{"id":2892,"date":"2021-07-21T07:51:57","date_gmt":"2021-07-21T07:51:57","guid":{"rendered":"https:\/\/www.bearloga.space\/?page_id=2892"},"modified":"2021-07-21T07:51:57","modified_gmt":"2021-07-21T07:51:57","slug":"yadro-sqlalchemy-ispolzovanie-neskolkih-tablicz","status":"publish","type":"page","link":"https:\/\/www.bearloga.space\/uk\/yadro-sqlalchemy-ispolzovanie-neskolkih-tablicz\/","title":{"rendered":"\u042f\u0434\u0440\u043e SQLAlchemy \u2014 \u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u0442\u0430\u0431\u043b\u0438\u0446"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u041e\u0434\u043d\u043e\u0439 \u0438\u0437 \u0432\u0430\u0436\u043d\u044b\u0445 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0435\u0439 \u0420\u0421\u0423\u0411\u0414 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u0441\u0432\u044f\u0437\u0438 \u043c\u0435\u0436\u0434\u0443 \u0442\u0430\u0431\u043b\u0438\u0446\u0430\u043c\u0438.&nbsp;\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 SQL, \u0442\u0430\u043a\u0438\u0435 \u043a\u0430\u043a SELECT, UPDATE \u0438 DELETE, \u043c\u043e\u0433\u0443\u0442 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c\u0441\u044f \u043d\u0430\u0434 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u043c\u0438 \u0442\u0430\u0431\u043b\u0438\u0446\u0430\u043c\u0438.&nbsp;\u0412 \u044d\u0442\u043e\u043c \u0440\u0430\u0437\u0434\u0435\u043b\u0435 \u043e\u043f\u0438\u0441\u044b\u0432\u0430\u044e\u0442\u0441\u044f \u044d\u0442\u0438 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c SQLAlchemy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0414\u043b\u044f \u044d\u0442\u043e\u0433\u043e \u0432 \u043d\u0430\u0448\u0435\u0439 \u0431\u0430\u0437\u0435 \u0434\u0430\u043d\u043d\u044b\u0445 SQLite (College.db) \u0441\u043e\u0437\u0434\u0430\u044e\u0442\u0441\u044f \u0434\u0432\u0435 \u0442\u0430\u0431\u043b\u0438\u0446\u044b.&nbsp;\u0422\u0430\u0431\u043b\u0438\u0446\u0430 \u0441\u0442\u0443\u0434\u0435\u043d\u0442\u043e\u0432 \u0438\u043c\u0435\u0435\u0442 \u0442\u0443 \u0436\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0443, \u0447\u0442\u043e \u0438 \u0432 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u043c \u0440\u0430\u0437\u0434\u0435\u043b\u0435;&nbsp;\u0432 \u0442\u043e \u0432\u0440\u0435\u043c\u044f \u043a\u0430\u043a \u0442\u0430\u0431\u043b\u0438\u0446\u0430 \u0430\u0434\u0440\u0435\u0441\u043e\u0432 \u0438\u043c\u0435\u0435\u0442 \u0441\u0442\u043e\u043b\u0431\u0435\u0446&nbsp;<strong>st_id,<\/strong>&nbsp;\u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u0442\u043e\u0431\u0440\u0430\u0436\u0430\u0435\u0442\u0441\u044f \u043d\u0430&nbsp;<strong>\u0441\u0442\u043e\u043b\u0431\u0435\u0446 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u0430 \u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0435 \u0441\u0442\u0443\u0434\u0435\u043d\u0442\u043e\u0432<\/strong>&nbsp;\u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u0432\u043d\u0435\u0448\u043d\u0435\u0433\u043e \u043a\u043b\u044e\u0447\u0430.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0421\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 \u043a\u043e\u0434 \u0441\u043e\u0437\u0434\u0430\u0441\u0442 \u0434\u0432\u0435 \u0442\u0430\u0431\u043b\u0438\u0446\u044b \u0432 College.db \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">from sqlalchemy import create_engine, MetaData, Table, Column, Integer, String, ForeignKey\nengine = create_engine('sqlite:\/\/\/college.db', echo=True)\nmeta = MetaData()\n\nstudents = Table(\n   'students', meta, \n   Column('id', Integer, primary_key = True), \n   Column('name', String), \n   Column('lastname', String), \n)\n\naddresses = Table(\n   'addresses', meta, \n   Column('id', Integer, primary_key = True), \n   Column('st_id', Integer, ForeignKey('students.id')), \n   Column('postal_add', String), \n   Column('email_add', String))\n\nmeta.create_all(engine)<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041f\u0440\u0438\u0432\u0435\u0434\u0435\u043d\u043d\u044b\u0439 \u0432\u044b\u0448\u0435 \u043a\u043e\u0434 \u043f\u0435\u0440\u0435\u0432\u0435\u0434\u0435\u0442 \u0437\u0430\u043f\u0440\u043e\u0441\u044b CREATE