Попробуйте
INSERT INTO table1 (field1, field2)
SELECT field1, field2 FROM table2
Я проверял это с использованием SQL Server 2005
DECLARE @Table1 TABLE(
field1 INT,
field2 INT,
field3 INT DEFAULT 1337
)
INSERT INTO @Table1 (field1,field2,field3) SELECT 1, 2, 3
DECLARE @Table2 TABLE(
field1 INT,
field2 INT
)
INSERT INTO @Table2 (field1,field2) SELECT 15, 16
INSERT INTO @Table1 (field1,field2)
SELECT field1,
field2
FROM @Table2
SELECT * FROM @Table1