set rs=conn.execute ("select id,name,nums from tblname where name='"&varname&"'") id=Cint(rs("id")) nums=Cint(rs("nums"))+1 conn.execute ("update tblname set nums="&nums&" where id="&id)这样就把你的nums加1了,conn是一个数据库连接对象,事先要设置好
你说的很象我们做的日志系统。每次用户查看的时候就写如日志。 对于select操作没有触发器事件。所以不能用触发器。不过你可以写一个函数,在每次查询的时候调用。 同时建一胀表维护你要监视的那些表。这个表的结构为table_set(table_name,table_value) 分别表示所要监视的表的名称,和这个表被查询的当前次数。 $query="select * from t1"; $mydb->query($query); f_onselect('t1');function f_onselect($table_name) { global $sys_user,$sys_password,$sys_database,$sys_host; $conn=new DB_Sql(); $conn->Host=$sys_host; $conn->User=$sys_user; $conn->Password=$sys_password; $conn->Database=$sys_database; $conn->connect(); $query="update table_set table_value=table_value+1 where table_name=$table_name"; $conn->query($query); return 1; }
$query="select * from t1"; $mydb->query($query); f_onselect('t1');function f_onselect($table_name) { global $sys_user,$sys_password,$sys_database,$sys_host; $conn=new DB_Sql(); $conn->Host=$sys_host; $conn->User=$sys_user; $conn->Password=$sys_password; $conn->Database=$sys_database; $conn->connect(); $query="update table_set table_value=table_value+1 where table_name=$table_name"; $conn->query($query); return 1; }
phplib就是一个连接数据库的类。如下你可以通过看这写类的方法了解上面代码的意思 <?php class DB_Sql { var $Host = ""; var $Database = ""; var $User = ""; var $Password = ""; var $Link_ID = 0; var $Query_ID = 0; var $Record = array(); var $Row = 0;
var $Errno = 0; var $Error = ""; var $Auto_Free = 0; ## set this to 1 to automatically free results
function connect() { if ( 0 == $this->Link_ID ) { $this->Link_ID=mssql_pconnect($this->Host, $this->User, $this->Password); if (!$this->Link_ID) $this->halt("Link-ID == false, mssql_pconnect failed"); else mssql_select_db($this->Database, $this->Link_ID); } } function free_result(){ mssql_free_result($this->Query_ID); $this->Query_ID = 0; }
function query($Query_String) { if (!$this->Link_ID) $this->connect();
还是好人做到底吧:)触发器代码:假设表名为userinfo,id有默认值0create trigger my_trigger on userinfo after insert as begin declare @maxid as int declare @nextid as int select @maxid=max(id) from userinfo set @nextid=@maxid + 1 update userinfo set id = @nextid where id = 0 end
CREATE TRIGGER [TRIGGER NAME] ON [dbo].[news]
FOR INSERT, UPDATE, DELETE
AS
到这里我不会了,请高人指教
这样吧:
你在news表中新增一个字段,nums:integer型的,用来累计用户点击的数目每当该表中有一条记录被select出来,那么根据该记录的id,update一下该记录的nums字段,使其值加1具体的程序你自己实现吧:)
在标识栏里面选择是种子为1,其他的默认就可以了。
sqlserver里面有自动增加的数据类型。在建表的工具中加一个字段,选择数据类型为decimal
在标识栏里面选择是种子为1,其他的默认就可以了。
id=Cint(rs("id"))
nums=Cint(rs("nums"))+1
conn.execute ("update tblname set nums="&nums&" where id="&id)这样就把你的nums加1了,conn是一个数据库连接对象,事先要设置好
对于select操作没有触发器事件。所以不能用触发器。不过你可以写一个函数,在每次查询的时候调用。
同时建一胀表维护你要监视的那些表。这个表的结构为table_set(table_name,table_value)
分别表示所要监视的表的名称,和这个表被查询的当前次数。
$query="select * from t1";
$mydb->query($query);
f_onselect('t1');function f_onselect($table_name)
{
global $sys_user,$sys_password,$sys_database,$sys_host;
$conn=new DB_Sql();
$conn->Host=$sys_host;
$conn->User=$sys_user;
$conn->Password=$sys_password;
$conn->Database=$sys_database;
$conn->connect();
$query="update table_set table_value=table_value+1 where table_name=$table_name";
$conn->query($query);
return 1;
}
注意我的代码是用的phplib写的。$conn->query代表查询,
有时间还是找本书好好研究一下得好
$mydb->query($query);
f_onselect('t1');function f_onselect($table_name)
