mysql删除连续的行

Question

我有以下查询:

select count(*)
FROM
    cumul AS t1,
    cumul AS t2
WHERE
    t1.id+1 = t2.id
and
    t2.spec_datetime-t1.spec_datetime < 0.001
and
    t1.id < 100000
and
    t1.v1-t2.v1 = 0
and
    t1.v2-t2.v2 =0;

我想删除相同的记录:

DELETE FROM cumul AS t1, cumul AS t2
WHERE
    t1.id+1 = t2.id
and
    t2.spec_datetime-t1.spec_datetime < 0.001
and
    t1.v1-t2.v1 = 0
and
    t1.v2-t2.v2 = 0;

我得到:

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AS t1 , cumul AS t2 WHERE t1.id+1 = t2.id and t2.spec_datetime-t1.spec_datetime <' at line 1

如何更正查询？

Answer 1

DELETE t1 FROM cumul AS t1, cumul AS t2  
       ^^
Just add alias before FROM

So try this:

DELETE t1 FROM cumul AS t1, cumul AS t2
WHERE
    t1.id+1 = t2.id
and
    t2.spec_datetime-t1.spec_datetime < 0.001
and
    t1.v1-t2.v1 = 0
and
    t1.v2-t2.v2 = 0;

引用MySQL :: 13.2.2. DELETE Syntax获取更多信息。