compound_three_primary_keys
1 row where pk1 = "b", pk2 = "a" and pk3 = "k"
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CREATE TABLE compound_three_primary_keys ( pk1 varchar(30), pk2 varchar(30), pk3 varchar(30), content text, PRIMARY KEY (pk1, pk2, pk3) ); CREATE INDEX idx_compound_three_primary_keys_content ON compound_three_primary_keys(content);