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How to set a default value for an existing column
...erver:
ALTER TABLE Employee ADD CONSTRAINT DF_SomeName DEFAULT N'SANDNES' FOR CityBorn;
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How to merge YAML arrays?
...l commands, you may be able to achieve this as follows:
# note: no dash before commands
some_stuff: &some_stuff |-
a
b
c
combined_stuff:
- *some_stuff
- d
- e
- f
This is equivalent to:
some_stuff: "a\nb\nc"
combined_stuff:
- "a\nb\nc"
- d
- e
- f
I have been ...
How to rename a single column in a data.frame?
.../false values. So it has the potential to change multiple column names if, for example, regular expressions are used.
– mikyatope
Dec 11 '13 at 16:21
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How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
...at as Matthew's answer is, I just needed a quick and dirty way of handling for checking some data. I also admit that my own knowledge is lacking right now in defining functions in SQL. I was only interested in numbers between 1 and 5 digits, so I changed the regex to E'\\d{1,5}$'.
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Get the current user, within an ApiController action, without passing the userID as a parameter
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Just don't forget using Microsoft.AspNet.Identity;
– Overlord
Nov 24 '16 at 8:06
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SQL - many-to-many table primary key
...or thinks the table is stored in an array rather than an extremely high performance balanced multi-way tree structure.
For a start, it's never necessary to store or get at the table sorted, just the index. And the index won't be stored sequentially, it'll be stored in an efficient manner to be able...
Scroll to bottom of Div on page load (jQuery)
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The other solutions here don't actually work for divs with lots of content -- it "maxes out" scrolling down to the height of the div (instead of the height of the content of the div). So they'll work, unless you have more than double the div's height in content inside ...
Change Schema Name Of Table In SQL
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sys.schemas is a table that contains all the schemas for the database. The Exec('...') just runs a dynamic SQL call, in this case it is needed because a CREATE SCHEMA command must be the first statement in a query batch and executing as dynamic SQL gets you this.
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List of zeros in python [duplicate]
...ist which contains only zeros? I want to be able to create a zeros list for each int in range(10)
8 Answers
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Nullable Foreign Key bad practice?
Let's say you have a table Orders with a foreign key to a Customer Id. Now, suppose you want to add an Order without a Customer Id, (whether that should be possible is another question) you would have to make the foreign key NULL... Is that bad practice or would you rather work with a link table bet...