microsoft returns

But in most cases, we want it to return 0 instead of NULL if the condition record is not met, so we can use the following method, for example:SELECT COALESCE (SUM(isnull(filed,00as[filed1] from table1Okay, so you don't have to bother with the case of whether the return result is null.The COALESCE function means returning the first empty value in the argument list, which allows multiple arguments to be passed in, which is also a standard function in SQL.There are no qualifying records, and the SU

. adddays (-6 );Tuesdaytime = datetime. Today. adddays (-5 );Wednesdaytime = datetime. Today. adddays (-4 );Thursdaytime = datetime. Today. adddays (-3 );Fridaytime = datetime. Today. adddays (-2 );Saturdaytime = datetime. Today. adddays (-1 );Sundaytime = datetime. today;Break;} There is a time field in the table. This field is used to obtain records within one day. It mainly uses the datediff function of SQL: returns the number of days between two d

Jquery returns the base case results, while jquery returns the case Case study of Jquery + ajax Implementation of partial refresh Take adding a user as an example. This is part of the jsp code.PageEncoding = "UTF-8" %>Href = "$ {pageContext. request. contextPath}/common/css/plantform/common.css"Type = "text/css"/>Href = "$ {pageContext. request. contextPath}/common/css/plantform/list.css"Rel = "stylesheet

[Code note] the ID card number returns gender, and the ID card number returns gender I. Code. -(Void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view. NSString * sex = [self sexStrFromIdentityCard: @ "139876456767892345"]; NSLog (@ "-- sex -- % @", sex );} // gender returned by the ID card number-(NSString *) sexStrFromIdentityCard :( NSString *) numberStr {NSString * res

Javascript returns the top source code, and javascript returns the top code. Implementation 2: # Scrolltop {Visibility: hidden;Position: fixed;Bottom: 100px;Display: block;Margin:-30px 0 0 2px;Width: 40px;Background: # f4f4f4;Border: 1px # cdcdcd solid;Border-radius: 3px;Border-top: 0;Cursor: pointer;}# Scrolltop: hover {Text-decoration: none;}. Ie6 # scrolltop {Position: absolute;Bottom: auto;}# Scrolltop

Mssql returns the table creation statement. mssql returns the creation statement. If OBJECT_ID ('SP _ create_table_ SQL ', 'P') is not nullddrop proc sp_create_table_sqlgocreate proc sp_create_table_ SQL (@ tablename varchar (255 )) as begin -- exec sp_create_table_ SQL 'ad _ adgroup' -- 0. hong En-1. indexes of non-primary key classes are not supported -- 2. non-default sorting of the primary/secondary key

Spring MVC returns the json format. springmvc returns the json format. When SpringMVC framework is used to directly return json data to the client, different versions may vary. The following describes how to configure two types of versions. Note: Both methods have been verified. 1. Spring3.1.x 1.1 dispatcher-servlet.xml configuration file is as follows: Xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instanc

Jquery returns the top result. jquery returns the top result. JQuery ("# gotop" ).css ('display', 'None'); jQuery (window ). scroll (function () {if (jQuery (this ). scrollTop () gt; 100) {jQuery ("# gotop "). fadeIn (1000)} else {jQuery ("# gotop "). fadeOut (750)}); jQuery ("# gotop "). click (function () {jQuery ("html, body "). animate ({scrollTop: 0}, 300); return false }) Slide to a certain distanc

GetResponseStream throws an exception, the exception hint is badrequest.To get 400 of the information returned, you need to do special handling of the catch section.To add a catch code:1 using(WebResponse response =e.response)2 {3HttpWebResponse HttpResponse =(HttpWebResponse) response;4 using(Stream data =Response. GetResponseStream ())5 using(varReader =NewStreamReader (data))6 {7

the program indefinitely{Char *s=new char[100];Char *t=new char[50];coutGets (s); //The acquired string is stored in the character pointercoutGets (t); //The acquired string is stored in the character pointerint N=index (S,T);if (n==-1)coutElsecout}}The result of the final program operation:You can see the effect is good, whether it is a word or a string, both meet the requirements.Writes the function int index (char *s,char * t) in the C + + language, retu