联合所有的子查询计数

Question

我的查询从3个表中选择数据，并将结果设置为“ title”（其中一个表具有“ description”作为我需要查看的列）。 我还创建了一个结果“ doctype”，其值表示后来发现该表用于前端过滤器。 然后按以下顺序排序：

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

并确认可以在ORDER BY中使用别名（“ title”）。

Answer 1

在您的子查询中添加计数字段和groupby子句

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