在您的会计软件中,您将如何为COA设计帐户数据库
设计1)1个账户只能容纳1种货币
设计2)1个账户可以持有多种货币,只需按CurrencyId(美元,英镑等)过滤交易.
设计1)1个账户只能容纳1种货币
ACCOUNT
Id
AccountNumber
CurrencyCode
...
TRANSACTION
Id
AccountId
Amount
...
设计2)1个账户可以持有多种货币
ACCOUNT
Id
AccountNumber
...
TRANSACTION
Id
AccountId
Amount
CurrencyCode
....
SELECT current_raised,segment FROM gizmos
where created_at >= "2012-03-01"
返回600多行
SELECT "current_raised","segment"
UNION
(SELECT current_raised,segment FROM gizmos
where created_at >= "2012-03-01")
返回180行
为什么会这样？
我有以下表格：
内容: content_id, user_id, post_date
评论：comment_id、user_id、comment_date
如何获得按月和年分组的活跃唯一用户数？活跃意味着用户在该给定月份发布或评论。
这个sqlfiddle链接似乎在调用期间保持状态:http://sqlfiddle.com/#!2/125bc/1
它包含mysql的这个模式:
CREATE TABLE if not exists `standings` (
`teamid` int(11) NOT NULL,
`win` decimal(23,0) default NULL,
`tie` decimal(23,0) default NULL,
`lose` decimal(23,0) default NULL,
PRIMARY KEY (`teamid`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
INSERT INTO `standings` (`teamid`, `win`, `tie`, `lose`) VALUES
(1, 3, 0, 0),
(2, 1, 1, 1),
(3, 1, 1, 1),
(4, 0, 0, 3);
CREATE TABLE if not exists `newscores` (
`recordid` int(11) NOT NULL auto_increment,
`teamid` int(11) NOT NULL,
`gameid` int(11) NOT NULL,
`totalstrokes` int(11) …我正在使用HtmlUnitDriver,这是我的代码.
HtmlUnitDriver driver = new HtmlUnitDriver(true);
driver.get("some url here");
我得到以下例外:
Caused by: com.gargoylesoftware.htmlunit.ScriptException: Wrapped com.gargoylesoftware.htmlunit.ScriptException: SyntaxError: missing ; before statement (http://sales.liveperson.net/hcp/html/mTag.js?site=7824460#1(eval)#1)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:595)
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:537)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:538)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.callFunction(JavaScriptEngine.java:545)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.callFunction(JavaScriptEngine.java:520)
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeJavaScriptFunctionIfPossible(HtmlPage.java:896)
at com.gargoylesoftware.htmlunit.javascript.host.EventListenersContainer.executeEventListeners(EventListenersContainer.java:162)
at com.gargoylesoftware.htmlunit.javascript.host.EventListenersContainer.executeBubblingListeners(EventListenersContainer.java:221)
at com.gargoylesoftware.htmlunit.javascript.host.Node.fireEvent(Node.java:735)
at com.gargoylesoftware.htmlunit.html.HtmlElement$2.run(HtmlElement.java:866)
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:537)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:538)
at com.gargoylesoftware.htmlunit.html.HtmlElement.fireEvent(HtmlElement.java:871)
at com.gargoylesoftware.htmlunit.html.HtmlPage.executeEventHandlersIfNeeded(HtmlPage.java:1162)
at com.gargoylesoftware.htmlunit.html.HtmlPage.initialize(HtmlPage.java:202)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:440)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:311)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:373)
at org.openqa.selenium.htmlunit.HtmlUnitDriver.get(HtmlUnitDriver.java:346)
... 8 more
请帮我解决这个问题.
我想使用备份MySQL数据库,ProcessBuilder并且>没有像我预期的那样解释字符.这是我的代码:
java.util.List<String> cmd = new java.util.ArrayList<>();
cmd.add("mysqldump");
cmd.add("-u");
cmd.add("root");
cmd.add("-p"+password);
cmd.add("DBx");
cmd.add(">");
cmd.add("DBbk.sql");
ProcessBuilder pb = new ProcessBuilder(cmd);
pb.directory(new File("."));
Process p = pb.start();
p.waitFor();
BufferedReader err = new BufferedReader(new InputStreamReader(p.getErrorStream()));
while((line = err.readLine()) != null) {
System.out.println(line);
}
输出是:
Warning: Using a password on the command line interface can be insecure. mysqldump: Couldn't find table: ">"
protected void Button2_Click(object sender, EventArgs e) {
//string vv;
//vv = (string)Session["FID"];
DateTime sdt = DateTime.Today;
SqlConnection cn1 = new SqlConnection();
SqlCommand cmd4 = new SqlCommand();
cn1.ConnectionString = @"Data Source=BOPSERVER;Initial Catalog=Project;Integrated Security=True";
String test = DateTime.Now.ToString("dd.MM.yyy");
for (int i = 0; i <= GridView1.Rows.Count - 1; i++) {
string toemail = GridView1.Rows[i].Cells[2].Text;
string FID1 = GridView1.Rows[i].Cells[0].Text;
GridViewRow row = GridView1.Rows[i];
CheckBox Ckbox = (CheckBox)row.FindControl("CheckBoxMark1");
if (Ckbox.Checked == true) {
sendMail(toemail);
//ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Email send Succesfully')</script>");
ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Email …作为我测试的一部分,系统应该查明用于打开网站的设备是移动设备还是普通桌面.
我一直收到错误:
"InvalidSelectorError:无法找到带有xpath表达式的元素//*[contains(@class,is-mobile ..."
萤火虫的财产:
<body class="login-page is-desktop">
我的测试:
public class isMobile {
public static boolean isMobile = false;
public static boolean checkIfMobile(WebDriver driver) throws Exception {
List<WebElement> list = driver.findElements(By
.xpath("//body[contains(@class, 'is-mobile'"));
if (list == null) {
return false;
} else {
return true;
}
}
}
有人可以告诉我正确的XPath应该如何？
当我进行查询时,我可以进行密码检查和密码,它可以工作.然而,当我尝试提取名为id的行id时,它应该是其他东西时返回0.当我以相同的方式打印密码时,它打印两个数字而不是我希望的字符串.
我或多或少是PHP的初学者,但也许有人可以看到我的代码有什么问题？
$sql = 'SELECT pass FROM tbl_user WHERE email = "'.$email.'" LIMIT 1 ;';
$selection = mysql_query($sql);
$r = mysql_fetch_assoc($selection);
$user_id = $r['id'];
print "user id is: " + $r['id'];
print "user id is: " + $r['pass'];
我正在通过BitmapFactory加载一个jpeg文件并尝试再次保存(后来我想在再次保存之前对像素数据进行一些计算).
但是,如果我试图保存它
FileOutputStream fos = new FileOutputStream(new File("/sdcard/test.jpg"));
originalImage.compress(Bitmap.CompressFormat.JPEG, 100, fos);
然后它与原始图片中的结果不完全相同.某些像素具有不同的颜色值,这对我以后的计算没有用.
有可能安全无损吗？或者当我加载图片时问题已经存在
Bitmap originalImage = BitmapFactory.decodeFile("/sdcard/input.jpg");
前几行？
我有一个名为"emp"的表,其中包含以下数据:
id name status
1 x 0
2 y 1
3 z 0
4 p 1
如何编写查询以在单个查询中将状态0更改为1并将1更改为0？