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Zend Framework ?????? ?? ?? ?? ??

高洛峰

Jan 05, 2017 am 09:31 AM

? ?? ????? Zend Framework ??????? ?? ??? ???? ????. ??? ?? ????? ?? ??? ??????.

<?php
//
// SELECT *
//   FROM round_table
//   WHERE noble_title = "Sir"
//   ORDER BY first_name
//   LIMIT 10 OFFSET 20
//
// 你可以使用一種重復(fù)定義的方式...
$select->from(&#39;round_table&#39;, &#39;*&#39;);
$select->where(&#39;noble_title = ?&#39;, &#39;Sir&#39;);
$select->order(&#39;first_name&#39;);
$select->limit(10,20);
// ...或者使用一種連續(xù)定義的方式:
$select->from(&#39;round_table&#39;, &#39;*&#39;)
->where(&#39;noble_title = ?&#39;, &#39;Sir&#39;)
->order(&#39;first_name&#39;)
->limit(10,20);
// 但是，讀取數(shù)據(jù)的方法相同
$sql = $select->__toString();
$result = $db->fetchAll($sql);
// 對(duì)于以上任一種方式，你都可以傳送$select對(duì)象本身
// 使用Zend_Db_Select對(duì)象的 __toString()方法就可以得到查詢語(yǔ)句
$result = $db->fetchAll($select);
?>

????? ???? ?? ???? ??? ?? ?? ???? ????? ??? ?? ????.

<?php
//
// SELECT *
//   FROM round_table
//   WHERE noble_title = "Sir"
//   ORDER BY first_name
//   LIMIT 10 OFFSET 20
//
$select->from(&#39;round_table&#39;, &#39;*&#39;)
  ->where(&#39;noble_title = :title&#39;)
  ->order(&#39;first_name&#39;)
  ->limit(10,20);
// 讀取結(jié)果使用綁定的參數(shù)
$params = array(&#39;title&#39; => &#39;Sir&#39;);
$result = $db->fetchAll($select, $params);
?>

?? ????? ?? ?? ??? ??

??? ????? ?? ?? ???? ?? ?? from() ???? ???? ??? ??? ??? ?? ??? ? ???? ?????. ??? ??? ? ?? ?? ???? ??? ? ???, from() ???? ??? ?? ?? ? ??? ? ????.

<?php
// 創(chuàng)建一個(gè)$db對(duì)象，假定adapter為Mysql
$select = $db->select();
// 從some_table表中讀取a,b,c三列
$select->from(&#39;some_table&#39;, &#39;a, b, c&#39;);
// 同樣可以:
$select->from(&#39;some_table&#39;, array(&#39;a&#39;, &#39;b&#39;, &#39;c&#39;);
// 從foo AS bar表中讀取列bar.col
$select->from(&#39;foo AS bar&#39;, &#39;bar.col&#39;);
// 從foo, bar兩個(gè)表中讀取foo.col 別名為col1，bar.col別名為col2
$select->from(&#39;foo&#39;, &#39;foo.col AS col1&#39;);
$select->from(&#39;bar&#39;, &#39;bar.col AS col2&#39;);
?>

?? ??? ?? ??

??? ?? ??? ???? ?? ???? Join() ???? ??? ? ????. ?? ??? ?? ??? ?? ??? ??? ??? ?? ??? ??? ?? ??(??: ? ??? ?? ???? ?? ??? ?? ???), ????? ??? ? ??? ?????. ?????, ??? ?? Join() ???? ??? ? ????.

<?php
// 創(chuàng)建一個(gè)$db對(duì)象，假定adapter為Mysql.
$select = $db->select();
//
// SELECT foo.*, bar.*
//   FROM foo
//   JOIN bar ON foo.id = bar.id
//
$select->from(&#39;foo&#39;, &#39;*&#39;);
$select->join(&#39;bar&#39;, &#39;foo.id = bar.id&#39;, &#39;*&#39;);
?>

WHERE ??

where ??? ???? ?? ?? where() ???? ??? ? ????. ?? ?? ???? ??? ?? ?? using?

<?php
// 創(chuàng)建一個(gè)$db對(duì)象，調(diào)用SELECT方法.
$select = $db->select();
//
// SELECT *
//   FROM round_table
//   WHERE noble_title = "Sir"
//   AND favorite_color = "yellow"
//
$select->from(&#39;round_table&#39;, &#39;*&#39;);
$select->where(&#39;noble_title = "Sir"&#39;); // embedded value
$select->where(&#39;favorite_color = ?&#39;, &#39;yellow&#39;); // quoted value
//
// SELECT *
//   FROM foo
//   WHERE bar = "baz"
//   OR id IN("1", "2", "3")
//
$select->from(&#39;foo&#39;, &#39;*&#39;);
$select->where(&#39;bar = ?&#39;, &#39;baz&#39;);
$select->orWhere(&#39;id IN(?)&#39;, array(1, 2, 3);
?>

GROUP BY ?

??? ?? group() ???? ?? ? ???? ??? ???? ???? ? ????

<?php
// 創(chuàng)建一個(gè)$db對(duì)象，調(diào)用SELECT方法.
$select = $db->select();
//
// SELECT COUNT(id)
//   FROM foo
//   GROUP BY bar, baz
//
$select->from(&#39;foo&#39;, &#39;COUNT(id)&#39;);
$select->group(&#39;bar&#39;);
$select->group(&#39;baz&#39;);
// 同樣可以這樣調(diào)用 group() 方法:
$select->group(&#39;bar, baz&#39;);
// 還可以:
$select->group(array(&#39;bar&#39;, &#39;baz&#39;));
?>

HAVING ??

