一個ORACLE分頁程式，挺實用的.

Paging Test








// How to split the result into pages, like 'limits' in MySQL?
// ===========================================================
// Tutorial by Neil Craig (neilc@netactive.co.za)
// Date: 2001-06-05
// With this example, I will explain paging of database queries where the
// result is more than the developer want to PRint to the page, but wish to
// split the result into seperate pages.
// The table "SAMPLE_TABLE" accessed in this tutorial has 4 fields:
// PK_ID, FIELD1, FIELD2 and FIELD3. The types don't matter but you should
// define a primary key on the PK_ID field.

$display_rows = 5;　　 // The rows that should be display at a time. You can
　　　　　　　　　　　 // modify this if you like.

// Connect to the Oracle database
putenv("ORACLE_SID=purk");
putenv("ORACLE_HOME=/export/oracle8i");
putenv("TNS_ADMIN=$ORACLE_HOME/network/admin");
$OracleDBConn = OCILogon("purk","purk","lengana.world");

// This query counts the records
$sql_count = "SELECT COUNT(*) FROM SAMPLE_TABLE";

// Parse the SQL string & execute it
$row_count=OCIParse($OracleDBConn, $sql_count);　　　
OCIExecute($row_count);

// From the parsed & executed query, we get the amount of records found.
// I'm not storing this result into a session variable because it allows for
// new records to be shown as it is entered by another user while the result
// is printed.
if (OCIFetch($row_count)) {
　　$num_rows = OCIResult($row_count,1);
} else {
　　$num_rows = 0;　　　　// If no record was found
}

// Free the resources that were used for this query
OCIFreeStatement($row_count);

// We need to prepare the query that will print the results as a page. I will
// explain the query to you in detail.

// If no page was specified in the url (ex. http://mysite.com/result.php?page=2),
// set it to page 1.
if (empty($page) || $page == 0) {
　　$page = 1;
}

// The start range from where the results should be printed
$start_range = (($page - 1) * $display_rows) + 1;

// The end range to where the results should be printed
$end_range = $page * $display_rows;

// The main query. It consists of 3 "SELECT" statements nested into each
// other. The center query is the query you would normally use to return the
// records you want. Do you ordering and "WHERE" clauses in this statement.
// We select the rows to limit our results but because the row numbers are
// assigned to the rows before any ordering is done, lets the code print the
// result unsorted.
// The second nested "SELECTED" assigns the new row numbers to the result
// for us to select from.

$sql = "SELECT PK_ID, FIELD1, FIELD2, FIELD3, ROW_NO FROM (SELECT PK_ID, ";
$sql .= "FIELD1, FIELD2, FIELD3, ROWNUM ROW_NO FROM (SELECT PK_ID, FIELD1, ";
$sql .= "FIELD2, FIELD3 FROM SAMPLE_TABLE ORDER BY FIELD3)) WHERE ROW_NO BETWEEN ";
$sql .= $start_range." AND ".$end_range;

// start results formatting
echo "

































";echo " "; echo " ";echo " ";echo " ";echo " ";echo " ";echo " ";if ($num_rows != 0) {　　// Parse the SQL string & execute it　　$rs=OCIParse($OracleDBConn, $sql);　　　 　　OCIExecute($rs);　　　　// get number of columns for use later　　$num_columns = OCINumCols($rs);　　　　while (OCIFetch($rs)){　　　　echo " ";　　　　for ($i = 1; $i < ($num_columns + 1); $i++) {　　　　　　$column_value = OCIResult($rs,$i);　　　　　　echo " ";　　　　}　　　　echo " ";　　}　　　　} else {　　// Print a message stating that no records was found　　echo " ";}// Close the tableecho "

PK ID	Field 1	Field 2	Field 3	Row No
$column_value
Sorry! No records was found

";

// free resources and close connection
OCIFreeStatement($rs);
OCILogoff($OracleDBConn);

?>


// Here we will print the links to the other pages

// Calculating the amount of pages
if ($num_rows % $display_rows == 0) {
　　$total_pages = $num_rows / $display_rows;
} else {
　　$total_pages = ($num_rows / $display_rows) + 1;
　　settype($total_pages, integer); // Rounding the variable
}

// If this is not the first page print a link to the previous page
if ($page != 1) {
　　echo "Previous";
}

// Now we can print the links to the other pages
for ($i = 1; $i <= $total_pages;　$i++) {
　　if ($page == $i){
　　　　// Don't print the link to the current page
　　　　echo " ".$i;
　　} else {
　　　　//Print the links to the other pages
　　　　echo " ".$i."";
　　}
}

// If this is not the last page print a link to the next page
if ($page < $total_pages) {
　　echo " Next";
}

?>


// I'm just adding this section to print some of the variables for extra info
// and some debugging

echo "

Total pages: ".$total_pages."

";
echo "

Number of records: ".$num_rows."

";
echo "

The SQL Query is: ".$sql."

";

?>

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