以下SQL语句可以查询特定表的所有唯一性约束的详细信息: SELECT CONSTRAINT_NAME, COLUMN_NAME FROM all_cons_columns WHERE TABLE_NAME = 'EMPLOYEES' AND CONSTRAINT_NAME IN ( SELECT CONSTRAINT_NAME FROM all_constraints WHERE TABLE_NAME = 'EMPLOYEES' AND CONSTRAINT_TYPE = 'U'); 该语句将返回所有属于EMP...
SQL 型 V4.3.0 参考指南 系统视图 Oracle 租户系统视图 字典视图 ALL_CONSTRAINTS 更新时间:2024-11-20 16:06:47 功能描述 查看用户可访问的所有表的约束信息。 功能适用性 该视图仅适用于 OceanBase 数据库 Oracle 模式。 字段说明 字段名称类型是否可以为 NULL描述 ...
SQL 型 V4.2.3 参考指南 系统视图 Oracle 租户系统视图 字典视图 ALL_CONSTRAINTS 更新时间:2024-11-20 16:06:11 编辑 功能描述 查看用户可访问的所有表的约束信息。 功能适用性 该视图仅适用于 OceanBase 数据库 Oracle 模式。 字段说明 字段名称类型是否可以为 NULL描述 ...
Learn about SQl Constraints namely Not Null, Unique, Check, Primary Key and Foriegn Key in this tutorial.
Review the other columns available insys.default_constraints Tim Ford Tim Ford is a Senior Database Administrator with MindBody in San Luis Obispo, California and is in the process of relocating west to the Pacific Northwest from Michigan. Since 2010 he’s produced Microsoft Data Pl...
Check constraints or partition function of source table ALTER TABLE with variable TableName ALTER vs UPDATE when creating a new column with default value. Alternate queries for MERGE Alternative for OR in WHERE clause Alternative for PIVOT Alternative of CURSOR in SQL to improve performance ?
https://www.runoob.com/sql/sql-wildcards.html SQL 快速参考 https://www.runoob.com/sql/sql-quickref.html SQL 视图(Views) https://www.runoob.com/sql/sql-view.html SQL 约束(Constraints) https://www.runoob.com/sql/sql-constraints.html ...
Scope of rows:all constraints Ordered byschema, table name, constraint type Sample results QueryColumnsRowsSample results Confused about your SQL Server database? You don't have to be. There's an easy way to understand the data in your databases. ...
See Also:constraintsinOracle Database SQL Language Reference LAST_CHANGE DATE When the constraint was last enabled or disabled INDEX_OWNER VARCHAR2(128) Name of the user owning the index INDEX_NAME VARCHAR2(128) Name of the index (only shown for unique and primary-key constraints) ...
有关列级 CHECK 约束,请参阅sys.check_constraints (Transact-SQL)。 is_sparsebit1 = 列为稀疏列。 有关详细信息,请参阅使用稀疏列。 is_column_setbit1 = 列为列集。 有关详细信息,请参阅使用列集。 generated_always_typetinyint适用于:SQL Server 2016 (13.x) 及更高版本、SQL 数据库。 7、8、...