Question

PreparedStatement amovie = con.prepareStatement("INSERT INTO actor_movie(actor_ID, movie_ID)"+ "select actor_ID from actor" + "where actor.surname = 'Depp', select movie_ID from movie where movie.title LIKE 'Caribbean%'");

有人可以告诉我此查询出了什么问题吗？我挖了互联网，但找不到解决方法。

错误消息：

Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ', select movie_ID from movie where title LIKE 'Caribbean%'' at line 1

Answer 1

注意字符串之间需要连接的空格

var pauseToken = new PauseToken();

//Use pauseToken on all threads that consume a lot of CPU

Task.Run(async () => {
 while (true) {
  await Task.Delay(250); //run
  pauseToken.Pause();
  await Task.Delay(750); //pause
  pauseToken.Resume();
 }
});

Answer 2

您有语法错误，因为您忘记了VALUES，并在括号SELECT中加上了括号。
更改为此：

PreparedStatement amovie = con.prepareStatement(
    "INSERT INTO actor_movie(actor_ID, movie_ID) VALUES ((select actor_ID from actor where actor.surname = 'Depp'), (select movie_ID from movie where movie.title LIKE 'Caribbean%'))");

带子查询的预处理语句给出语法错误

2 个答案: