Codeigniter如何删除＆＃34;`＆＃34;在子查询中

Question

我在from子句中运行子查询时遇到问题。
这是我的代码

$subquery = "select column1, column2 from table limit 10, 10"
$this->db->select(column1, false)->from("( $subquery ) as b");
$this->db->get();

我收到数据库错误“未声明的变量：10” 打印我的查询是：

select column1 from ((select column1, column2 from table limit 10, `10` ) as b)

如何删除此字符“`”

Answer 1

您可以使用$ this-＆gt; db-＆gt; _protect_identifiers = false;这将删除此查询的所有反引号。

所以你的查询将是：

$subquery = "select column1, column2 from table limit 10, 10"
$this->db->_protect_identifiers=false;
$this->db->select(column1, false)->from("( $subquery ) as b");
$this->db->_protect_identifiers=true;   // You can make it true again here to avoid removing of backtickes in further code unnecessarily 
$this->db->get();

Answer 2

试试这个：

$subquery = "select column1, column2 from table limit 10, 10";
$this->db->query("Select column1 from (".$subquery.") as b" );