|[WITH CHECK|WITH NOCHECK] |{ ENABLE|DISABLE }TRIGGER{ALL|<触发器名>[, n]} |DROP--【删除列或约束】 {[CONSTRAINT]<约束名>--删除某个约束 |COLUMN<column_name>}[, n]--删除某列 |{CHECK|NOCHECK}CONSTRAINT{ALL|<约束名>[, n]} |{ENABLE|DISABLE}TRIGGER{ALL|<trigger_name>[, n]} |SW...
|[WITH CHECK | WITH NOCHECK]ADD {}[, n] |DROP {[CONSTRAINT]constraint_name |COLUMNcolumn }[, n] |{CHECK|NOCHECK}CONSTRAINT {ALL|constraint_name[, n]} |{ENABLE|DISABLE}TRIGGER {ALL|trigger_name[, n]} } 在建立一个表后,在使用过程中经常会发现原来创建的表可能存在结构、约束等方面的问题。
DISABLE TRIGGER ALL' 1. --Perform delete operation on all table for cleanup 1. EXEC sp_MSforeachtable 'DELETE ?' 1. --Enable Constraints & Triggers again 1. EXEC sp_MSforeachtable 'ALTER TABLE ? CHECK CONSTRAINT ALL' 1. EXEC sp_MSforeachtable 'ALTER TABLE ? ENABLE TRIGGER ALL' ...
使用T-SQL进行数据定义 一、数据库定义 •（一）T-SQL语句创建数据库的语法格式 •CREATEDATABASE数据库名 //设置数据库的名称 •[ON //定义数据库的数据文件 •[PRIMARY]//设置主文件组 •<数据文件描述符>[,…n]//设置数据文件的属性 •[,FILEGROUP文件组名 •<数据文件描述符>[,…n]]件...
CONSTRAINT pk_ID PRIMARY KEY (ID), MRidy BIT CHECK((MRidy = 1 AND DT IS NOT NULL) OR MRidy = 0) ); The above code leads to an error,Column CHECK constraint for column 'MRidy' references another column, table 'Demo'. What must you change in the code to make it error free?
CHECK CONSTRAINT FK_EmployeeDepartmentHistory_Department_DepartmentID; GO 1. 2. 3. H. 重新生成分区索引 以下示例重新生成分区索引IX_TransactionHistory_TransactionDate的单个分区,分区编号为5。此示例假定安装了已分区索引示例。有关安装信息,请参阅Readme_PartitioningScript。
+ 1。如果newReseedValue的值小于标识列中的最大值，则将在随后对表的引用中生成错误消息2627。
CheckConstraintDefinition CheckpointStatement ChildObjectName ClassifierEndTimeOption ClassifierImportanceOption ClassifierMemberNameOption ClassifierStartTimeOption ClassifierWlmContextOption ClassifierWlmLabelOption ClassifierWorkloadGroupOption CloseCursorStatement CloseMasterKeyStatement CloseSymmetricKeyStatement CoalesceExpres...
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ExplicitVisit(CheckConstraint) ExplicitVisit(CheckpointStatement) ExplicitVisit(ChildObjectName) ExplicitVisit(CloseCursorStatement) ExplicitVisit(CloseMasterKeyStatement) ExplicitVisit(CloseSymmetricKeyStatement) ExplicitVisit(CoalesceExpression) ExplicitVisit(Column) ExplicitVisit(ColumnDefinition) Explicit...