For more information, see SET QUOTED_IDENTIFIER (Transact-SQL). FOREIGN KEY REFERENCES Is a constraint that provides referential integrity for the data in the column. FOREIGN KEY constraints require that each value in the column exist in the specified column in the referenced table. schema_name ...
sys.objects (Transact-SQL) sys.types (Transact-SQL) sys.check_constraints (Transact-SQL) sys.key_constraints (Transact-SQL) sys.foreign_keys (Transact-SQL) 意見反應 此頁面對您有幫助嗎? YesNo 提供產品意見反應|在 Microsoft Q&A 上取得說明...
Applies to: SQL Server 2016 (13.x) and later, SQL Database. Must be 'AEAD_AES_256_CBC_HMAC_SHA_256'. For more information including feature constraints, see Always Encrypted (Database Engine). ADD MASKED WITH ( FUNCTION = ' mask_function ') Applies to: SQL Server 2016 (13.x) and...
但是如果表上需要添加Constraints或者工作负载仍然需要B-tree形式的非聚集索引,那么我们还是只能考虑使用非聚集列存储索引。 语句的执行上有以下改进 基于矢量的计算方式得到改 支持更多的语法 所有的join方式(包括OUTER, HASH, SEMI (NOT IN, IN) UNION ALL Scalar aggregates “Mixed mode” plans 对bitmap和spill...
Documenting WITH FILLFACTOR =fillfactoras the only index option that applies to PRIMARY KEY or UNIQUE constraints is maintained for backward compatibility, but will not be documented in this manner in future releases. Other index options can be specified in theindex_option (Transact-SQL)clause of ...
Is a constraint that provides referential integrity for the data in the column. FOREIGN KEY constraints require that each value in the column exist in the specified column in the referenced table. schema_name Is the name of the schema to which the table referenced by the FOREIGN KEY constraint...
I understand the size/storage constraints of MySQL TEXT and MEDIUMTEXT fields, but I just wanted to make absolutely sure (before I sign off on a change) that I'm not looking at any adverse effects fro... Change the declaring class of a method with Javassist?
The Database Engine does not enforce an order for specifying DEFAULT, IDENTITY, ROWGUIDCOL, or column constraints in a column definition. Examples For examples, see ALTER TABLE (Transact-SQL). See Also Reference ALTER TABLE (Transact-SQL) Concepts Controlling Constraints, Identities, and Triggers...
Typically, you apply the unique constraints to columns when you create the table using the inline constraint syntax as follows: CREATE TABLE table_name ( ... column_name data_type UNIQUE ... ); Code language: SQL (Structured Query Language) (sql) ...
CONSTRAINT_NAME nvarchar(128) 约束名称。 请参阅 参考 系统视图 (Transact-SQL) 信息架构视图 (Transact-SQL) sys.columns (Transact-SQL) sys.objects (Transact-SQL) sys.types (Transact-SQL) sys.check_constraints (Transact-SQL) sys.key_constraints (Transact-SQL) sys.foreign_keys (Transact-SQL)中文...