[SQLAlchemy] 创建: 主键/索引/唯一约束/联合唯一约束/联合主键约束

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1. 主键

from sqlalchemy import *

test = Table(
	'test', metadata,
	Column('id', BigInteger, primary_key=True)
)

2. 索引

from sqlalchemy import *

test = Table(
	'test', metadata,
	Column('id', BigInteger, index=True)
)

3. 唯一约束

from sqlalchemy import *

test = Table(
	'test', metadata,
	Column('id', BigInteger, unique=True)
)

4. 联合唯一约束

from sqlalchemy import *

test = Table(
	'test', metadata,
	Column('id', BigInteger, primary=True),
	Column('col1', String(20)),
	Column('col2', Numeric(20, 4)),
	UniqueConstraint('col1', 'col2', name='idx_col1_col2')
)

5. 联合主键约束
   方法一:

from sqlalchemy import *

test = Table(
	'test', metadata,
	Column('id', BigInteger),
	Column('col1', String(20)),
	PrimaryKeyConstraint('id', 'col1', name='idx_id_col1')
)

方法二:

from sqlalchemy import *

test = Table(
	'test', metadata,
	Column('id', BigInteger, primary_key=True),
	Column('col1', String(20), primary_key=True),
)