should be considered. And last, there will be more complicated situation in the future which would make this answer worse.
– xianshenglu
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Prefer composition over inheritance?
...this case, it makes sense to extract it out as an interface / class / both and make it a member of both classes.
Update: Just came back to my answer and it seems now that it is incomplete without a specific mention of Barbara Liskov's Liskov Substitution Principle as a test for 'Should I be inher...
how to edit .csproj file
...about projects that make up your solution.
If you are using Visual Studio and have the need to view or edit your CSPROJ file while in Visual Studio you can do so by the following these simple steps:
Right click on your project in solution explorer and select Unload Project
Right click on the proj...