sql 查询在一列中全部为是

Question

我正在尝试进行 sql 查询，以便在名为 checked 的列中仅具有“是”值，但它总是 return 我也像 Microsoft Access 上的“否”值:

CHECKED | POINTS VUS
NULL    | 4
YES     | 4

如果有人能帮助我。非常感谢你。这是我的查询：

SELECT
  CHECKED, 
  COUNT(*) AS `POINTS VUS`
FROM
  ARCHPOINTS
GROUP BY CHECKED 
HAVING COUNT(*) = yes

Answer 1

我想你可以试试这个 =>

SELECT
  CHECKED,
  COUNT(*) AS `POINTS VUS`
FROM
  ARCHPOINTS
  WHERE CHECKED='yes'
  GROUP BY CHECKED

sql query to have all yes in a column