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CREATE TABLE xl_join_t1 (val1 int, val2 int);
CREATE TABLE xl_join_t2 (val1 int, val2 int);
CREATE TABLE xl_join_t3 (val1 int, val2 int);
INSERT INTO xl_join_t1 VALUES (1,10),(2,20);
INSERT INTO xl_join_t2 VALUES (3,30),(4,40);
INSERT INTO xl_join_t3 VALUES (5,50),(6,60);
EXPLAIN (COSTS OFF)
SELECT * FROM xl_join_t1
INNER JOIN xl_join_t2 ON xl_join_t1.val1 = xl_join_t2.val2
INNER JOIN xl_join_t3 ON xl_join_t1.val1 = xl_join_t3.val1;
SELECT * FROM xl_join_t1
INNER JOIN xl_join_t2 ON xl_join_t1.val1 = xl_join_t2.val2
INNER JOIN xl_join_t3 ON xl_join_t1.val1 = xl_join_t3.val1;
DROP TABLE xl_join_t1;
DROP TABLE xl_join_t2;
DROP TABLE xl_join_t3;
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