ms-access - 如何在 Access SQL 中执行 INTERSECT 查询

Question

我有这个 Python 片段，用于查询 SQLite 表“note”、“tag”和多对多联接表“fkeys”。我想这很程序化，但它确实有效。现在我想在 Access 中做类似的事情，但 Jet SQL 不支持 INTERSECT 。

几个小时以来，我一直在尝试类似帖子中的代码。 WHERE EXISTS 或 GROUP BY ... HAVING + 子查询的东西都不起作用。 SQL-92 选项也没有帮助。这可以在 Jet SQL 中完成吗？

  db.execute('SELECT DISTINCT n.rowid as rowid, n.note_txt as note_txt,\
  date(n.timestamp) as timestamp\
  FROM note n\
  JOIN fkeys f\
  ON n.rowid = f.note_id\
  JOIN tag t\
  ON t.rowid = f.tag_id\
  WHERE t.tag_text = ?\
INTERSECT  \
  SELECT DISTINCT n.rowid as rowid, n.note_txt as note_txt,\
  date(n.timestamp) as timestamp\
  FROM note n\
  JOIN fkeys f\
  ON n.rowid = f.note_id\
  JOIN tag t\
  ON t.rowid = f.tag_id\
  WHERE t.tag_text = ?\
INTERSECT\
  SELECT DISTINCT n.rowid as rowid, n.note_txt as note_txt,\
  date(n.timestamp) as timestamp\
  FROM note n\
  JOIN fkeys f\
  ON n.rowid = f.note_id\
  JOIN tag t\
  ON t.rowid = f.tag_id\
  WHERE t.tag_text = ?\
  ORDER BY timestamp',[srchtxt0,srchtxt1,srchtxt2])

Answer 1

我相信以下内容应该适用于 ACE/Jet 数据库:

sql = """
SELECT rowid, note_txt, timestamp
FROM [note]
WHERE
    rowid IN
        (
            SELECT f.note_id
            FROM 
                [fkeys] AS f 
                INNER JOIN 
                [tag] AS t 
                    ON t.rowid = f.tag_id 
            WHERE t.tag_text = ?
        )
        AND rowid IN
            (
                SELECT f.note_id
                FROM 
                    [fkeys] AS f 
                    INNER JOIN 
                    [tag] AS t 
                        ON t.rowid = f.tag_id 
                WHERE t.tag_text = ?
            )
        AND rowid IN
            (
                SELECT f.note_id
                FROM 
                    [fkeys] AS f 
                    INNER JOIN 
                    [tag] AS t 
                        ON t.rowid = f.tag_id 
                WHERE t.tag_text = ?
            )
ORDER BY 3 
"""
cursor1 = db.execute(sql,[srchtxt0,srchtxt1,srchtxt2])