1 ALTERTABLEdbo.YourTableADDIDINTIDENTITY 2 ALTERTABLEdbo.YourTableADDCONSTRAINTPK_YourTablePRIMARYKEY(ID) Or by one line ALTERTABLEdbo.YourTableADDIDINTIDENTITYCONSTRAINTPK_YourTablePRIMARYKEYCLUSTERED See-- https://stackoverflow.com/questions/4862385/sql-server-add-auto-increment-primary-key-to-exist...
FOREIGN KEY ( [DepartmentID] ) REFERENCES [dbo].[Department] ( [DepartmentID] ) GO If the table to be referenced by the FOREIGN KEY constraint already has a PRIMARY KEY and it’s not the column to be referenced by the FOREIGN KEY, you can create a UNIQUE index or UNIQUE constraint on...
2.添加字段:ALTER TABLE 表名 ADD 字段名 数据类型[属性]; 3.修改字段:ALTER TABLE 表名 CHANGE 原字段名 新字段名 数据类型[属性]; 4.删除字段:ALTER TABLE 表名 DROP 字段名; 2.添加主键 1.语法:ALTER TABLE 表名 ADD CONSTRAINT 主键名 PRIMARY KEY 表名(主键字段); 3.添加外键 1.语法:ALTER TABL...
{ <collation_name> | database_default } ] [ FILETABLE_PRIMARY_KEY_CONSTRAINT_NAME = <constraint_name> ] [ FILETABLE_STREAMID_UNIQUE_CONSTRAINT_NAME = <constraint_name> ] [ FILETABLE_FULLPATH_UNIQUE_CONSTRAINT_NAME = <constraint_name> ] [ SYSTEM_VERSIONING = ON [ ( HISTORY_TABLE = ...
... __tablename__ = "account_transaction" ... id: Mapped[int] = mapped_column(primary_key=True) ... account_id: Mapped[int] = mapped_column( ... ForeignKey("account.id", ondelete="cascade") ... ) ... description: Mapped[str] ...
(data="object")) session.add(SomeOtherObject(name="other object")) await session.commit() async def main() -> None: # an AsyncEngine, which the AsyncSession will use for connection # resources engine = create_async_engine('postgresql+asyncpg://scott:tiger@localhost/') # create a ...
{ <collation_name> | database_default } ] [ FILETABLE_PRIMARY_KEY_CONSTRAINT_NAME = <constraint_name> ] [ FILETABLE_STREAMID_UNIQUE_CONSTRAINT_NAME = <constraint_name> ] [ FILETABLE_FULLPATH_UNIQUE_CONSTRAINT_NAME = <constraint_name> ] [ SYSTEM_VERSIONING = ON [ ( HISTORY_TABLE = ...
[ PARTITION ] source_partition_number_expression ] TO target_table [ PARTITION target_partition_number_expression ] [ WITH ( <low_priority_lock_wait> ) ] } [ ; ] -- ALTER TABLE options < table_constraint > ::= [ CONSTRAINT constraint_name ] { {PRIMARY KEY | UNIQUE } { NONCLUSTERED ...
ALTER TABLE table-name 1ADDCOLUMNcolumn-definitionALTERCOLUMNcolumn-alterationRENAME COLUMNsource-column-nameTOtarget-column-nameDROPCOLUMNcolumn-nameRESTRICTADD PERIODFORperiod-definitionADDunique-constraintreferential-constraintcheck-constraint4DROPRPRIMARY KEYUNIQUEFOREIGN KEYCHECKCONSTRAINTconstraint-nameADD PARTITIO...
To protect the key material of the symmetric key, database master key and service master key, SQL Server and Azure SQL stores the key material in encrypted form. The encryption uses OAEP-256 padding mode. In the dm_database_encryption_keys, the encryptor_type will be displayed as CERTIFICATE...