我有一个查询要在表中插入一行,该表有一个名为 ID 的字段,该字段使用列上的 AUTO_INCREMENT 填充。我需要为下一个功能获取这个值,但是当我运行以下命令时,即使实际值不是 0,它也总是返回 0:
MySqlCommand comm = connect.CreateCommand();
comm.CommandText = insertInvoice;
comm.CommandText += "\'" + invoiceDate.ToString("yyyy:MM:dd hh:mm:ss") + "\', " + bookFee + ", " + adminFee + ", " + totalFee + ", " + customerID + ")";
int id = Convert.ToInt32(comm.ExecuteScalar());
根据我的理解,这应该返回 ID 列,但它每次只返回 0。有任何想法吗?
编辑:
当我运行时:
"INSERT INTO INVOICE (INVOICE_DATE, BOOK_FEE, ADMIN_FEE, TOTAL_FEE, CUSTOMER_ID) VALUES ('2009:01:01 10:21:12', 50, 7, 57, 2134);last_insert_id();"
我得到:
{"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 'last_insert_id()' at line 1"}