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    TableSelect::groupBy

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    TableSelect::groupBy — Set select grouping criteria

    说明

    public mysql_xdevapi\TableSelect::groupBy(mixed $sort_expr): mysql_xdevapi\TableSelect

    Sets a grouping criteria for the result set.

    参数

    sort_expr

    The grouping criteria.

    返回值

    A TableSelect object.

    示例

    示例 #1 mysql_xdevapi\TableSelect::groupBy() example

    <?php
    $session     = mysql_xdevapi\getSession("mysqlx://user:password@localhost");

    $session->sql("DROP DATABASE IF EXISTS addressbook")->execute();
    $session->sql("CREATE DATABASE addressbook")->execute();
    $session->sql("CREATE TABLE addressbook.names(name text, age int)")->execute();
    $session->sql("INSERT INTO addressbook.names values ('John', 42), ('Sam', 42)")->execute();
    $session->sql("INSERT INTO addressbook.names values ('Suki', 31)")->execute();

    $schema = $session->getSchema("addressbook");
    $table = $schema->getTable("names");

    $result = $table->select('count(*) as count', 'age')
    ->    groupBy('age')->orderBy('age asc')
    ->    execute();

    $row = $result->fetchAll();
    print_r($row);
    ?>

    以上示例的输出类似于：

    Array
(
    [0] => Array
        (
            [count] => 1
            [age] => 31
        )
    [1] => Array
        (
            [count] => 2
            [age] => 42
        )
)
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