如果是三层结构 需在BLL层中创建数字验证代码,然后调用代码如下:using System;
using SystemCollectionsGeneric;
using SystemText;
using SystemTextRegularExpressions;namespace HotelManagerBLL
{
public class RegularNumber
{
/// <summary>
/// 数字验证
/// </summary>
/// <param name="strNumber">被验证信息</param>
/// <returns></returns>
public bool IsWholeNumber(string strNumber)
{
Regex notWholePattern = new Regex(@"^[-]\d+[]\d$");
return notWholePatternIsMatch(strNumber, 0);
} }
}
i=1
do while i<305
xn=cstr(i)
for n=1 to 8-len(xn)
xn="0" & xn
next n
xn="yp" & xn
UPDATE ypzl SET 药名名称ID=' & xn & "' WHERE id < '304'
i=i+1
loop
sql server里有循环语句,在sqlserver 数据库中,while循环语句是最常用的语句之一,for指定次数用的很少。比如:
SQL循环语句
declare @i int
set @i=1
while @i<30
begin
insert into test (userid) values(@i)
set @i=@i+1
end
while 条件
begin
执行 *** 作
set @i=@i+1
end
WHILE
设置重复执行 SQL 语句或语句块的条件,只要指定的条件为真,就重复执行语句,可以使用 BREAK 和 CONTINUE 关键字在循环内部控制 WHILE 循环中语句的执行。
语法
WHILE Boolean_expression
{ sql_statement | statement_block }
[ BREAK ]
{ sql_statement | statement_block }
[ CONTINUE ]
参数
Boolean_expression
返回 TRUE 或 FALSE 的表达式。如果布尔表达式中含有 SELECT 语句,必须用圆括号将 SELECT 语句括起来。
{sql_statement | statement_block}
Transact-SQL 语句或用语句块定义的语句分组,若要定义语句块,请使用控制流关键字 BEGIN 和 END。
BREAK
不用循环,也不需要触发器。
T-SQL自己就可以搞定,这点比ORACLE的PL/SQL强大多了。
具体写法如下
update B set B字段1 = A字段1, B字段2 = A字段2 from A where aid = bid;
如果你非想写循环也可以,利用游标可以实现,不过需要2个游标
declare c_a cursor for select id from A;
declare @id int;
open c_a;
fetch next from c_a into @id;
while @@fetch_status=0
begin
declare c_b cursor for select id from B;
declare @id2 int;
open c_b;
fetch next from c-b into @id2;
while @@fetch_status=0
begin
if @id=@id2
begin
update b set 字段='具体值' where id=@id2;
end;
fetch next from c_b into @id2;
end;
close c_b;
deallocate c_b;
fetch next from c_a into @id;
end;
close c_a;
deallocate c_a;
String str2="";
for(int pno=0;pno<3;pno++){
if(pno==0){
str2="select from (select rownum rowa,d from (select sswsms_id,sswphone_number from sms_send_wait ssw left join sms_send_receive ssr on ssrsms_id = sswsms_id where not exists ( select ssrbphone_number from sms_send_receive_blacklist ssrb where ssrbphone_number=sswphone_number) and sswsend_wait_time between sysdate-1 and sysdate+1) d where rownum<=pno2) where rowa>(pno-1)2"
}else{
str2=str2+" union "+ "select from (select rownum rowa,d from (select sswsms_id,sswphone_number from sms_send_wait ssw left join sms_send_receive ssr on ssrsms_id = sswsms_id where not exists ( select ssrbphone_number from sms_send_receive_blacklist ssrb where ssrbphone_number=sswphone_number) and sswsend_wait_time between sysdate-1 and sysdate+1) d where rownum<=pno2) where rowa>(pno-1)2"
}
}
pstmt = connprepareStatement(str2);
ResultSet rs = pstmtexecuteQuery();
// 你要是想把sql语句拼起来,一次性执行了,就用上面的方法,要是不想或不会拼,可以把pstmt = connprepareStatement(str2);
ResultSet rs = pstmtexecuteQuery();
写到for循环里面,每循环一次执行一次,都可以的!
以上就是关于c#中如何在循环中处理对SQLserver数据库的修改问题全部的内容,包括:c#中如何在循环中处理对SQLserver数据库的修改问题、vb sql批量修改语句、在sql server中循环语句 for要怎么使用等相关内容解答,如果想了解更多相关内容,可以关注我们,你们的支持是我们更新的动力!
欢迎分享,转载请注明来源:内存溢出
评论列表(0条)