我遇到了一个SQL无法解决的愚蠢问题.
ALTER TABLE `news` ADD `dateAdded` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP AUTO_INCREMENT , ADD PRIMARY KEY ( `dateAdded` )
错误:
(#1067)Invalid default value for 'dateAdded'
有人能帮助我吗？
当我尝试编译时,我收到此错误:
1>------ Build started: Project: snake, Configuration: Debug Win32 ------ 1> exercise.cpp 1>c:\users\robin\documents\visual studio 2010\projects\snake\snake\exercise.cpp(13): error C2059: syntax error : '>=' 1>c:\users\robin\documents\visual studio 2010\projects\snake\snake\exercise.cpp(16): error C2059: syntax error : '>=' 1>c:\users\robin\documents\visual studio 2010\projects\snake\snake\exercise.cpp(19): error C2059: syntax error : '>=' 1>c:\users\robin\documents\visual studio 2010\projects\snake\snake\exercise.cpp(22): error C2059: syntax error : '>=' 1>c:\users\robin\documents\visual studio 2010\projects\snake\snake\exercise.cpp(25): error C2059: syntax error : '>' 1>c:\users\robin\documents\visual studio 2010\projects\snake\snake\exercise.cpp(28): error C2059: syntax error : '==' 1>c:\users\robin\documents\visual …
我想为以下代码创建类型别名：
type Foo = {alpha: string} | {beta: string}
我想创建一个类型，如下所示，我将上面的类型定义为Foo<'alpha' | 'beta', string>
type Foo<K, T> = ...
记录不是一个选项，因为以下内容为真：
Record<'alpha' | 'beta', string> === {
alpha: string;
beta: string;
}
<?php
//Sessions starten
session_start();
//Include stuff
include('conf.php');
//'Shortcuts' maken
$sname = $site['name'];
$shost = $site['host'];
$shostb = $site['hostb'];
//Verbinding maken met DB
$link = mysql_connect($database['host'], $database['username'], $database['password']) or die (mysql_error());
mysql_select_db($database['db'],$link) or die(mysql_error());
//Gegevens uit db halen
if(isset($_GET['page'])){
$page['title'] = mysql_query("SELECT title FROM pages WHERE page = $_GET[page]");
}
else{
$page['title'] = mysql_query("SELECT title FROM pages WHERE page = 'index.php'");
}
?>
<!doctype html>
<html lang="nl">
<head>
<meta charset="utf-8" />
<title><?php echo $sname;?>•<?php echo $page['title']?></title>
有人知道为什么这不起作用？我的数据库结构是:
页面|标题
index.php文件|指数
对不起,但我不明白这一点.该变种转储 …