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SQL social network practice by Han Wang 20200720 - 2

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   id name grade
1 1247 Alexis 11
2 1501 Jessica 11
3 1510 Jordan 9
4 1709 Cassandra 9
5 1782 Andrew 10
   likes grade liked grade
1 John 12 Haley 10
2 John 12 Brittany 10
   id1 id2
1 1689 1709
2 1501 1934
   id name grade
1 1510 Jordan 9
2 1661 Logan 12
   id1 id2
1 1247 1468
2 1641 1468
3 1316 1304
4 1101 1381
   id name grade
1 1510 Jordan 9
2 1641 Brittany 10
3 1911 Gabriel 11
4 1661 Logan 12
   name grade
1 Cassandra 9
2 Kris 10