MySQL + JAVA-无法将表格插入另一个

Question

I can't seem to insert my old table into the new table. Very weird

Code:

INSERT INTO 'newhawk_playewadwds' (`player_id`,'player') SELECT `player_id`,'player' FROM 'hawk_playewadwds';

Error:

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You
have an error in your SQL syntax; check the manual that corresponds to your MySQ
L server version for the right syntax to use near ''newhawk_playewadwds' (`playe
r_id`,'player') SELECT `player_id`,'player' FROM 'h' at line 1

Extra info:

Both tables exist and have slightly diffrent column structors (One has a varchar(50), while the other doesn't). Which is why i included the direct columns in the statement.

Answer 1

Quotes are delimiters for strings. Use backticks to escape column and table names, not quotes.

INSERT INTO `newhawk_playewadwds` (`player_id`,`player`) 
SELECT `player_id`,`player` 
FROM `hawk_playewadwds`;

But you actually only need to escape the reserved words .

Answer 2

Try to replace ' char with table names and for column player as below

INSERT INTO `newhawk_playewadwds` (`player_id`,`player`) 
SELECT `player_id`,`player` 
FROM `hawk_playewadwds`;

Answer 3

Use backticks across the query. You are using backticks and single quotes. Either use backticks or remove the single quotes:

-- This will work (Backticks only)
INSERT INTO `newhawk_playewadwds` (`player_id`,`player`) 
SELECT `player_id`,`player` 
FROM `hawk_playewadwds`;

-- This will also work (No backticks and no single quotes)
INSERT INTO newhawk_playewadwds (player_id,player) 
SELECT player_id,player 
FROM hawk_playewadwds;

Another thing, as you mentioned column structures are different,

1. If newhawk_playewadwds has column > 50, and hawk_playewadwds has < 50, It shouldn't be a problem

2. If hawk_playewadwds' has > 50 and newhawk_playewadwds` has <50, then do either of the following:

   1. Increase the size of the new table newhawk_playewadwds to same size of hawk_playewadwds

   2. Use Substring in select as:

       INSERT INTO `newhawk_playewadwds` (`player_id`,`player`) SELECT `player_id`,SUBSTRING(`player` ,1,50) FROM `hawk_playewadwds`;