[SQLAlchemy] 創建: 主鍵/索引/唯一約束/聯合唯一約束/聯合主鍵約束

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本文鏈接：https://blog.csdn.net/weixin_42902669/article/details/102666970

1. 主鍵

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. 唯一約束

from sqlalchemy import *

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

4. 聯合唯一約束

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. 聯合主鍵約束
   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),
)