我有以下 SQL 查询:
$sql = "
SELECT
id,
refid,
action_id,
action_type,
co_user_id,
cust_vend_id,
cust_vend_type,
Aes_decrypt(cust_vend_name, '".DBKEY."') AS cust_vend_name,
Aes_decrypt(amount, '".DBKEY."') AS amount,
Aes_decrypt(action_date, '".DBKEY."') AS action_date,
Aes_decrypt(memo, '".DBKEY."') AS memo,
Aes_decrypt(trans_id, '".DBKEY."') AS trans_id,
entry_datetime,
part_id,
polarity
FROM
generated_actions
WHERE acc_type = 1
AND acc_id = $ref_id
AND action_type != 2
AND reverse_id IS NULL
ORDER BY generated_actions.action_id DESC ";
它有效,但我需要添加一个 INNER JOIN ONcustomers
或者vendors
取决于cust_vend_type
列的内容是'1'(客户)还是'2'(供应商),然后customers_comp_name
如果是'1'或者'vendors_comp_name'如果是'2 '。
期待选择最佳解决方案或标记有用的建议!
更新
这是使用下面@ciaran 的响应更新的代码。问题是它似乎返回一个空的结果集,即使我知道有合格的记录。
$sql = "
SELECT
ga.id,
ga.refid,
ga.action_id,
ga.action_type,
ga.co_user_id,
ga.cust_vend_id,
ga.cust_vend_type,
Aes_decrypt(ga.amount, '".DBKEY."') AS amount,
Aes_decrypt(ga.action_date, '".DBKEY."') AS action_date,
Aes_decrypt(ga.memo, '".DBKEY."') AS memo,
Aes_decrypt(ga.trans_id, '".DBKEY."') AS trans_id,
ga.entry_datetime,
ga.part_id,
ga.polarity,
SELECT CASE
WHEN
ga.cust_vend_type IS NULL
THEN
NULL
WHEN
ga.cust_vend_type = '1'
THEN
AES_DECRYPT(c.cust_comp_name, '".DBKEY."')
ELSE
AES_DECRYPT(v.vendor_comp_name, '".DBKEY."') END AS cust_vend_name
FROM
generated_actions ga
LEFT OUTER JOIN
customers c
ON
c.cust_id = ga.cust_vend_id
LEFT OUTER JOIN
vendors v
ON
v.vendor_id = ga.cust_vend_id
WHERE
ga.acc_type = 1
AND
ga.acc_id = $ref_id
AND
ga.action_type != 2
AND
ga.reverse_id IS NULL
ORDER BY
ga.action_id DESC ";
不知道我做错了什么?