计算 Codeigniters 中两个 MySQL 表中的所有行

Question

Hi need to count all rows in two MySQL tables. Tables have same structure and the code I'm using in the model file is the following:

$this->regs_db->select ("*");
$this->regs_db->from("$this->table_images_civil, $this->table_images_military");

return $this->regs_db->count_all_results();

The result I'm getting is not correct at all. I know that in the first table there are 10,934 rows, in the second one there are 1,299 rows...but the result I get is 14,203,266. What's wrong with the code above? Thanks a lot for any hint.

EDIT: below table strusture...same for both tables

Answer 1

First, I'd drop Code Igniter's DB methods. They're (in my view) obstructive and useless for anything except basic query structures.

With that in mind, you can achieve what you want with something like this:

$sql = '
SELECT
    (SELECT COUNT(id) FROM `'.$this->table_images_civil.'`) AS tbl1Count,
    (SELECT COUNT(id) FROM `'.$this->table_images_military.'`) AS tbl2Count';
$request = $this->regs_db->query($sql);
$arr = $request->fetch_assoc();

Answer 2

$this->db->from('yourtable');
[... more active record code ...]
$query = $this->db->get();
$rowcount = $query->num_rows();