[英]Cloning a table MYSQL and adding a unique ID?
The code I have been using to clone a table is as follows: 我一直在用来克隆表的代码如下:
CREATE TABLE new_table LIKE original_table;
INSERT INTO new_table SELECT * FROM original_table;
However, there is a problem that in the new table I want a unique, auto incrementing id column. 但是,存在一个问题,在新表中,我需要一个唯一的自动递增的id列。
But I run into the column count doesn't match value count at row 1 error
. 但是我遇到了column count doesn't match value count at row 1 error
。
I know that you can use the DEFAULT keyword
, or leave the id out and it will auto increment but I am unsure as how the query should be structured? 我知道您可以使用DEFAULT keyword
,也可以不使用ID,它会自动递增,但是我不确定查询的结构如何?
After you added the PK auto increment column (assuming its the first column) try this: 在添加PK自动增量列(假设其为第一列)之后,请尝试以下操作:
INSERT INTO new_table
SELECT NULL,[all column names from original_table] FROM original_table;
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