MySQL 插入错误：ER_BAD_FIELD_ERROR：“字段列表”中未知列“2525”

var convID = 2525;
var contactUsername = 'blabla';
var userId = 100;
var contactId = 200;

var sql = "INSERT INTO contacts (FK_OWNERID, FK_USERID, FC_CONTACTNAME, `CONVERSATION_ID`)
                     VALUES (" + mysql.escape(userId) + "," + mysql.escape(contactId) + "," + mysql.escape(contactUsername) + "," + convID + "),
                     (" + mysql.escape(contactId) + "," + mysql.escape(userId) + "," + mysql.escape(username) + "," + convID + ")";

`错误：ER_BAD_FIELD_ERROR：“字段列表”中的未知列“2525” CONVERSATION_ID 和 FC_CONTACTNAME 的字段均为 varchar(32)，其他 2 个字段均为 int。

这个查询有什么问题？我什至加上了反引号CONVERSATION_ID它认为convID变量是一列...

Edit:

如果我的查询就是这样，那么它就有效：

        var sql = "INSERT INTO contacts (`FK_OWNERID`, `FK_USERID`, `FC_CONTACTNAME`)
                 VALUES (" + mysql.escape(userId) + "," + mysql.escape(contactId) + "," + mysql.escape(contactUsername) + "),
                 (" + mysql.escape(contactId) + "," + mysql.escape(userId) + "," + mysql.escape(username) + ")";

make

" + convID + "

to

'" + convID + "'

很可能它是一个字符串，并且数据类型是 varchar，因此您需要用单引号引起来。