Question

我遇到一个问题，我只想显示一个查询，其中子查询的计数必须大于0。

我有这个SQL查询：

SELECT
  t.id           AS t__id,
  t.state_code   AS t__state_code,
  t.number       AS t__number,
  t.meta         AS t__meta,
  t.date_created AS t__date_created,
  (SELECT
     COUNT(t2.id)   AS t2__0
   FROM tbl_messages t2
     LEFT JOIN tbl_services t3
       ON t2.service_id = t3.id
   WHERE (t2.inbound_time BETWEEN "2011-01-31 16:00:00"
          AND "2011-02-28 15:59:59"
          AND t2.subscriber = t.number
          AND t3.pool_id = 48)) AS t__0
FROM tbl_subscribers t
WHERE (TRUE)
ORDER BY t__0 DESC
LIMIT 100;

我想只显示t__0＆gt;的数据。 0 ...如何在此查询中应用它？

我尝试了这个查询，但它不起作用：

SELECT
  t.id           AS t__id,
  t.state_code   AS t__state_code,
  t.number       AS t__number,
  t.meta         AS t__meta,
  t.date_created AS t__date_created,
  (SELECT
     COUNT(t2.id)   AS t2__0
   FROM tbl_messages t2
     LEFT JOIN tbl_services t3
       ON t2.service_id = t3.id
   WHERE (t2.inbound_time BETWEEN "2011-01-31 16:00:00"
          AND "2011-02-28 15:59:59"
          AND t2.subscriber = t.number
          AND t3.pool_id = 48)) AS t__0
FROM tbl_subscribers t
WHERE (t__0 > 0)
ORDER BY t__0 DESC
LIMIT 100

它会返回错误：

Query : SELECT    t.id           AS t__id,    t.state_code   AS t__state_code,    t.number       AS t__number,    t.meta         AS t__m...
Error Code : 1064
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'having t__0 > 0
LIMIT 100' at line 19
Execution Time : 00:00:00:000
Transfer Time  : 00:00:00:000
Total Time     : 00:00:00:000

Answer 1

请改为尝试：

SELECT
  t.id           AS t__id,
  t.state_code   AS t__state_code,
  t.number       AS t__number,
  t.meta         AS t__meta,
  t.date_created AS t__date_created,
  COUNT(t2.id)   AS t__0
FROM tbl_subscribers t
JOIN tbl_messages t2 ON t2.subscriber = t.number 
LEFT JOIN tbl_services t3 ON t2.service_id = t3.id 
WHERE t2.inbound_time BETWEEN "2011-01-31 16:00:00"
        AND "2011-02-28 15:59:59" 
        AND t3.pool_id = 48
GROUP BY t.id, t.state_code, t.number, t.meta, t.date_created 
HAVING COUNT(t2.id) > 0
ORDER BY t__0 DESC
LIMIT 100

MySQL子查询作为标准

1 个答案: