我在MySQL中有此表,例如:
ID | Name 1 | Bob 4 | Adam 6 | Someguy
如果您注意到,则没有ID号(2、3和5)。
如何编写查询,以便MySQL仅回答缺少的ID,在这种情况下为“ 2,3,5”?
SELECT a.id+1 AS start, MIN(b.id) - 1 AS end FROM testtable AS a, testtable AS b WHERE a.id < b.id GROUP BY a.id HAVING start < MIN(b.id)
希望此链接也对http://www.codediesel.com/mysql/sequence-gaps-in- mysql/有帮助