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Insert Update stored proc on SQL Server
...in the case mentioned above we are removing one
additional read from the table if we
use the UPSERT instead of EXISTS.
Unfortunately for an Insert, both the
UPSERT and IF EXISTS methods use the
same number of reads on the table.
Therefore the check for existence
should only be done whe...
Replacement for “rename” in dplyr
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does rename work by reference like setnames from data.table package
– MySchizoBuddy
Sep 4 '15 at 0:11
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Why switch is faster than if
...h switch the JVM loads the value to compare and iterates through the value table to find a match, which is faster in most cases.
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cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术
... 15 CMOV Conditional Move Instruction
16 PAT Page Attribute Table
17 PSE-36 36-bit Page Size Extension
18 PSN Processor serial number is present and enabled
19 CLFSH CLFLUSH Instruction
20 Reserved
21 DS Debug Store
22 ACPI Thermal...
Using a .php file to generate a MySQL dump
... or less are auto-explicative:
$dumpSettingsDefault = array(
'include-tables' => array(),
'exclude-tables' => array(),
'compress' => 'None',
'no-data' => false,
'add-drop-database' => false,
'add-drop-table' => false,
'single-transaction' => true,
...
WiX tricks and tips
... to post-process the generated MSI to change the X,Y fields in the Control table for that particular CheckBox control. The javascript code looks like this:
var msiOpenDatabaseModeTransact = 1;
var filespec = WScript.Arguments(0);
var installer = new ActiveXObject("WindowsInstaller.Installer");
va...
How to get a complete list of ticker symbols from Yahoo Finance? [closed]
...have changed (redirects to finance.yahoo.com/q) and no longer contains the table the XPath suggests.
– richardr
May 4 '14 at 0:14
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Most underused data visualization [closed]
...d.date <- Sys.Date()
quote <- paste("http://ichart.finance.yahoo.com/table.csv?s=",
stock, "&a=", substr(start.date,6,7),
"&b=", substr(start.date, 9, 10),
"&c=", substr(start.date, 1,4),
"&d=", substr(end.date,6,...
Pure virtual function with implementation
...ual methods inside the constructor). I guess it has to do with the virtual table coherency, which might not be prepared to route to the body of the correct implementation.
– teodron
May 18 '17 at 7:47
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How to use DISTINCT and ORDER BY in same SELECT statement?
..., such as Order, event, etc. so if you have (for example) a column in your table called Event you can write [Event] instead of Event to stop SQL throwing a parse error.
– Ben Maxfield
Oct 24 '16 at 21:26
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