如何在SQL中選擇和計數行？

Question

如何獲得結果並在一個查詢中計算結果？ （我正在使用PDO語句）

SELECT * FROM table; // gets results
SELECT COUNT(*) FROM table; // counts results

Answer 1

$result = mysql_query( "SELECT * FROM table");
$count = mysql_num_rows( $result);

使用PDO：

$statement = $dbh->prepare('SELECT * FROM table');
$statement->execute();
$count = $statement->rowCount();

Answer 2

這會將記錄計數放在每一行的末尾。

SELECT *
   , COUNT(1) OVER () AS RecordCount
FROM table;

Answer 3

SELECT *, (select count(*) FROM table) ct FROM table

Answer 4

您應該只執行一個查詢...

$sql = SELECT * FROM table;
$res = mysql_query($sql);

您可以通過mysql_num_rows（）獲得總數。 功能..像這樣..

$count = mysql_num_rows($res);