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mysql_real_connect( ..., CLIENT_MULTI_STATEMENTS );
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mysql_set_server_option( mysql, MYSQL_OPTION_MULTI_STATEMENTS_ON ); //mysqlÊÇÁ¬½ÓµÄÃû³Æ
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do
{
/* Process all results */
...
printf( "total affected rows: %lld", mysql_affected_rows( mysql ) );
...
if( !( result mysql_store_result( mysql ) ) )
{
printf( stderr, "Got fatal error processing query\n" );
exit(1);
}
process_result_set(result); /* client function */
mysql_free_result(result);
}while( !mysql_next_result( mysql ) );
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do
{
result = mysql_store_result( mysql );
mysql_free_result(result);
}while( !mysql_next_result( mysql ) );


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alter table tablename drop column id;
alter table tablename add id mediumint(8) not null primary key auto_increment first;
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