what default value

1. If no default value is set:Copy codeThe Code is as follows:SELECT userinfo. id, user_name, role, adm_regionid, region_name, create_timeFROM userinfoLeft join region ON userinfo. adm_regionid = region. idResult: Set display default value: Copy

Example of how to specify the default value for a php function Php function specifies the default value -bbs.it-home.org Function printMe ($ param = NULL) { Print $ param; }

boss feel convenient a lot, but purchasing department buyer a Hai but still a little opinion, he ran to find Xiaoming. Hai: Now the application is I submit, the applicant and the application department can not be filled every time ah, good

Just see a lot of xx.backgroundcolor in the code = [Uicolor Clearcolor];(1) Curious, what value is the default background color?Official: Nil is the default, and the background is transparent. Then Clearcolor's note also stated: "0.0 white, 0.0

How to update without changing the time when using Current_timestamp as the default value There is a field datetime is a timestamp type, using Current_timestamp as the default value When update does not modify this datetime field, the time becomes

The default value here refers to external data, such as querystring, 1. Train of Thought. Javascript gets the value passed by querystring, Of course, you can write it by yourself, Provided by init. js under SharePoint layoutsGeturlkeyvalue VaR

ReferenceError: Error #1069: The property label cannot be found on spark. components. RadioButtonGroup, and no default value exists, 1. Error description ReferenceError: Error #1069: The property label cannot be found on spark. components.

ASP. net mvc allows @ Html. DropDownList to display the default value, @ Html. during the DropDownList process, it is found that its usage is very limited. For example, when loading, display the Set Default item or adjust its display style, I

About the dropdownlist control in Asp.net, after it is selected, it is restored to the default value after the page is sent back.   There are two types of problems.   1. In the form loading, We do not judge the return. We only need to add   If

Using system; Using system. Collections. Generic; Using system. LINQ; Using system. text; Namespace generic { // Generic features: 1 default value Class generic features { Public static void main () { Documentmanager Manager = new

There are a lot of fileupload on the web, the most useful is the official doc inside the sample.But in real business. The change function may be used. At this point, you need to assign an initial value to the input box when you open it.How to give

What is the default value for the TTL? Different operating system, its TTL value is not the same. Here to talk about some common operating system default TTL values, by default, the Linux system TTL value of 64 or 255,windows NT/2000/XP system TTL

For normal text input boxes, you can assign a default value using the following method:ID= "TextBox1" runat= "Server">12345 asp:textbox>When you change the input box type to a password, the Password box on the page is always blank and the default

The example of this article describes the method of adding the default value of YII implementation model. Share to everyone for your reference, specific as follows: Yii model inherits from Cactiverecord Some fields may not appear in the form, but

The content of this section:PHP functions Specify default valuesIn PHP programming, a default value is set for a custom function, and when the user calls the function, the parameter is replaced with the default value if the parameter is not assigned

Example 1 Copy Code code as follows: The php function specifies the default value-www.jb51.net function Printme ($param = NULL) { Print $param; } Printme ("This is Test"); Printme (); ?>

A handy use of PHP is to set a default value for the parameter when defining the function, such as: Copy Code code as follows: function Simue ($a =1, $b =2) { return $a + $b; } Echo Simue (); Output 3 Echo Simue (10); Output 12 echo

This error occurred while building the table:ERROR 1067 (42000): Invalid default value for ' Last_login ' Workaround:Two steps:S1. Mysql> Show variables like ' Sql_mode '; +---------------+-------------------------------------------------------------

In the development of the small details found, before using the ValidForm verification date input box must be filled, and later found to meet the following conditions can be fulfilled is required, the conditions are as follows: 1. The date has a

Phenomenon:mysql5.7 after the version datetime default setting ' 0000-00-00 ', an exception occurred: Invalid default value for ' Create_time 'Reason:mysql5.7 later version of the Sql_mode default use: (Win system See My.ini in about 70 lines)