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How to drop a table if it exists?
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Is it correct to do the following?
IF EXISTS(SELECT *
FROM dbo.Scores)
DROP TABLE dbo.Scores
No. That will drop the table only if it contains any rows (and will raise an error if the table does not exist).
Instead, for a permanent table you can use
I...
efficient way to implement paging
...inq (with SQL 2005 / 2008 as database server) your query will be using the Select ROW_NUMBER() Over ... statement, with is somehow direct paging in the SQL engine.
Giving you an example, I have a db table called mtcity and I wrote the following query (work as well with linq to entities):
using (Da...
Remove duplicates in the list using linq
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var distinctItems = items.GroupBy(x => x.Id).Select(y => y.First());
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Escape quote in web.config connection string
...ng Property):
To include values that contain a semicolon, single-quote character, or double-quote character, the value must be enclosed in double quotation marks. If the value contains both a semicolon and a double-quote character, the value can be enclosed in single quotation marks.
So:
conn...
Get Insert Statement for existing row in MySQL
... See this if you get the error mysqldump: Couldn't execute 'SELECT @@GTID_MODE': Unknown system variable 'GTID_MODE' (1193) gist.github.com/arun057/5556563
– Daniel Schaffer
Jul 12 '13 at 22:39
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Filter element based on .data() key/value
...class .navlink , which, when clicked, use .data() to set a key called 'selected' , to a value of true :
5 Answers
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How do I use Linq to obtain a unique list of properties from a list of objects?
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IEnumerable<int> ids = list.Select(x=>x.ID).Distinct();
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Can multiple different HTML elements have the same ID if they're different elements?
...into problems being able to work with these elements from JS, pass them as selectors to libraries/APIs/Flash, etc.
– mrooney
May 13 '13 at 20:55
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Is it possible to style a select box? [closed]
I've got an HTML select box that I need to style. I'd prefer to use just CSS but if I have to I'll use jQuery to fill in the gaps.
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Read data from SqlDataReader
...you use indexes like reader.GetString(0) will it use the first column you selected in your query or the firstt column on the table. I have a table with 3 columns in order: ID, Dir, Email. My command selects dir and email. Will reader.GetStrting(0) retrieve dir or ID? Are the indexes based off t...