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-- Hint: use Ctrl+Enter for SQL autocomplete CREATE TABLE R (a INTEGER, b INTEGER); CREATE TABLE S (c INTEGER, d INTEGER); INSERT INTO R VALUES (2, 4); INSERT INTO R VALUES (3, NULL); INSERT INTO R VALUES (4, 6); INSERT INTO R VALUES (5, 7); INSERT INTO S VALUES (1, 10); INSERT INTO S VALUES (2, NULL); INSERT INTO S VALUES (3, 30); INSERT INTO S VALUES (4, 40); SELECT * FROM R; SELECT * FROM S; UPDATE R SET a = b + d FROM R JOIN S ON a = c WHERE d > 20;
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