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MySQL how to join tables on two fields
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SELECT *
FROM t1
JOIN t2 USING (id, date)
perhaps you'll need to use INNEER JOIN or
where t2.id is not null
if you want results only matching both conditions
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Where to find Java JDK Source Code? [closed]
...leases this zip was missing but again it is available.
make sure that you select source as well from installation wizard.
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Inheriting constructors
... constructors, if you write this, you inherit all of them. To inherit only selected ones you need to write the individual constructors manually and call the base constructor as needed from them.
Historically constructors could not be inherited in the C++03 standard. You needed to inherit them manua...
Determining the last changelist synced to in Perforce
...number (in the highest row).
Make sure that in the Workspace Tree you have selected the same folder as previously in the Dashboard. Then go to the History tab (View->History) and scroll down to the number noted previously. The number just below that number is the number of your current changelist...
Mark parameters as NOT nullable in C#/.NET?
... where o.Value == null
select o;
bool paramsNull = nullParams.Count() > 0;
if (paramsNull)
{
StringBuilder sb = new StringBuilder();
foreach (var param in nullParams)
...
Getting only response header from HTTP POST using curl
...when you actually want to POST some data. Curl says: Warning: You can only select one HTTP request method! You asked for both POST Warning: (-d, --data) and HEAD (-I, --head).
– SebastianH
Dec 1 '16 at 18:15
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Excel to CSV with UTF8 encoding [closed]
... remember correctly. I have a file is 700M
– News_is_Selection_Bias
Jul 26 '16 at 4:30
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PHP random string generator
...keyspace A string of all possible characters
* to select from
* @return string
*/
function random_str(
int $length = 64,
string $keyspace = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
): string {
if ($length < 1) {
throw new \Ran...
Secret copy to clipboard JavaScript function in Chrome and Firefox?
... function(obj, panelName) // no web page interaction
{
Firebug.chrome.select(obj, panelName);
};
this.keys = function(o)
{
return FBL.keys(o); // the object is from the page, unwrapped
};
this.values = function(o)
{
return FBL.values(o); // the object is from the page, unwrapped
};
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How can I comment a single line in XML?
... parser you are using. Personally, I use an IDE (oXygen) that allows me to select a piece of XML text, right click, and ask to comment it out. Which seems a lot easier than your technique.
– Michael Kay
Jun 28 '13 at 16:54
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