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How to use OpenFileDialog to select a folder?
How to use OpenFileDialog to select folders?
8 Answers
8
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How to use NULL or empty string in SQL
...
Select *
From Table
Where (col is null or col = '')
Or
Select *
From Table
Where IsNull(col, '') = ''
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How to resize a custom view programmatically?
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Whether the in value should be converted into dp value or it would work.
– Dory
Nov 20 '13 at 5:28
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How to select the nth row in a SQL database table?
I'm interested in learning some (ideally) database agnostic ways of selecting the n th row from a database table. It would also be interesting to see how this can be achieved using the native functionality of the following databases:
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Why can't I use a list as a dict key in python?
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Why not just convert the list to a tuple? Why convert it to a string? If you use a tuple, it'll work correctly with classes that have a custom comparison method __eq__. But if you convert them to strings, everything is compared by its str...
Equivalent of LIMIT and OFFSET for SQL Server?
...nation it's better to write a query like this:
;WITH Results_CTE AS
(
SELECT
Col1, Col2, ...,
ROW_NUMBER() OVER (ORDER BY SortCol1, SortCol2, ...) AS RowNum
FROM Table
WHERE <whatever>
)
SELECT *
FROM Results_CTE
WHERE RowNum >= @Offset
AND RowNum < @Offset +...
How to get 30 days prior to current date?
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As noted by @Neel, this method returns in Javascript Timestamp format. To convert it back to date object, you need to pass the above to a new Date object; new Date(priorDate).
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Get top n records for each group of grouped results
...ould need to specify the group number and add queries for each group:
(
select *
from mytable
where `group` = 1
order by age desc
LIMIT 2
)
UNION ALL
(
select *
from mytable
where `group` = 2
order by age desc
LIMIT 2
)
There are a variety of ways to do this, see this articl...
Get the current time in C
...igured it out by now, but you would use the strptime function in time.h to convert from char * to struct tm
– KingRadical
Nov 5 '13 at 19:59
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What are the differences between utf8_general_ci and utf8_unicode_ci? [duplicate]
... that gives incorrect results on general Unicode text. What it does is:
converts to Unicode normalization form D for canonical decomposition
removes any combining characters
converts to upper case
This does not work correctly on Unicode, because it does not understand Unicode casing. Unicod...