alter table sys_user_c2 add constraint ck_salary_new check(Salary>0); 1. 2. 3. 4. 5. 6. 7. 8. 3、禁用检查约束 alter table sys_user_c2 disable constraint ck_salary_new; 1. 2. select constraint_name,constraint_type,status from user_constraints where table_name='SYS_USER_C2'; 1....
禁用唯一索引时,还将禁用PRIMARY KEY约束或UNIQUE约束及引用其他表中的索引列的所有FOREIGN KEY约束。 禁用聚集索引时,还将禁用基础表的所有传入和传出的FOREIGN KEY约束。 索引处于禁用状态时,会在警告消息中列出约束名称。 重新生成索引后,必须使用ALTER TABLE CHECK CONSTRAINT语句手动启用所有约束。
DROPCONSTRAINT constraint_name(删除约束) DISABLECONSTRAINT constraint_name;(启用约束) ENABLECONSTRAINT constraint_name;(禁用约束)ALTER TABLE table_name RENAMECONSTRAINT old_constraint_nameTOnew_constraint_name(修改约束名) select'alter table'||table_name||'disable constraint'||constraint_name||';'from u...
在脚本的ALTER TABLE ... ADD CONSTRAINT部分,修改新的外键约束并指定 NOT FOR REPLICATION 选项。 例如: SQL ALTERTABLE[Sales].[SalesTerritoryHistory]DROPCONSTRAINT[FK_SalesTerritoryHistory_SalesPerson_BusinessEntityID]GOALTERTABLE[Sales].[SalesTerritoryHistory]WITHCHECKADDCONSTRAINT[FK_SalesTerrit...
This article describes how to disable an index or constraints in SQL Server by using SQL Server Management Studio or Transact-SQL. Disabling an index prevents user access to the index, and for clustered indexes to the underlying table data. The index definition remains in metadata, and index st...
Use SQL Server Management Studio Disable an index In Object Explorer, select the plus sign to expand the database that contains the table on which you want to disable an index. Select the plus sign to expand theTablesfolder. Select the plus sign to expand the table on which you want to ...
ADD CONSTRAINT constraint_name CHECK (column_name condition) [DISABLE]; 1. 2. 其中,DISABLE关键之是可选项。如果使用了DISABLE关键字,当CHECK约束被创建后,CHECK约束的限制条件不会生效。 示例: --创建check约束 alter table tb_supplier add constraint check_tb_supplier ...
Use SQL Server Management Studio Disable an index In Object Explorer, select the plus sign to expand the database that contains the table on which you want to disable an index. Select the plus sign to expand theTablesfolder. Select the plus sign to expand the table on which you want to ...
Use SQL Server Management StudioTo disable a foreign key constraint for replicationIn Object Explorer, expand the table with the foreign key constraint you want to modify, and then expand the Keys folder. Right-click the foreign key constraint and then select Modify. In the Foreign Key ...
適用於:SQL ServerAzure SQL 資料庫Azure SQL 受控執行個體Microsoft Fabric 中的 SQL 資料庫 這篇文章說明如何使用 SQL Server Management Studio 或 Transact-SQL 停用 SQL Server 的索引或限制。 停用索引會防止使用者存取索引,而停用叢集索引則會防止存取基礎資料表資料。 索引定義會保留在中繼資料內,而索引統計...