$sql = "(select {$this->fields} "." from {$curTable} " ." {$this->where} {$endwhere} order by {$this->orderByField} {$this->orderBy}) "; } else { $sql = "(select {$this->fields} "." from {$curTable} " ." {$this->where} order by {$this->orderByField} {$this...
ORDER BY子句按照指定的列或表达式对结果集进行排序,可以按升序(ASC)或降序(DESC)进行排序。在CodeIgniter中,我们可以使用Active Record类来构建查询语句,并使用order_by()方法添加ORDER BY子句。 以下是一个示例代码,演示如何在CodeIgniter中使用ORDER BY子句: ...
() // 排序 ->order_by($this->withOrder) // 分组 ->group_by($this->withGroup) // 条数 ->limit($limit) // 偏移量 ->offset($offset); return $this; } /** * 设置 写入 生成器 * * @return $this */ protected function setWriteBuilder() { // 软应用 $this->softApply(); //...
在Codeigniter中,group_by和order_by是两个常用的数据库查询语句。group_by用于按照指定的列对结果进行分组,而order_by用于对结果进行排序。 然而,在某些情况下,使用group_by和order_by同时进行可能会导致冲突。这是因为group_by会将结果集按照指定的列进行分组,而order_by则会对整个结果集进行排序。当group_by和or...
} else { $this->db->order_by("category", "asc"); } 但是,我得到了这个错误: Error Number: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Couch'`, `'Bed'`, `'Desk` & Office', `'Bike...
$ids = [1,2,3,4,5] ->where_in('id',[Math Processing Error]ids);−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−ids是一个数组 ->where_not_in('id',$ids);---与上对立 $array = array('...
这里我使用的是CodeIgniter3的框架,我们新建一个Model,来管理用户deviceToken数据。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
// Note that the second parameter of the get_compiled_select method is FALSE $sql = $this->db->select(array('field1','field2')) ->where('field3',5) ->get_compiled_select('mytable', FALSE); // ... // Do something crazy with the SQL code... like add it to a cron script...
25 -- 14:53:05 App Complete Food Order Website [ PHP and MySQL ] 7417 2 37:47:45 App Make a compiler 22 -- 3:54:25 App Wordpress Hooks Tutorial for beginners from scratch 61 -- 6:39:38 App Learn CodeIgniter 4 Tutorials Step By Step 23 -- 7:36:00 App blog management ...
1 2 3 ->order_by('title DESC, name ASC');---title降序name升序 ->order_by('name','RANDOM');---随机排序,第一个参数无实际意义,但是要写,随机嘛,谈不上根据哪个字段随机了五、分页1 2 3 ->limit(10);---未设置偏移量,那么默认偏移...