syntaxsql Kopieren ALTER TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } { ALTER COLUMN column_name { [ type_schema_name. ] type_name [ ( { precision [ , scale ] | max | xml_schema_collection } ) ] [ COLLATE collation_name ] [ NULL | NOT...
ALTERTABLEtable_name ADDcolumn_name datatype; The following SQL adds an "Email" column to the "Customers" table: ExampleGet your own SQL Server ALTERTABLECustomers ADDEmail varchar(255); ALTER TABLE - DROP COLUMN To delete a column in a table, use the following syntax (notice that some da...
visitAddColumns方法是ANTLR插件自动为我们生成的方法,定义在SparkSqlAstBuilder的父类AstBuilder中(AST,Abstract Syntax Tree ,抽象语法树),这个方法用来处理我们在SqlBase.g4中定义的| ALTER TABLE tableIdentifier ADD COLUMNS ('(' columns=colTypeList ')')? #addColumns,我们这里重载了visitAddColumns方法用来提取表...
syntaxsql Copier ALTER TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } { ALTER COLUMN column_name { [ type_schema_name. ] type_name [ ( { precision [ , scale ] } ) ] [ COLLATE collation_name ] [ NULL | NOT NULL ] } | ALTER INDEX index...
public boolean supportsAlterTableWithAddColumn() 返回值 如果支持,则值为 true。 否则为 false。 例外 SQLServerException 备注 此supportsAlterTableWithAddColumn 方法是由 java.sql.DatabaseMetaData 接口中的 supportsAlterTableWithAddColumn 方法指定的。 另请参阅 SQLServerDatabaseMetaData 方法 SQLServerDatabase...
SQL Server 语法 syntaxsql 复制 -- Syntax for SQL Server ALTER USER user_name WITH <set_item> [ ,...n ] [;] <set_item> ::= NAME = new_user_name | DEFAULT_SCHEMA = { schema_name | NULL } | LOGIN = login_name | PASSWORD = 'password' [ OLD_PASSWORD = 'oldpassword' ] |...
Transact-SQL 语法约定 备注 Microsoft Entra ID 以前称为 Azure Active Directory (Azure AD)。 语法 syntaxsql 复制 -- Syntax for SQL Server ALTER AUTHORIZATION ON [ <class_type>:: ] entity_name TO { principal_name | SCHEMA OWNER } [;] <class_type> ::= { OBJECT | ASSEMBLY | ASYMMETRIC...
This syntax is not supported by serverless SQL pool in Azure Synapse Analytics. Arguments <class_type> Is the securable class of the entity for which the owner is being changed. OBJECT is the default. Expand table ClassProduct OBJECT Applies to: SQL Server 2008 (10.0.x) and later, Azure...
Groups of ALTER TABLE syntax: alter_table_properties::= column_clauses::= constraint_clauses::= alter_table_partitioning::= alter_external_table_clauses::= move_table_clause::= enable_disable_clause::= After each clause you will find links to its component subclauses. ...
For all installations of SQL Server, the default compatibility level is associated with the version of the Database Engine, as seen inthis table. For new development work, always plan to certify applications on the latest database compatibility level. ...