插入组合(值和选择)

Question

有几种方法可以将数据插入表中:

insert into MyTable (ColA, ColB, ColC) values ('A', 'B', 'C')

insert into MyTable (ColA, ColB, ColC) select  colAA, colBB, colCC from MyTable2

有没有办法使用,insert into MyTable (ColA, ColB, ColC) select colAA, colBB, colCC from MyTable2但不是插入例如colAA值到colA我woulkd喜欢插入总是1.

感谢帮助

Answer 1

只需在SELECT列表中添加一个常量即可

INSERT INTO MyTable
            (ColA,
             ColB,
             ColC)
SELECT 1,
       colBB,
       colCC
FROM   MyTable2