Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
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create table t (
user_id int, value_1 int, value_2 int
);
insert into t
values
(100, 50, 1),
(100, 50, 2),
(101, 50, 1),
(101, 50, 2),
(102, 50, 2),
(102, 50, 3);
select
*
from
t;
delete from
t
where
exists (
select
1
from
t tdouble
where
t.user_id = tdouble.user_id
and t.value_1 = tdouble.value_1
and t.value_2 > tdouble.value_2
);
select
*
from
t;
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