在SQL中添加由任意值填充的列

Question

基本上,我有一个返回2列的查询:

SELECT ACTION_LOG_ID, COMMUNICATIONS_ID
FROM consumer_action_log
WHERE COMM_TYPE_ID=4

对于此查询的结果集中的每一行,我想添加标题为Customer_ID的值234.这是我最好的尝试:

SELECT ACTION_LOG_ID, COMMUNICATIONS_ID
FROM consumer_action_log
WHERE COMM_TYPE_ID=4
UNION 
SELECT CONSUMER_ID,CONSUMER_FIRST_NAME
FROM consumer_profile
WHERE CONSUMER_ID=234;

注意:查询后半部分的结果将始终为234.我正在使用MySQL.

Answer 1

试试这个:

SELECT 234 AS CONSUMER_ID, ACTION_LOG_ID, COMMUNICATIONS_ID 
  FROM consumer_action_log 
 WHERE COMM_TYPE_ID=4