TABLE \u0434\u043b\u044f \u0441\u0442\u0443\u0434\u0435\u043d\u0442\u043e\u0432 \u0438 \u0442\u0430\u0431\u043b\u0438\u0446\u0443 \u0430\u0434\u0440\u0435\u0441\u043e\u0432, \u043a\u0430\u043a \u043f\u043e\u043a\u0430\u0437\u0430\u043d\u043e \u043d\u0438\u0436\u0435:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">CREATE TABLE students (\n   id INTEGER NOT NULL,\n   name VARCHAR,\n   lastname VARCHAR,\n   PRIMARY KEY (id)\n)\n\nCREATE TABLE addresses (\n   id INTEGER NOT NULL,\n   st_id INTEGER,\n   postal_add VARCHAR,\n   email_add VARCHAR,\n   PRIMARY KEY (id),\n   FOREIGN KEY(st_id) REFERENCES students (id)\n)<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041d\u0430 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0445 \u0441\u043a\u0440\u0438\u043d\u0448\u043e\u0442\u0430\u0445 \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u043d\u043d\u044b\u0439 \u0432\u044b\u0448\u0435 \u043a\u043e\u0434 \u043e\u0447\u0435\u043d\u044c \u0447\u0435\u0442\u043a\u043e \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/coderlessons.com\/wp-content\/uploads\/2019\/07\/create_table_queries.jpg\" alt=\"CREATE TABLE \u0417\u0430\u043f\u0440\u043e\u0441\u044b\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/coderlessons.com\/wp-content\/uploads\/2019\/07\/addresses_table_queries.jpg\" alt=\"\u0410\u0434\u0440\u0435\u0441\u0430 \u0442\u0430\u0431\u043b\u0438\u0446 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u042d\u0442\u0438 \u0442\u0430\u0431\u043b\u0438\u0446\u044b \u0437\u0430\u043f\u043e\u043b\u043d\u044f\u044e\u0442\u0441\u044f \u0434\u0430\u043d\u043d\u044b\u043c\u0438, \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u044f&nbsp;<strong>\u043c\u0435\u0442\u043e\u0434 insert ()<\/strong>&nbsp;\u0434\u043b\u044f \u0442\u0430\u0431\u043b\u0438\u0447\u043d\u044b\u0445 \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u0432.&nbsp;\u0427\u0442\u043e\u0431\u044b \u0432\u0441\u0442\u0430\u0432\u0438\u0442\u044c 5 \u0441\u0442\u0440\u043e\u043a \u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0443 \u0441\u0442\u0443\u0434\u0435\u043d\u0442\u043e\u0432, \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043a\u043e\u0434, \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u043d\u043d\u044b\u0439 \u043d\u0438\u0436\u0435 \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">from sqlalchemy import create_engine, MetaData, Table, Column, Integer, String\nengine = create_engine('sqlite:\/\/\/college.db', echo = True)\nmeta = MetaData()\n\nconn = engine.connect()\nstudents = Table(\n   'students', meta, \n   Column('id', Integer, primary_key = True), \n   Column('name', String), \n   Column('lastname', String), \n)\n\nconn.execute(students.insert(), [\n   {'name':'Ravi', 'lastname':'Kapoor'},\n   {'name':'Rajiv', 'lastname' : 'Khanna'},\n   {'name':'Komal','lastname' : 'Bhandari'},\n   {'name':'Abdul','lastname' : 'Sattar'},\n   {'name':'Priya','lastname' : 'Rajhans'},\n])<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0421\u0442\u0440\u043e\u043a\u0438<\/strong>&nbsp;\u0434\u043e\u0431\u0430\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0443 \u0430\u0434\u0440\u0435\u0441\u043e\u0432 \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">from sqlalchemy import create_engine, MetaData, Table, Column, Integer, String\nengine = create_engine('sqlite:\/\/\/college.db', echo = True)\nmeta = MetaData()\nconn = engine.connect()\n\naddresses = Table(\n   'addresses', meta, \n   Column('id', Integer, primary_key = True), \n   Column('st_id', Integer), \n   Column('postal_add', String), \n   Column('email_add', String)\n)\n\nconn.execute(addresses.insert(), [\n   {'st_id':1, 'postal_add':'Shivajinagar Pune', 'email_add':'ravi@gmail.com'},\n   {'st_id':1, 'postal_add':'ChurchGate Mumbai', 'email_add':'kapoor@gmail.com'},\n   {'st_id':3, 'postal_add':'Jubilee Hills Hyderabad', 'email_add':'komal@gmail.com'},\n   {'st_id':5, 'postal_add':'MG Road Bangaluru', 'email_add':'as@yahoo.com'},\n   {'st_id':2, 'postal_add':'Cannought Place new Delhi', 'email_add':'admin@khanna.com'},\n])<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0431\u0440\u0430\u0442\u0438\u0442\u0435 \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u0435, \u0447\u0442\u043e \u0441\u0442\u043e\u043b\u0431\u0435\u0446 st_id \u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0435 \u0430\u0434\u0440\u0435\u0441\u043e\u0432 \u0441\u0441\u044b\u043b\u0430\u0435\u0442\u0441\u044f \u043d\u0430 \u0441\u0442\u043e\u043b\u0431\u0435\u0446 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u0430 \u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0435 \u0441\u0442\u0443\u0434\u0435\u043d\u0442\u043e\u0432.