mysql合并两个表（如果不存在）

Question

I want to merge two tables, but not the duplicate entries with similar id field.

But I get error after:

INSERT INTO table1 (id, name) 
      SELECT id, name FROM table2 WHERE table2.id NOT_IN (SELECT id FROM table1);

Answer 1

You have to change NOT_IN in NOT IN , as this is the correct synthax

INSERT INTO table1 (id, name) 
SELECT id, name FROM table2 WHERE table2.id NOT IN(SELECT id FROM table1);