ALTER TABLE ADD COLUMN和自动列列表中

Question

我期待一个新列添加到使用提供here和here

本质的建议表，我想（fields_in_orig_table）将自动填充，并不必手动输入（有许多列和表，这会更改表）：

CREATE TABLE games_new LIKE games_orig; 
ALTER TABLE games_new ADD COLUMN location varchar(256); 
INSERT INTO games_new (fields_in_orig_table) SELECT * FROM games_orig; 
RENAME TABLE games_orig TO games_old, games_new TO games_orig; 
DROP TABLE games_old; 

我的想法去解决此问题：

CREATE TABLE games_new LIKE games_orig; 
ALTER TABLE games_new ADD COLUMN version varchar(256); 
INSERT INTO games_new 

      (SELECT CONCAT(GROUP_CONCAT(column_name ORDER BY ordinal_position 
      SEPARATOR " , "), " ") AS columns 
      FROM information_schema.columns 
      WHERE table_schema = 'games' AND table_name = 'games_orig') 

SELECT * FROM games_orig; 
RENAME TABLE games_orig TO games_old, games_new TO games_orig; 
DROP TABLE games_old; 

这给我语法错误（靠近Select concat ....）。

原来的语法来获得逗号分隔的列清单是：

SELECT CONCAT("'", GROUP_CONCAT(column_name ORDER BY ordinal_position SEPARATOR "', '"), "'") AS columns 
FROM information_schema.columns 
WHERE table_schema = 'db_name' AND table_name = 'tbl_name' 

在我的询问，我已经删除了额外的引号，因为我认为我的查询不需要引号作为列上市的一部分。

我在这里做错了什么？谁可以帮忙？

Answer 1

INSERT INTO games_new 

VALUES (SELECT CONCAT.... 

Answer 2

当在表中插入值使用INSERT INTO tablename VALUES (fields)代替INSERT INTO tablename SET(fields)。

CREATE TABLE games_new LIKE games_orig; 
ALTER TABLE games_new ADD COLUMN version varchar(256); 
INSERT INTO games_new 
      VALUES 
      (SELECT CONCAT(GROUP_CONCAT(column_name ORDER BY ordinal_position 
      SEPARATOR ' , '), ' ') AS columns 
      FROM information_schema.columns 
      WHERE table_schema = 'games' AND table_name = 'games_orig') 

SELECT * FROM games_orig; 
RENAME TABLE games_orig TO games_old, games_new TO games_orig; 
DROP TABLE games_old; 

Answer 3

您还没有指定你想要的列插入，因为你的嵌套查询只返回1个值

INSERT INTO games_new (column_name_u_want_to_insert_value_into) 
SELECT cast(concat(group_concat(column_name ORDER BY ordinal_position SEPARATOR " , "), " ") AS CHAR) AS columns 
FROM  information_schema.columns 
WHERE table_name = 'games_orig'; 

此外，如果你正在运行的所有语句一起，加上分号（ ;）插入查询以及