如何在SQL中SELECT和COUNT行？

Question

如何在一个查询中获得结果并计算结果？ （我正在使用PDO语句）

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

这会将记录计数放在每行的末尾。

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

Answer 3

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

Answer 4

你应该只执行一个查询......

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

你可以通过mysql_num_rows（）获得总计数;功能..像这样......

$count = mysql_num_rows($res);