insert into B(字段列表),select 字段列表 from A where not exists(select * from B where a.keycol1 = b.keycol1)insert into B(字段列表),select 字段列表 from A wh
insert into B(字段列表),select 字段列表 from A where not exists(select * from B where a.keycol1 = b.keycol1)insert into B(字段列表),select 字段列表 from A wh