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Checking oracle sid and database name
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I presume SELECT user FROM dual; should give you the current user
and SELECT sys_context('userenv','instance_name') FROM dual; the name of the instance
I believe you can get SID as SELECT sys_context('USERENV', 'SID') FROM DUAL;
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'IF' in 'SELECT' statement - choose output value based on column values
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SELECT id,
IF(type = 'P', amount, amount * -1) as amount
FROM report
See http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html.
Additionally, you could handle when the condition is null. In the case of...
Fastest way to determine if an integer is between two integers (inclusive) with known sets of values
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int inBetween2{ 0 };
for (int i = 1; i < MaxNum; ++i)
{
if (static_cast<unsigned>(num - randVec[i - 1]) <= (randVec[i] - randVec[i - 1]))
++inBetween2;
}
Pay attention that randVec is a sorted vector. For any size of MaxNum the first method beats the second one on my machi...
Store query result in a variable using in PL/pgSQL
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I think you're looking for SELECT INTO:
select test_table.name into name from test_table where id = x;
That will pull the name from test_table where id is your function's argument and leave it in the name variable. Don't leave out the table name pre...
How to Programmatically Add Views to Views
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As a coding practice, on findViewById, cast to ViewGroup or always the most generic form of an object so that if it changes from a LinearLayout to a RelativeLayout, you have no refactoring.
– Joel Teply
Apr 3 '15 at 16:59
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Forward declaring an enum in C++
...ifferent sizes, but I'm fairly sure that data pointers have to round-trip (cast to another data pointer type, then back to the original, need to still work), which implies that all data pointers are the same size.
– Ben Voigt
Mar 9 '10 at 4:53
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How to convert a Base64 string into a Bitmap image to show it in a ImageView?
... to you from API is Base64 Encoded and should be decoded first in order to cast it to a Bitmap object!
-Take a look at your Base64 encoded String, If it starts with
data:image/jpg;base64
The Base64.decode won't be able to decode it, So it has to be removed from your encoded String:
final Str...
How do I compare two files using Eclipse? Is there any option provided by Eclipse?
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To compare two files in Eclipse, first select them in the Project Explorer / Package Explorer / Navigator with control-click. Now right-click on one of the files, and the following context menu will appear. Select Compare With / Each Other.
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How to get label of select option with jQuery?
The value can be retrieved by $select.val() .
11 Answers
11
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Select row with most recent date per user
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Query:
SQLFIDDLEExample
SELECT t1.*
FROM lms_attendance t1
WHERE t1.time = (SELECT MAX(t2.time)
FROM lms_attendance t2
WHERE t2.user = t1.user)
Result:
| ID | USER | TIME | IO |
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