一个逗号带来的错误

sqlstr ="CREATE TABLE IF NOT EXISTS user_info";
 sqlstr+="(";
 sqlstr+="user_id INT UNSIGNED NOT NULL  PRIMARY KEY COMMENT 'Unique User ID',";
 sqlstr+="user_name VARCHAR(100) CHARACTER SET gb2312 COLLATE gb2312_chinese_ci NULL COMMENT 'Name Of User',";
 sqlstr+="user_second_sum INT UNSIGNED NOT NULL DEFAULT 0 COMMENT 'The Summation Of Using Time'";
 sqlstr+=");"; 

------------------------------------

上面是源程序的建表代码，下面是我参照上面写的，老是提示建表失败，最后发现时一个逗号惹得祸。嗨！

 'Name Of User',";
就是' 后面的那个逗号，如果最后一个字段结束后，就没有逗号了，对头！

------------------------------------
 sqlstr ="CREATE TABLE IF NOT EXISTS user_wade";
 sqlstr+="(";
 sqlstr+="ID INT UNSIGNED NOT NULL PRIMARY KEY COMMENT 'Unique User ID',";
 sqlstr+="NAME VARCHAR(100) CHARACTER SET gb2312 COLLATE gb2312_chinese_ci NULL COMMENT 'Name Of User'";
 sqlstr+=");";