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MySQL: Invalid use of group function
..., not WHERE.
The difference is: the WHERE clause filters which rows MySQL selects. Then MySQL groups the rows together and aggregates the numbers for your COUNT function.
HAVING is like WHERE, only it happens after the COUNT value has been computed, so it'll work as you expect. Rewrite your subque...
Similar to jQuery .closest() but traversing descendants?
...
These examples all select depth-first descendants, not breadth-first, so these can't be used to solve the original question. In my testing they all returned the first span, not the second.
– JrBaconCheez
M...
Making the Android emulator run faster
...ve to properly shut down your emulator device (hold the power button, then select Power off) to avoid having errors when you start it the next time (I could just close the ARM emulator, but with the Intel emulator, just closing seems to create problems).
– ADTC
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I want to use CASE statement to update some records in sql server 2005
...e values are not permitted and your update may create them. For example:
SELECT
[Id]
,[QueueId]
,[BaseDimensionId]
,[ElastomerTypeId]
,CASE [CycleId]
WHEN 29 THEN 44
WHEN 30 THEN 43
WHEN 31 THEN 43
WHEN 101 THEN 41
WHEN 102 THEN 43
...
Get button click inside UITableViewCell
... action for your button as below:
[cell.yourbutton addTarget:self action:@selector(yourButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
3) Code actions based on index as below in ViewControler:
-(void)yourButtonClicked:(UIButton*)sender
{
if (sender.tag == 0)
{
...
Is there a way to suppress warnings in Xcode?
... Easy way to get the warning code: go to the Log Navigator (Command+7), select the topmost build, expand the log (the '=' button on the right), and scroll to the bottom.
– Neal Ehardt
Jan 25 '12 at 16:46
...
Hidden features of Perl?
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One of my favourite features in Perl is using the boolean || operator to select between a set of choices.
$x = $a || $b;
# $x = $a, if $a is true.
# $x = $b, otherwise
This means one can write:
$x = $a || $b || $c || 0;
to take the first true value from $a, $b, and $c, or a default of 0...
Procedure expects parameter which was not supplied
... data tab [beside layout and Preview tabs] next to the name of the dataset selected, there is another drop down control that lets you change the CommandType. Enjoy!
– SarjanWebDev
Aug 14 '12 at 6:17
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Tricks to manage the available memory in an R session
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I make aggressive use of the subset parameter with selection of only the required variables when passing dataframes to the data= argument of regression functions. It does result in some errors if I forget to add variables to both the formula and the select= vector, but it sti...
How to remove unused imports from Eclipse
...rences → Java → Editor → Save Actions.
Check the option "Perform the selected actions on save".
Check the option "Organize imports".
Now every time you save your classes, eclipse will take care of removing the unused imports.
...