Mysql trigger Database Data Synchronization Method

Last Update:2013-11-17 Source: Internet

Author: User

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Mysql tutorial trigger database tutorial Data Synchronization Method

Function res (){
Document. getElementById ("tab2"). value = "pre _" + document. getElementById ("tab1"). value;
}
</Script>
</Head>

<Body>
<Form action = "#" method = "post" name = "form1" target = "_ blank" id = "form1">
Database Name
<Input name = "dbTbaleName" type = "text" id = "dbTbaleName" value = "dbname"/>
<Br>
Driver table
<Input name = "tab1" type = "text" id = "tab1"/> <br>
Triggered table
<Input name = "tab2" type = "text" id = "tab2"/> <br>
<Input type = "submit" name = "Submit" value = "submit"/> <br>
</Form>
<? Php tutorial
/**
* ------------------- Document comment ------------------------------------------
* Author * da * QQ 85089479 * email qianshuei@163.com *
* Creation time * 2006-012 -*
* Function Description * Data Synchronization trigger generation tool *
* Last modification time * 2006-12 -*
*-------------------------------------------------------------------
*/
$ DbName = "localhost"; // host name
$ DbUserName = "root"; // User Name
$ Dbpassword = "admin"; // Password
$ DbTbaleName = $ _ POST ['dbtbalename']; // Database Name
$ Tab1 = $ _ POST ['tab1']; // executed table
$ Tab2 = $ _ POST ['tab2']; // triggered table
$ Conn = mysql_connect ($ dbName, $ dbUserName, $ dbpassword) or die ("check your host name database username and password ");
Mysql_select_db ($ dbTbaleName, $ conn) or die ("the database is not connected ");
Mysql_select_db ("$ dbTbaleName ");
$ Result = mysql_query ("select * from $ tab1") // obtain the Table query result.
Or die ("Query failed:". mysql_error ());
Echo ("<br> ");
$ I = 1; // This is to replace the last column name, so the symbol = 1 <> 0
Echo "create trigger". $ tab1. "_ insert before insert on $ tab1 <br> ";
Echo "for each row BEGIN <br> ";
Echo "insert into $ tab2 SET <br> ";
While ($ I <mysql_num_fields ($ result) {// a loop of the number of Columns

$ Meta = mysql_fetch_field ($ result); // obtain the diagonal corner of the column information.
If (! $ Meta ){
Echo "No information available <br/> n ";
}
// The following output is the trigger program column information
Echo "<pre>
'$ Meta-> name' = NEW. $ meta-> name,
</Pre> ";
$ I ++;
}
$ Meta = mysql_fetch_field ($ result );
Echo "<pre>
'$ Meta-> name' = NEW. $ meta-> name;
</Pre> ";
Mysql_free_result ($ result );
Echo ("END ;");

//-----------------------------------------------------------------
$ Result = mysql_query ("select * from $ tab1 ")
Or die ("Query failed:". mysql_error ());
$ I = 1;
If ($ I <mysql_num_fields ($ result )){

$ Meta = mysql_fetch_field ($ result );

//-----------------------------------------------------------------
/**
* Create trigger 'tri _ del 'before DELETE on 'aaa'
* For each row BEGIN
* Delete from bbb WHERE id = OLD. id;
*/
Echo ("<br> ");

Echo "create trigger". $ tab1. "_ del before delete on $ tab1 <br> ";
Echo "for each row BEGIN <br> ";

Echo "delete from $ tab2 WHERE $ meta-> name = OLD. $ meta-> name; <br> ";
Echo ("END ;");

}
//-----------------------------------------------------------------
Echo ("<br> ");
/**
* Create trigger 'up _ date' before update on 'aaa'
* For each row BEGIN
* UPDATE bbb set a1 = new. a1, a2 = new. a2 where id = new. id;
* END;
*/
$ Result = mysql_query ("select * from $ tab1 ")
Or die ("Query failed:". mysql_error ());
/**
* Get column metadata
*/
$ I = 1;
Echo "create trigger". $ tab1. "_ update before update on $ tab1 <br> ";
Echo "for each row BEGIN <br> ";
Echo "UPDATE $ tab2 SET <br> ";
While ($ I <mysql_num_fields ($ result )){

$ Meta = mysql_fetch_field ($ result );
If (! $ Meta ){
Echo "No information available <br/> n ";
}
Echo "<pre>
'$ Meta-> name' = NEW. $ meta-> name,
</Pre> ";
$ I ++;
}
$ Meta = mysql_fetch_field ($ result );
Echo "<pre>
'$ Meta-> name' = NEW. $ meta-> name
</Pre> ";
Mysql_free_result ($ result );
//-----------------------------
$ Result = mysql_query ("select * from $ tab1 ")
Or die ("Query failed:". mysql_error ());
$ I = 1;
If ($ I <mysql_num_fields ($ result )){

$ Meta = mysql_fetch_field ($ result );
Echo ("where $ meta-> name = new. $ meta-> name; <br> ");

Echo ("END ;");

}
?>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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Mysql trigger Database Data Synchronization Method

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