ID_TRASY=19;DELETE FROM trasy WHERE ID_TRASY=19;com.mysql.jdbc.exceptions.jdbc4MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL
comments, shares, uploads, likes我每次都会出错
ActiveRecord::StatementInvalid: Mysql2::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL serverversion for the right syntax to use near 'DROP TABLE IF EXISTS _by_
我有一个很大的json文件(+- 50mb),我必须遍历它,处理一些文本,然后将处理后的文本插入到mysql表中。在迭代json文件时,在表中逐条插入记录会更好吗?repeat until the end of the file -> open db connection -> iterate over list -> insert record
在这种情况下,是否可以一次在数据库中插入整个列表抱歉,如果这个问题看起来很愚蠢,但我是一个初学者,在任何地方都找不到这个答案……我有100.000多条记录要插入.