DefaultConstraint 方法 SQL SQL Server 2012 DefaultConstraint 类 DefaultConstraint 方法 C# 使用英语阅读添加 打印 TwitterLinkedInFacebook电子邮件 项目 2013/04/26 本文内容 语法 示例 请参阅 Renames the default constraint. 命名空间:Microsoft.SqlServer.Management.Smo ...
C# publicvoidRename(stringnewname); Parameters newname String New default constraint name Implements Rename(String) Applies to ProductVersions Microsoft.SqlServer.SqlManagementObjects150.18208.0, 160.2004021.0 In this article Definition Applies to
如果要重新命名的對像是條件約束,object_name格式必須是schema.constraint。只有在指定限定的物件時,才需要引號。 如果提供完整名稱,包括資料庫名稱,資料庫名稱必須是目前資料庫的名稱。 object_name為 nvarchar(776),沒有預設值。[ @newname = ] 'new_name'指定之物件的新名稱。 new_name必須是一部分的名稱,...
CK_Employee_VacationHours HumanResources CHECK_CONSTRAINT CK_Employee_SickLeaveHours HumanResources CHECK_CONSTRAINT (7 row(s) affected) F. 重命名统计信息 以下示例创建一contactMail1个名为统计信息的对象,然后使用 将统计信息重命名为NewContactsp_rename>。 重命名统计信息时,必须以“schema.table.statistics...
SQL Server Management Studio Transact-SQL Before You Begin Limitations and Restrictions When you create a PRIMARY KEY or UNIQUE constraint on a table, an index with the same name as the constraint is automatically created for the table. Because index names must be unique within the table, you ...
SQL Server有两种类型的文件组:· 主文件组:包含主数据文件和任何没有明确分配给其他文件组的其他文件。系统表的所有页均分配在主文件组中。·用户定义文件组:用户定义文件组是通过在CREATE DATABASE或ALTER DATABASE语句中使用FILEGROUP关键字指定的任何文件组。
If the object to be renamed is a constraint, object_name must be in the form schema.constraint. Quotation marks are only necessary if a qualified object is specified. If a fully qualified name, including a database name, is provided, the database name must be the name of the current ...
(10) DEFAULT NULL, `last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`address_id`), KEY `idx_fk_city_id` (`city_id`), CONSTRAINT `fk_address_city` FOREIGN KEY (`city_id`) REFERENCES `city` (`city_id`) ON UPDATE CASCADE ) ...
t3 Create Table:CREATE TABLE `t3` ( `i1` int(11) DEFAULT NULL, `i2` int(11) DEFAULT NULL, CONSTRAINT `t3_chk_1` CHECK ((`i1` > 0)), CONSTRAINT `t3_chk_2` CHECK ((`i2` < 0)) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci1 row in set (0.01 ...
I do not want to fix this glitch by making the comparison binary, because then the FOREIGN KEY system tables should be rebuilt in an upgrade 4.0.22 -> 4.0.23. I also fixed a hang when a RENAME or ALTER failed because of colliding constraint names. Regards, Heikki...