Let me see how to write this mysql statement!

Let me see how to write this mysql statement! Test
Name add num

A wefsv 3

B asdf 4
B wers 9
B w1rs 10

As asdf 11
As wers 12
As w3rs 13

For example, in the preceding table, select * from test ......

To select the following result (the largest num in each name, as long as one line, no matter what else !)
A wefsv 3
B w1rs 10
As w3rs 13

What should I do if I want to select two rows?

B wers 9
B w1rs 10

As wers 12
As w3rs 13

A wefsv 3

Reply to discussion (solution)

Slect name, add, num from test group by add order by add desc

Slect name, add, num from test group by add order by add desc

Great God! No! Each selected num is not the largest

The maximum line of each name
Select *
From test
Where not exists (select 1 from test where name = a. name and num> a. num );

Question 1

select * from (select * from test order by num desc) t group by name

name add   num a    wefsv 3 as   w3rs  13 b    w1rs  10 

Question 1

select * from (select * from test order by num desc) t group by name

name add   num a    wefsv 3 as   w3rs  13 b    w1rs  10 

1 line

Select * from test a where 0 = (select count (*) from test where name = a. name and num> a. num)

2 rows

Select * from test a where 2> (select count (*) from test where name = a. name and num> a. num)

1 line

Select * from test a where 0 = (select count (*) from test where name = a. name and num> a. num)

2 rows

Select * from test a where 2> (select count (*) from test where name = a. name and num> a. num)

Awesome! I couldn't get it out for half an hour yesterday !, Thank you! I feel the best about you!

Question 2

select * from test t where 2>(select count(*) from test where num>t.num and name=t.name);

name add   num a    wefsv 3 b    wers  9 b    w1rs  10 as   wers  12 as   w3rs  13 

So question 1 is written again
Select * from test t
Where 1> (select count (*) from test1 where num> t. num and name = t. name)