ALTER TABLE dbo.doc_exb DROP COLUMN column_b ; GO -- Remove multiple columns. ALTER TABLE dbo.doc_exb DROP COLUMN column_c, column_d; B. 制約と列を削除する 最初の例では、テーブルから UNIQUE 制約を削除します。 2 番目の例では、2
In SQL Server (starting with SQL Server 2012 (11.x)), in Azure SQL Database and in Azure SQL Managed Instance, when a table contains varchar(max) or varbinary(max) columns, a clustered index containing other columns can be built or rebuilt using the ONLINE option. For more information, ...
TableReferenceWithAliasAndColumns TableReplicateDistributionPolicy TableRoundRobinDistributionPolicy TableSampleClause TableSampleClauseOption TableSwitchOption TableSwitchOptionKind TableValuedFunctionReturnType TableXmlCompressionOption TargetDeclaration TargetRecoveryTimeDatabaseOption TemporalClause TemporalClauseType TemporalR...
In SQL Server (starting with SQL Server 2012 (11.x)), in Azure SQL Database and in Azure SQL Managed Instance, when a table contains varchar(max) or varbinary(max) columns, a clustered index containing other columns can be built or rebuilt using the ONLINE option. For more information, ...
Table-valued functions that return tables with character columns with collations inherited from the default database collation Dependency information for non-schema-bound entities is automatically updated when the database collation is changed. Changing the database collation doesn't create duplicates among...
Applies to: SQL Server (Starting with SQL Server 2012 (11.x)) Specifies the default language value for full-text indexed columns. Important This option is allowable only when CONTAINMENT has been set to PARTIAL. If CONTAINMENT is set to NONE, errors occur. DEFAULT_LANGUAGE Applies to: SQL ...
可使用 sys.columns (Transact-SQL)、sys.column_encryption_keys (Transact-SQL) 和sys.column_encryption_key_values (Transact-SQL) 查看列加密密钥的相关信息。 权限 需要对数据库具有 ALTER ANY COLUMN ENCRYPTION KEY 权限。 示例 A. 添加列加密密钥值 下面的示例更改名为 MyCEK 的列加密密钥。 SQL 复制 ...
Applies to: SQL Server (Starting with SQL Server 2012 (11.x)) Specifies the default language value for full-text indexed columns. Important This option is allowable only when CONTAINMENT has been set to PARTIAL. If CONTAINMENT is set to NONE, errors occur. DEFAULT_LANGUAGE Applies to: SQL ...
Existing columns are not affected. NLS_NCHAR_CONV_EXCP Parameter type String Syntax NLS_NCHAR_CONV_EXCP = {TRUE | FALSE} Default value FALSE Parameter class Dynamic: ALTER SESSION, ALTER SYSTEM NLS_NCHAR_CONV_EXCP determines whether data loss during an implicit or explicit ...
In addition, the length of the constant value cannot be greater than the INLINE LENGTH attribute for LOB columns. SESSION_USER or USER Specifies the value of the SESSION_USER (USER) special register at the time of an SQL data change statement or LOAD, as the default for the column. If ...