php - 联合所有的子查询计数

Question

我的查询从 3 个表中选择数据，将结果设置为“标题”(一个表的“描述”列是我需要查看的列)。我还创建了一个结果“doctype”，其值表示在哪个表中找到它以供以后用于前端过滤器。然后它按以下方式订购:

1. 结果以搜索词开头
2. 结果在中间某处包含搜索词
3. 结果以搜索词结尾

我需要的是获取查询中每个子查询的计数:

SELECT * FROM (
    SELECT Title as title, 'docs' AS 'doctype' FROM docs 
    WHERE status IN ('publish', 'draft', 'review') AND Title LIKE '%' :searchterm '%'
UNION ALL
    SELECT Title as title, 'sheets' AS 'doctype' FROM sheets 
    WHERE status IN ('publish', 'draft', 'review') AND Title LIKE '%' :searchterm '%'
UNION ALL 
  SELECT Description AS title, 'pres' AS 'doctype' from presentations 
  WHERE status IN ('publish', 'draft', 'review') AND Description LIKE '%' :searchterm '%'
) FINAL
    ORDER BY
      CASE
        WHEN title LIKE :searchterm '%' THEN 1
        WHEN title LIKE '%' :searchterm THEN 3
        ELSE 2
      END
    LIMIT 300

同时确认可以在 ORDER BY 中使用别名('title')。

Answer 1

在您的子查询中添加一个计数字段和一个 groupby 子句

已更新

SELECT 
(SELECT count(*) FROM docs WHERE status IN ('publish', 'draft', 'review') AND Title LIKE '%' :searchterm '%') as 'count_docs'
,(SELECT count(*) FROM sheets WHERE status IN ('publish', 'draft', 'review') AND Title LIKE '%' :searchterm '%') as 'count_sheets'
,(SELECT count(*) FROM presentations WHERE status IN ('publish', 'draft', 'review') AND Description LIKE '%' :searchterm '%') as 'count_pres'
, FINAL.*
FROM (
    SELECT Title as title, 'docs' AS 'doctype' FROM docs 
    WHERE status IN ('publish', 'draft', 'review') AND Title LIKE '%' :searchterm '%'
UNION ALL
    SELECT Title as title, 'sheets' AS 'doctype' FROM sheets 
    WHERE status IN ('publish', 'draft', 'review') AND Title LIKE '%' :searchterm '%'
UNION ALL 
  SELECT Description AS title, 'pres' AS 'doctype' from presentations 
  WHERE status IN ('publish', 'draft', 'review') AND Description LIKE '%' :searchterm '%'
) as FINAL
    ORDER BY
      CASE
        WHEN title LIKE :searchterm '%' THEN 1
        WHEN title LIKE '%' :searchterm THEN 3
        ELSE 2
      END
    LIMIT 300