php - 将两个 mysql 查询连接在一起

Question

我有以下两个查询，我想将它们合并到一个查询中。我尝试过但无法实现，请您帮助我吗？

提前致谢:)

查询:1

" SELECT * FROM vouchers 
LEFT JOIN details on vouchers.voucher_no = details.voucher_no 
LEFT JOIN   accounts on accounts.code = details.t_code 
     WHERE (voucher_type='1' AND account_code='1001')
        OR (voucher_type='0' AND t_code='1001')
        OR (voucher_type='0' AND account_code='1001')"

查询:2

"SELECT * FROM details 
LEFT JOIN vouchers on details.voucher_no = vouchers.voucher_no 
LEFT JOIN accounts on accounts.code = vouchers.account_code 
    WHERE (voucher_type='1' AND account_code='1001') 
       OR (voucher_type='0' AND t_code='1001') 
       OR (voucher_type='0' AND account_code='1001')"

我尝试了以下操作，但收到一条错误消息，指出 SQL 语法有错误。

 $getData = $this->db->query("SELECT * FROM vouchers 
 LEFT JOIN details on vouchers.voucher_no = details.voucher_no 
 LEFT JOIN   accounts on accounts.code = details.t_code 
     WHERE (voucher_type='1' AND account_code='1001')
        OR (voucher_type='0' AND t_code='1001')
        OR (voucher_type='0' AND account_code='1001'), <<I just separated with a comma

SELECT * FROM details 
LEFT JOIN vouchers on details.voucher_no = vouchers.voucher_no 
LEFT JOIN accounts on accounts.code = vouchers.account_code 
    WHERE (voucher_type='1' AND account_code='1001') 
       OR (voucher_type='0' AND t_code='1001') 
       OR (voucher_type='0' AND account_code='1001')");

if($getData->num_rows() > 0)
return $getData->result_array();
else
return null;
}

Answer 1

使用 UNION ALL 连接它们

 $getData = $this->db->query("SELECT * FROM vouchers 
 LEFT JOIN details on vouchers.voucher_no = details.voucher_no 
 LEFT JOIN   accounts on accounts.code = details.t_code 
     WHERE (voucher_type='1' AND account_code='1001')
        OR (voucher_type='0' AND t_code='1001')
        OR (voucher_type='0' AND account_code='1001')

UNION ALL

SELECT * FROM details 
LEFT JOIN vouchers on details.voucher_no = vouchers.voucher_no 
LEFT JOIN accounts on accounts.code = vouchers.account_code 
    WHERE (voucher_type='1' AND account_code='1001') 
       OR (voucher_type='0' AND t_code='1001') 
       OR (voucher_type='0' AND account_code='1001')");