A priority SQL problem

TYPE

RATE

TYPE

RATE

TYPE

RATE

TYPE

RATE

TYPE

RATE

M

1

Use this

M

1

Use this

M

1

Use this

M

1

Use this

N

1

Use this

N

2

N

2

O

2

N

2

O

2

O

3

SQL How to achieve M>N>O The order of priority , When there is only one, only the corresponding , Consider the priority order when multiple

---

Other answers 1：

order by type limit 1 Just take the first one .

Other answers 2：

row_number() over(partition by FCURR,RATEorder by TYPE ) XH --M>N>O priority

Written in this way No problem found so far

Other answers 3：

partition by Can't include RATE ah .

Other answers 4：

The wrong date is the exchange rate