demo, MySQL - rextester

demo

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Initial

1
Initial


  
id
cat
val

1
1
100
20

2
2
100
40

3
3
200
-50

4
4
200
0


  
should update

1
should update


  
id
cat
val

1
1
100
1000

2
2
100
40

3
3
200
-50

4
4
200
0


  
should insert

1
should insert


  
id
cat
val

1
1
100
1000

2
2
100
40

3
3
200
-50

4
4
200
0

5
6
600
6000

λ

                                      .NET NoSQL database for rapid development