[英]Copy multiple columns from a table to another table with extra columns
I want to copy records from one table to another table with extra columns. 我想将记录从一个表复制到具有额外列的另一表。
The table columns looks like this 表格列看起来像这样
Table1: A,B,C,...,X
Table2: A,B,C,...,X,Y,Z
I know that i can do it in the following way 我知道我可以通过以下方式做到
Insert into table2
Select
A,
B,
C,
...
X,
'1',
'1'
from table1
But it is a very inefficient way if the table contains lots of columns. 但是,如果表中包含许多列,这是一种非常低效的方法。 I need to do the similar procedure for several tables.
我需要对几个表执行类似的过程。 Is there a better way to do it?
有更好的方法吗?
I tried the following but it doesn't work 我尝试了以下操作,但不起作用
insert into table2 select * , '1', '1' from table1;
The thing you tried should work, just add alias. 您尝试过的东西应该可以工作,只需添加别名即可。
INSERT INTO table2
SELECT t1.*,
'1',
'1'
FROM table1 t1;
Insert into table2 ( A, B, C, ... , X, Y , Z) SELECT ( A, B, C, ... , X, '1' , '1') from table1 ; 从table1插入到table2(A,B,C,...,X,Y,Z)中SELECT(A,B,C,...,X,'1','1');
In this case Y & Z are Strings (characters). 在这种情况下,Y和Z是字符串(字符)。
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