MySQL错误代码1048表示”Column ‘column_name’ cannot be null”,这是一个DML(数据操作语言)错误,通常发生在尝试插入或更新一个不允许NULL值的列,但提供的值却是NULL。要解决这个问题,需要确保为该列提供一个非NULL的值。 在MySQL数据库中,数据操作语言(DML)是用于处理和操纵数据记录的一组SQL(结构化查询语言)...
当你插入数据的时候 id获取到的是可能是null 你打个断点 跟踪下，看看是不是null
p.Add("@Age", model.Age); p.Add("@Class", model.Class); connection.Query("organizationmembers_insert", p, commandType: CommandType.StoredProcedure);//this is where it throws an error saying the name column //cannot be null model.Id = connection.Query<int>("dbo.SpGetId").First(); ...
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sqlalchemy.exc.IntegrityError: (pymysql.err.IntegrityError) (1048, "Column 'name' cannot be null") [SQL: INSERT INTO user (name, tel, my_age) VALUES (%(name)s, %(tel)s, %(my_age)s)] [parameters: {'name': None, 'tel': '10086', 'my_age': 20}] ...
Age calculation in report builder query Aggregated CASE expressions versus the PIVOT operator… Is one better than the other? Aging Report SQL Query Alias all columns in a given table Alias column with variable value in SQL Script All MonthNames and Month numbers in sql server All queries combine...
...2、JSON_EXTRACT 查询 JSON_EXTRACT 这个函数主要用作精确匹配,如查找 user_info中age=21 的记录或者查询 name=’wangwei’的记录,或者 name like...在值为数组的时候,数组的起始位置值为0,同时,MySQL 在5.5.9的版本增加了->,提供了等价于 JSON_EXTRACT另外一种写: SELECT * FROM json_test WHERE ...
(20) 添加表字段: alter table emp addcolumn...age int(3) 删除表字段: alter table emp dropcolumnage 字段改名; alter table emp change age age1 int(4) 修改表名:...database test2 character set utf8 时区相关 查看当前时区(UTC为世界统一时间,中国为UTC+8): show variables like "%time_zone%...
An Integration Services class cannot be found. Make sure that Integration Services is correctly installed on the computer that is running the application. Also, make sure that the 64-bit version of Integration Services is installed if you are running a 64 An OLE DB error has occurred. Error ...
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