如何获取那些在MySQL中所有值都相同的行

Question

I have a table:

Unique Value        Remarks
URTA-144            ACC
URTA-144            ADD
URTA-144            ADT
URTA-145            ALL
URTA-145            ALL
URTA-145            ALL

I want to fetch those rows where for each distinct Unique Value I have same value in Remarks .

For Example:

Unique Value
URTA-145

Answer 1

Try this:

create table Tbl(UniqueValue char(8), Remarks char(3));
insert into Tbl values
('URTA-144', 'ACC'),
('URTA-144', 'ADD'),
('URTA-144', 'ADT'),
('URTA-145', 'ALL'),
('URTA-145', 'ALL'),
('URTA-145', 'ALL');

select UniqueValue from Tbl
group by UniqueValue
having count(distinct Remarks) = 1;