SQL-query rank function

Question

 

 bwlow is my query 

 

with A as (select *,RANK() over(partition by ClientID order by ContactDateTime desc) as RNK from vwREClient)select * from A

where callForActivityID=1 and ContactDirectionID > 0

 i am getting below out put from where these 13 and 20 come i didnt understand please help me

 

 

RNK

1

2

1

1

13

20

1

1

5

6

1

2

3

2

1

12

1

8

2

2

5

7

1

4

10

3

4

1

5

6

2

1

4

2

9

18

10

11

12

1

1

2

8

7

2

1

2

1

1

2

1

1

1

1

1

1

2

1

1

1

7

1

1

1

1

5

3

4

2

2

4

2

11

12

13

12

5

2

13

14

2

2

4

7

7

3

4

5

1

6

9

10

3

1

8

1

3

1

1

4

1

4

1

13

14

1

2

3

3

1

3

2

14

15

5

3

5

1

6

8

1

5

5

4

1

1

1

2

4

2

6

7

9

2

3

1

2

3

4

1

6

7

16

2

15

7

22

3

7

8

13

1

2

17

3

3

1

14

13

1

2

14

3

8

2

4

5

6

9

10

3

8

12

13

1

2

9

9

10

2

5

12

3

4

5

6

5

8

1

18

1

5

6

7

3

13

14

4

4

6

7

5

6

7

8

1

1

1

2

3

1

1

9

7