1、查詢表中多餘的重複記錄，重複記錄是根據單個欄位（peopleId）來判斷

SELECT
	*
FROM
	people
WHERE
	peopleid IN (
		SELECT
			peopleid
		FROM
			people
		GROUP BY
			peopleid
		HAVING
			COUNT (peopleid) > 1
	)

2、刪除表中多餘的重複記錄，重複記錄是根據單個欄位（peopleId）來判斷，只留有rowid最小的記錄

DELETE
FROM
	people
WHERE
	peopleid IN (
		SELECT
			peopleid
		FROM
			people
		GROUP BY
			peopleid
		HAVING
			COUNT (peopleid) > 1
	)
AND ROWID NOT IN (
	SELECT
		MIN (ROWID)
	FROM
		people
	GROUP BY
		peopleid
	HAVING
		COUNT (peopleid) > 1
)
 

3、查詢表中多餘的重複記錄（多個欄位）

SELECT
	*
FROM
	vitae A
WHERE
	(A .peopleid, A .seq) IN (
		SELECT
			peopleid,
			seq
		FROM
			vitae
		GROUP BY
			peopleid,
			seq
		HAVING
			COUNT (*) > 1
	)

4、刪除表中多餘的重複記錄（多個欄位），只留有rowid最小的記錄

DELETE
FROM
	vitae A
WHERE
	(A .peopleid, A .seq) IN (
		SELECT
			peopleid,
			seq
		FROM
			vitae
		GROUP BY
			peopleid,
			seq
		HAVING
			COUNT (*) > 1
	)
AND ROWID NOT IN (
	SELECT
		MIN (ROWID)
	FROM
		vitae
	GROUP BY
		peopleid,
		seq
	HAVING
		COUNT (*) > 1
)
 

5、查詢表中多餘的重複記錄（多個欄位），不包含rowid最小的記錄

SELECT
	*
FROM
	vitae A
WHERE
	(A .peopleid, A .seq) IN (
		SELECT
			peopleid,
			seq
		FROM
			vitae
		GROUP BY
			peopleid,
			seq
		HAVING
			COUNT (*) > 1
	)
AND ROWID NOT IN (
	SELECT
		MIN (ROWID)
	FROM
		vitae
	GROUP BY
		peopleid,
		seq
	HAVING
		COUNT (*) > 1
)