{
global $sys_user,$sys_password,$sys_database,$sys_host;
$conn=new DB_Sql();
$conn->Host=$sys_host;
$conn->User=$sys_user;
$conn->Password=$sys_password;
$conn->Database=$sys_database;
$conn->connect();
$query="update table_set table_value=table_value+1 where table_name=$table_name";
$conn->query($query);
return 1;
}
<?php
class DB_Sql {
var $Host = "";
var $Database = "";
var $User = "";
var $Password = ""; var $Link_ID = 0;
var $Query_ID = 0;
var $Record = array();
var $Row = 0;
var $Errno = 0;
var $Error = ""; var $Auto_Free = 0; ## set this to 1 to automatically free results
function connect() {
if ( 0 == $this->Link_ID ) {
$this->Link_ID=mssql_pconnect($this->Host, $this->User, $this->Password);
if (!$this->Link_ID)
$this->halt("Link-ID == false, mssql_pconnect failed");
else
mssql_select_db($this->Database, $this->Link_ID);
}
}
function free_result(){
mssql_free_result($this->Query_ID);
$this->Query_ID = 0;
}
function query($Query_String) {
if (!$this->Link_ID)
$this->connect();
# printf("<br>Debug: query = %s<br>\n", $Query_String);
$this->Query_ID = mssql_query($Query_String, $this->Link_ID);
$this->Row = 0;
if (!$this->Query_ID) {
$this->Errno = 1;
$this->Error = "General Error (The MSSQL interface cannot return detailed error messages).";
$this->halt("Invalid SQL: ".$Query_String);
}
return $this->Query_ID;
}
function next_record() {
if ($this->Record = mssql_fetch_row($this->Query_ID)) {
// add to Record[<key>]
$count = mssql_num_fields($this->Query_ID);
for ($i=0; $i<$count; $i++){
$fieldinfo = mssql_fetch_field($this->Query_ID,$i);
$this->Record[strtolower($fieldinfo->name)] = $this->Record[$i];
}
$this->Row += 1;
$stat = 1;
} else {
if ($this->Auto_Free) {
$this->free_result();
}
$stat = 0;
}
return $stat;
}
function seek($pos) {
mssql_data_seek($this->Query_ID,$pos);
$this->Row = $pos;
} function metadata($table) {
$count = 0;
$id = 0;
$res = array(); $this->connect();
$id = mssql_query("select * from $table", $this->Link_ID);
if (!$id) {
$this->Errno = 1;
$this->Error = "General Error (The MSSQL interface cannot return detailed error messages).";
$this->halt("Metadata query failed.");
}
$count = mssql_num_fields($id);
for ($i=0; $i<$count; $i++) {
$info = mssql_fetch_field($id, $i);
$res[$i]["table"] = $table;
$res[$i]["name"] = $info["name"];
$res[$i]["len"] = $info["max_length"];
$res[$i]["flags"] = $info["numeric"];
}
$this->free_result();
return $res;
}
function affected_rows() {
return mssql_affected_rows($this->Query_ID);
}
function num_rows() {
return mssql_num_rows($this->Query_ID);
}
function num_fields() {
return mssql_num_fields($this->Query_ID);
}
function nf() {
return $this->num_rows();
}
function np() {
print $this->num_rows();
}
function f($Field_Name) {
return $this->Record[strtolower($Field_Name)];
}
function p($Field_Name) {
print $this->f($Field_Name);
}
function halt($msg) {
printf("</td></tr></table><b>Database error:</b> %s<br>\n", $msg);
printf("<b>MSSQL Error</b>: %s (%s)<br>\n",
$this->Errno,
$this->Error);
die("Session halted.");
}
}
?>
时候触发,并给你要求的那个字段设置默认值,比如0。然后每一次INSERT
都会增加一个该字段为0的行。
触发器里面先读取该字段最大值,然后将这个值加一以后UPDATE到该字段为
0的那一行里面。代码我就不写了:)
after insert
as
begin
declare @maxid as int
declare @nextid as int
select @maxid=max(id) from userinfo
set @nextid=@maxid + 1
update userinfo set id = @nextid where id = 0
end