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Differences between INDEX, PRIMARY, UNIQUE, FULLTEXT in MySQL?
...e - which are typically implemented internally using b-trees (allowing for selecting, sorting or ranges starting from left most column) or hash tables (allowing for selection starting from left most column).
Where the other index types are general-purpose, a FULLTEXT index is specialised, in that it...
Apache: “AuthType not set!” 500 Error
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In OS X MAMP apache 2.2, change from "Require all granted" to Satisfy Any
– Matilda Yi Pan
May 22 '16 at 23:40
add a comment
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Insert auto increment primary key to existing table
...etrieve it by id immediately, MySQL offers LAST_INSERT_ID() for that value SELECT * FROM table_name WHERE id = LAST_INSERT_ID() and most programming language APIs offer some function/method to return that value in the application code.
– Michael Berkowski
Jan 2...
Git Checkout warning: unable to unlink files, permission denied
... usually see that kind of error when there is a process not releasing the handle of those files.
Make sure nothing is running, and then try your checkout again.
Note: it can also be related with the way Git has been installed (on Windows, UAC can generate problem if msysgit is installed in C:\Prog...
Embed git commit hash in a .Net dll
...the steps:
Use a Build Event to call git
Right-click on the project and select Properties
In Build Events, add Pre-Build event containing (notice the quotes):
"C:\Program Files\Git\bin\git.exe" describe --long > "$(ProjectDir)\version.txt"
That will create a version.txt file in your project...
MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...
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pt-table-checksum校验数据一致性。
从库mysql操作
GRANT SELECT,PROCESS, SUPER, REPLICATION SLAVE ON *.* TO 'checksums'@'192.168.1.100' IDENTIFIED BY 'slavecheck'; flush privileges;
主库mysql操作
GRANT SELECT, PROCESS, SUPER, REPLICATION SLAVE ON *.* TO 'checksums'@'19...
MySQL integer field is returned as string in PHP
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When you select data from a MySQL database using PHP the datatype will always be converted to a string. You can convert it back to an integer using the following code:
$id = (int) $row['userid'];
Or by using the function intval():
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Create directories using make file
...ck with the basic rules. :). Thank you for guiding. And i'm running "make" from toplevel directory only.
– Jabez
Dec 23 '09 at 6:49
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How to select an element with 2 classes [duplicate]
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You can chain class selectors without a space between them:
.a.b {
color: #666;
}
Note that, if it matters to you, IE6 treats .a.b as .b, so in that browser both div.a.b and div.b will have gray text. See this answer for a comparison bet...
How to update a menu item shown in the ActionBar?
... set a condition in oncreateOptionMenu().
For example:
Boolean mISQuizItemSelected = false;
/**
* Called to inflate the action bar menus
*
* @param menu
* the menu
*
* @return true, if successful
*/
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu ite...