?? ??? ?? ??? ???? ?? ???? ??() ???? ??? ? ????. ? ???? where() ???? ??? ??? ????.

have() ???? ?? ? ???? ? ?? ??? ?? "??"?? "or" ??? ???? ?? ?? orHaving() ???? ??? ? ????. .

<?php
// 創(chuàng)建一個(gè)$db對(duì)象，調(diào)用SELECT方法.
$select = $db->select();
//
// SELECT COUNT(id) AS count_id
//   FROM foo
//   GROUP BY bar, baz
//   HAVING count_id > "1"
//
$select->from(&#39;foo&#39;, &#39;COUNT(id) AS count_id&#39;);
$select->group(&#39;bar, baz&#39;);
$select->having(&#39;count_id > ?&#39;, 1);
?>

ORDER BY ?

??? ?? order() ???? ?? ? ???? ??? ????

<?php
// 創(chuàng)建一個(gè)$db對(duì)象，調(diào)用SELECT方法.
$select = $db->select();
//
// SELECT * FROM round_table
//   ORDER BY noble_title DESC, first_name ASC
//
$select->from(&#39;round_table&#39;, &#39;*&#39;);
$select->order(&#39;noble_title DESC&#39;);
$select->order(&#39;first_name&#39;);
// 同樣可以這樣調(diào)用 order() 方法:
$select->order(&#39;noble_title DESC, first_name&#39;);
// 還可以:
$select->order(array(&#39;noble_title DESC&#39;, &#39;first_name&#39;));
?>

?? ? ???? ??? ? ????. LIMIT ??? ??

Zend_db_select? ?????? ???? ??? ??? ??? ? ????. mysql ? postgresql? ?? ?? ??????? ?? ????? "limit:count" ??? ????? ?? ???? ?? ????? ????.

Microsoft? SQL Server, Oracle ? ?? ?? ??????? ?? ????? Limit ?? ?? ???? ?? ??? Limit ??? ???? ?? ?? ???? ????. MS-SQL?? ?? ???? ?? ??? ???? ???, Oracle? Limit ??? ????? ?? ???? ???? ??? ? ?????. zend_db_select? ????? ???? ???? ?? Oracle?? ?? ?? ?? ?????? ???? ?? ??? ???? ?? select ?? ?? ??? ? ????.

??? ? ??? ???? ???? ???? ??? ????? ? ??? ??? ???? ? ??? ??? ?? ?? ??? ???? ??() ???? ??? ? ????.

<?php
// 首先，一個(gè)簡(jiǎn)單的 "LIMIT :count"
$select = $db->select();
$select->from(&#39;foo&#39;, &#39;*&#39;);
$select->order(&#39;id&#39;);
$select->limit(10);
//
// 在mysql/psotgreSql/SQLite,可以得到這樣的語(yǔ)句：
//
// SELECT * FROM foo
//   ORDER BY id ASC
//   LIMIT 10
//
// 但是在Microsoft SQL下,可以得到這樣的語(yǔ)句：
//
// SELECT TOP 10 * FROM FOO
//   ORDER BY id ASC
//
//
// 現(xiàn)在, 是更復(fù)雜的 "LIMIT :count OFFSET :offset"方法
$select = $db->select();
$select->from(&#39;foo&#39;, &#39;*&#39;);
$select->order(&#39;id&#39;);
$select->limit(10, 20);
//
// 在mysql/psotgreSql/SQLite,可以得到這樣的語(yǔ)句：
//
// SELECT * FROM foo
//   ORDER BY id ASC
//   LIMIT 10 OFFSET 20
//
// 但是在Microsoft SQL下,由于不支持偏移量功能,可以得到這樣sql語(yǔ)句:
//
// SELECT * FROM (
//   SELECT TOP 10 * FROM (
//     SELECT TOP 30 * FROM foo ORDER BY id DESC
//   ) ORDER BY id ASC
// )
//
// Zend_Db_Adapter 可以自動(dòng)的完成sql語(yǔ)句的動(dòng)態(tài)創(chuàng)建.
//
?>

LIMIT ??? ? ? ?? ? ??

Zend_db_select? ??? ?? ?? ??? ?????. ???? ?? "??? ?"? ??? ????, ??? ??? ?? ? ???? ???? ??? ?? ?? ????? ????? ?? ???.

<?php
// 構(gòu)造基礎(chǔ)的select方法:
$select = $db->select();
$select->from(&#39;foo&#39;, &#39;*&#39;);
$select->order(&#39;id&#39;);
// ... 限制到第三頁(yè),每頁(yè)包括10行數(shù)據(jù)
$select->limitPage(3, 10);
//
// 在MySQL/PostgreSQL/SQLite下, 可以得到:
//
// SELECT * FROM foo
//   ORDER BY id ASC
//   LIMIT 10 OFFSET 20
//
?>

? ??? Zend Framework ?????? ???? ?? ?? ??? PHP ?????? ??? ??? ????.

? ?? Zend Framework ?????? ?? ?? ??? ?? ?? ?? ???? PHP ??? ????? ??????!

? ????? ??

? ?? ??? ????? ???? ??? ??????, ???? ?????? ????. ? ???? ?? ???? ?? ??? ?? ????. ???? ??? ???? ???? ??? ?? admin@php.cn?? ?????.