&nbsp;\u0422\u0435\u043f\u0435\u0440\u044c \u043c\u044b \u043c\u043e\u0436\u0435\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u044d\u0442\u043e \u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u0435 \u0434\u043b\u044f \u0438\u0437\u0432\u043b\u0435\u0447\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 \u043e\u0431\u0435\u0438\u0445 \u0442\u0430\u0431\u043b\u0438\u0446.&nbsp;\u041c\u044b \u0445\u043e\u0442\u0438\u043c \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c&nbsp;<strong>\u0438\u043c\u044f<\/strong>&nbsp;\u0438&nbsp;<strong>\u0444\u0430\u043c\u0438\u043b\u0438\u044e<\/strong>&nbsp;\u0438\u0437 \u0442\u0430\u0431\u043b\u0438\u0446\u044b \u0441\u0442\u0443\u0434\u0435\u043d\u0442\u043e\u0432, \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u0439 st_id \u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0435 \u0430\u0434\u0440\u0435\u0441\u043e\u0432.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">from sqlalchemy.sql import select\ns = select([students, addresses]).where(students.c.id == addresses.c.st_id)\nresult = conn.execute(s)\n\nfor row in result:\n   print (row)<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0431\u044a\u0435\u043a\u0442\u044b select \u0431\u0443\u0434\u0443\u0442 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u044b\u0432\u0430\u0442\u044c\u0441\u044f \u0432 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0435 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0435 SQL, \u043e\u0431\u044a\u0435\u0434\u0438\u043d\u044f\u044e\u0449\u0435\u0435 \u0434\u0432\u0435 \u0442\u0430\u0431\u043b\u0438\u0446\u044b \u043e\u0431\u0449\u0435\u0433\u043e \u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u044f \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">SELECT students.id, \n   students.name, \n   students.lastname, \n   addresses.id, \n   addresses.st_id, \n   addresses.postal_add, \n   addresses.email_add\nFROM students, addresses\nWHERE students.id = addresses.st_id<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u042d\u0442\u043e \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u0442 \u043a \u0432\u044b\u0432\u043e\u0434\u0443 \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 \u043e\u0431\u0435\u0438\u0445 \u0442\u0430\u0431\u043b\u0438\u0446 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c:<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u041e\u0434\u043d\u043e\u0439 \u0438\u0437 \u0432\u0430\u0436\u043d\u044b\u0445 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0435\u0439 \u0420\u0421\u0423\u0411\u0414 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u0441\u0432\u044f\u0437\u0438 \u043c\u0435\u0436\u0434\u0443 \u0442\u0430\u0431\u043b\u0438\u0446\u0430\u043c\u0438.&nbsp;\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 SQL, \u0442\u0430\u043a\u0438\u0435 \u043a\u0430\u043a SELECT, UPDATE \u0438 DELETE, \u043c\u043e\u0433\u0443\u0442 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c\u0441\u044f \u043d\u0430\u0434 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[103],"tags":[],"class_list":["post-2892","page","type-page","status-publish","hentry","category-sqlalchemy"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages\/2892","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/comments?post=2892"}],"version-history":[{"count":0,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages\/2892\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/media?parent=2892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/categories?post=2892"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/tags?post=2892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}