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SQL 2022-03-05 12:00:02
difference between left join and left outer join in postgresql
-- LEFT OUTER JOIN is equivalent to LEFT JOIN -- b.VALUE1 is null when ID not in table2 (idem for c.VALUE1 in table3) SELECT a.ID, a.NAME, b.VALUE1, c.VALUE1 FROM table1 a LEFT OUTER JOIN table2 b ON a.ID = b.ID LEFT OUTER JOIN table3 c ON a.ID = c.I... Add solution -
SQL 2022-02-06 11:20:10
sql left join 2 tables
-- LEFT OUTER JOIN is equivalent to LEFT JOIN -- b.VALUE1 is null when ID not in table2 (idem for c.VALUE1 in table3) SELECT a.ID, a.NAME, b.VALUE1, c.VALUE1 FROM table1 a LEFT OUTER JOIN table2 b ON a.ID = b.ID LEFT OUTER JOIN table3 c ON a.ID = c.I... Add solution -
SQL 2022-01-31 22:51:47
left join in sql with 3 tables
-- LEFT OUTER JOIN is equivalent to LEFT JOIN -- b.VALUE1 is null when ID not in table2 (idem for c.VALUE1 in table3) SELECT a.ID, a.NAME, b.VALUE1, c.VALUE1 FROM table1 a LEFT OUTER JOIN table2 b ON a.ID = b.ID LEFT OUTER JOIN table3 c ON a.ID = c.I... Add solution -
SQL 2022-01-29 08:20:11
update multiple columns in sql
-- Oracle UPDATE table2 t2 SET (VALUE1, VALUE2) = (SELECT COL1 AS VALUE1, COL1 AS VALUE2 FROM table1 t1 WHERE t1.ID = t2.ID); -- SQL Server UPDATE table2 t2 SET t2.VALUE1 = t1.COL1, t2.VALUE2 = t1.COL2 FROM table1 t1 INNER JOIN t2 ON t1.ID = ... Add solution