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sql & sqlalchemy join多个表

it2022-05-05  138
sql & sqlalchemy join多个表 # 连接两个数据表的用法： FROM Member INNER JOIN MemberSort ON Member.MemberSort=MemberSort.MemberSort # 语法格式可以概括为： FROM 表1 INNER JOIN 表2 ON 表1.字段号=表2.字段号 # 连接三个数据表的用法： FROM (Member INNER JOIN MemberSort ON Member.MemberSort=MemberSort.MemberSort) INNER JOIN MemberLevel ON Member.MemberLevel=MemberLevel.MemberLevel # 语法格式可以概括为： FROM (表1 INNER JOIN 表2 ON 表1.字段号=表2.字段号) INNER JOIN 表3 ON 表1.字段号=表3.字段号 # 连接四个数据表的用法： FROM ((Member INNER JOIN MemberSort ON Member.MemberSort=MemberSort.MemberSort) INNER JOIN MemberLevel ON Member.MemberLevel=MemberLevel.MemberLevel) INNER JOIN MemberIdentity ON Member.MemberIdentity=MemberIdentity.MemberIdentity # 语法格式可以概括为： FROM ((表1 INNER JOIN 表2 ON 表1.字段号=表2.字段号) INNER JOIN 表3 ON 表1.字段号=表3.字段号) INNER JOIN 表4 ON Member.字段号=表4.字段号 # 连接五个数据表的用法： FROM (((Member INNER JOIN MemberSort ON Member.MemberSort=MemberSort.MemberSort) INNER JOIN MemberLevel ON Member.MemberLevel=MemberLevel.MemberLevel) INNER JOIN MemberIdentity ON Member.MemberIdentity=MemberIdentity.MemberIdentity) INNER JOIN Wedlock ON Member.Wedlock=Wedlock.Wedlock # 语法格式可以概括为： FROM (((表1 INNER JOIN 表2 ON 表1.字段号=表2.字段号) INNER JOIN 表3 ON 表1.字段号=表3.字段号) INNER JOIN 表4 ON Member.字段号=表4.字段号) INNER JOIN 表5 ON Member.字段号=表5.字段号

example

select resource_idc.uuid, resource_idc.name, resource_cabinet.uuid, resource_cabinet.alias from resource_idc INNER JOIN resource_cabinet ON resource_idc.uuid = resource_cabinet.idc_uuid order by resource_idc.uuid, resource_cabinet.alias; +--------------------------------------+--------------+--------------------------------------+---------+ | uuid | name | uuid | alias | +--------------------------------------+--------------+--------------------------------------+---------+ | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 66f03a52-7716-454c-b69b-77863b40f871 | wxxq-b2 | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | ea6c9cf9-aa67-429a-b934-c602c7ffcf47 | wxxq-b3 | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | fb6e260a-e4c0-43d4-b00a-f33d41fee0de | wxxq-b4 | | ffdba1b7-6f88-4f78-a1de-b737e682642b | 北京铜牛 | 6b54116c-c6d6-4901-85af-c956d09cfbd5 | bjtn-a1 | +--------------------------------------+--------------+--------------------------------------+---------+ select resource_idc.uuid, resource_idc.name, resource_cabinet.uuid, resource_cabinet.alias, resource_rack.uid, resource_rack.host_uuid from (resource_idc INNER JOIN resource_cabinet ON resource_idc.uuid = resource_cabinet.idc_uuid) INNER JOIN resource_rack ON resource_cabinet.uuid = resource_rack.cabinet_uuid where resource_cabinet.uuid='2c71ecba-4b14-4b94-a623-1f6154b740aa' order by resource_rack.uid; +--------------------------------------+--------------+--------------------------------------+---------+------+-----------+ | uuid | name | uuid | alias | uid | host_uuid | +--------------------------------------+--------------+--------------------------------------+---------+------+-----------+ | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 1 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 2 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 3 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 4 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 5 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 6 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 7 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 8 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 9 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 10 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 11 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 12 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 13 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 14 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 15 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 16 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 17 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 18 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 19 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 20 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 21 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 22 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 23 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 24 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 25 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 26 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 27 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 28 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 29 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 30 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 31 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 32 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 33 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 34 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 35 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 36 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 37 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 38 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 39 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 40 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 41 | NULL | | eb4fb047-a4fd-44c2-9f10-15758187417a | 无锡新区 | 2c71ecba-4b14-4b94-a623-1f6154b740aa | wxxq-b1 | 42 | NULL | +--------------------------------------+--------------+--------------------------------------+---------+------+-----------+

http://stackoverflow.com/questions/27900018/flask-sqlalchemy-query-join-relational-tables many2many queryhttp://stackoverflow.com/questions/25392770/query-many-to-many-in-sqlalchemy/

posted on 2015-10-20 12:42 北京涛子 阅读( ...) 评论( ...) 编辑 收藏

转载于:https://www.cnblogs.com/liujitao79/p/4894456.html

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