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mysql update column with value from another table
... UPDATE participants_registrations INNER JOIN participants ON participants.id = participants_registrations.participantId INNER JOIN registrations ON registrations.id = participants_registrations.registrationId LEFT JOIN groups ON (groups.id = registrations.groupId) SET registrations.groupId = g...
How do you pass arguments to define_method?
...ethod at runtime that takes optional args and a block and still be able to call the original method with the args and block. Ah, ruby. Specifically, I needed to overwrite Savon::Client.request in my dev env for a single API call to a host I can access only in production. Cheers!
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Populate data table from data reader
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Please check the below code. Automatically it will convert as DataTable
private void ConvertDataReaderToTableManually()
{
SqlConnection conn = null;
try
{
string connString = ConfigurationManager.ConnectionStrings["Northw...
python list in sql query as parameter
....join(placeholder for unused in l)
query= 'SELECT name FROM students WHERE id IN (%s)' % placeholders
cursor.execute(query, l)
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reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?
...Data ) is refreshed once in a while and I do it by creating another object called newData and fill it's data structures with new data. When it's done I just assign
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How to set initial value and auto increment in MySQL?
How do I set the initial value for an "id" column in a MySQL table that start from 1001?
10 Answers
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SQL Server insert if not exists best practice
...k or so? (remember this only takes a few seconds)
– Didier Levy
Mar 14 '11 at 12:35
3
@Didier Lev...
Difference between left join and right join in SQL Server [duplicate]
...ed completely interchangeable. Try however Table2 left join Table1 (or its identical pair, Table1 right join Table2) to see a difference. This query should give you more rows, since Table2 contains a row with an id which is not present in Table1.
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What's the difference between hard and soft floating point numbers?
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This is the right answer. The calling conversion for floats needs to match between your code and libc. It might still work with a mismatch, if you never never call any floating point libc functions.
– Tor Klingberg
A...
HTML entity for the middle dot
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It's called a middle dot: ·
HTML entities:
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In CSS:
\00B7
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