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TableSelect::groupBy — 设置选择分组标准
sort_expr分组标准。
一个 TableSelect 对象。
示例 #1 mysql_xdevapi\TableSelect::groupBy() 示例
<?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);
?>上面的示例将输出类似于以下内容
Array
(
[0] => Array
(
[count] => 1
[age] => 31
)
[1] => Array
(
[count] => 2
[age] => 42
)
)