{"id":2880,"date":"2021-07-21T07:38:23","date_gmt":"2021-07-21T07:38:23","guid":{"rendered":"https:\/\/www.bearloga.space\/?page_id=2880"},"modified":"2021-07-21T07:38:24","modified_gmt":"2021-07-21T07:38:24","slug":"yadro-sqlalchemy-vybor-strok","status":"publish","type":"page","link":"https:\/\/www.bearloga.space\/uk\/yadro-sqlalchemy-vybor-strok\/","title":{"rendered":"\u042f\u0434\u0440\u043e SQLAlchemy \u2014 \u0412\u044b\u0431\u043e\u0440 \u0441\u0442\u0440\u043e\u043a"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u0412 \u044d\u0442\u043e\u0439 \u0433\u043b\u0430\u0432\u0435 \u043c\u044b \u043e\u0431\u0441\u0443\u0434\u0438\u043c \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u044e \u0432\u044b\u0431\u043e\u0440\u0430 \u0441\u0442\u0440\u043e\u043a \u0432 \u0442\u0430\u0431\u043b\u0438\u0447\u043d\u043e\u043c \u043e\u0431\u044a\u0435\u043a\u0442\u0435.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u041c\u0435\u0442\u043e\u0434 select () \u0442\u0430\u0431\u043b\u0438\u0447\u043d\u043e\u0433\u043e \u043e\u0431\u044a\u0435\u043a\u0442\u0430 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043d\u0430\u043c&nbsp;<strong>\u0441\u043e\u0437\u0434\u0430\u0432\u0430\u0442\u044c \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0435 SELECT<\/strong>&nbsp;.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">s = students.select()<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0431\u044a\u0435\u043a\u0442 select \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u0443\u0435\u0442\u0441\u044f \u0432&nbsp;<strong>\u0437\u0430\u043f\u0440\u043e\u0441 SELECT \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0444\u0443\u043d\u043a\u0446\u0438\u0438 str (s),<\/strong>&nbsp;\u043a\u0430\u043a \u043f\u043e\u043a\u0430\u0437\u0430\u043d\u043e \u043d\u0438\u0436\u0435 \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">'SELECT students.id, students.name, students.lastname FROM students'<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041c\u044b \u043c\u043e\u0436\u0435\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u044d\u0442\u043e\u0442 \u043e\u0431\u044a\u0435\u043a\u0442 select \u043a\u0430\u043a \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440 \u0434\u043b\u044f \u043c\u0435\u0442\u043e\u0434\u0430 execute () \u043e\u0431\u044a\u0435\u043a\u0442\u0430 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f, \u043a\u0430\u043a \u043f\u043e\u043a\u0430\u0437\u0430\u043d\u043e \u0432 \u043a\u043e\u0434\u0435 \u043d\u0438\u0436\u0435 \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">result = conn.execute(s)<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041a\u043e\u0433\u0434\u0430 \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u043d\u043d\u044b\u0439 \u0432\u044b\u0448\u0435 \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f, \u043e\u0431\u043e\u043b\u043e\u0447\u043a\u0430 Python \u043e\u0442\u043e\u0431\u0440\u0430\u0436\u0430\u0435\u0442 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0435 \u044d\u043a\u0432\u0438\u0432\u0430\u043b\u0435\u043d\u0442\u043d\u043e\u0435 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0435 SQL \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">SELECT students.id, students.name, students.lastname\nFROM students<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0438\u0440\u0443\u044e\u0449\u0430\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0430\u044f \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u044d\u043a\u0432\u0438\u0432\u0430\u043b\u0435\u043d\u0442\u043e\u043c \u043a\u0443\u0440\u0441\u043e\u0440\u0430 \u0432 DBAPI.&nbsp;\u0422\u0435\u043f\u0435\u0440\u044c \u043c\u044b \u043c\u043e\u0436\u0435\u043c&nbsp;<strong>\u043f\u043e\u043b\u0443\u0447\u0430\u0442\u044c<\/strong>&nbsp;\u0437\u0430\u043f\u0438\u0441\u0438, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f&nbsp;<strong>\u043c\u0435\u0442\u043e\u0434 fetchone ()<\/strong>&nbsp;.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">row = result.fetchone()<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0412\u0441\u0435 \u0432\u044b\u0431\u0440\u0430\u043d\u043d\u044b\u0435 \u0441\u0442\u0440\u043e\u043a\u0438 \u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0435 \u043c\u043e\u0433\u0443\u0442 \u0431\u044b\u0442\u044c \u043d\u0430\u043f\u0435\u0447\u0430\u0442\u0430\u043d\u044b \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e&nbsp;<strong>\u0446\u0438\u043a\u043b\u0430 for,<\/strong>&nbsp;\u043a\u0430\u043a \u043f\u043e\u043a\u0430\u0437\u0430\u043d\u043e \u043d\u0438\u0436\u0435 \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">for row in result:\n   print (row)<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041f\u043e\u043b\u043d\u044b\u0439 \u043a\u043e\u0434 \u0434\u043b\u044f \u043f\u0435\u0447\u0430\u0442\u0438 \u0432\u0441\u0435\u0445 \u0441\u0442\u0440\u043e\u043a \u0438\u0437 \u0442\u0430\u0431\u043b\u0438\u0446\u044b \u0441\u0442\u0443\u0434\u0435\u043d\u0442\u043e\u0432 \u043f\u043e\u043a\u0430\u0437\u0430\u043d \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\nstudents = Table(\n   'students', meta, \n   Column('id', Integer, primary_key = True), \n   Column('name', String), \n   Column('lastname', String), \n)\n\ns = students.select()\nconn = engine.connect()\nresult = conn.execute(s)\n\nfor row in result:\n   print (row)<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0412\u044b\u0432\u043e\u0434, \u043f\u043e\u043a\u0430\u0437\u0430\u043d\u043d\u044b\u0439 \u0432 \u043e\u0431\u043e\u043b\u043e\u0447\u043a\u0435 Python, \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">(1, 'Ravi', 'Kapoor')\n(2, 'Rajiv', 'Khanna')\n(3, 'Komal', 'Bhandari')\n(4, 'Abdul', 'Sattar')\n(5, 'Priya', 'Rajhans')\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u0438\u0435 WHERE \u0437\u0430\u043f\u0440\u043e\u0441\u0430 SELECT \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u043e \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e&nbsp;<strong>Select.where ()<\/strong>&nbsp;.&nbsp;\u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0435\u0441\u043b\u0438 \u043c\u044b \u0445\u043e\u0442\u0438\u043c \u043e\u0442\u043e\u0431\u0440\u0430\u0436\u0430\u0442\u044c \u0441\u0442\u0440\u043e\u043a\u0438 \u0441 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u043c&gt; 2<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">s = students.select().where(students.c.id&gt;2)\nresult = conn.execute(s)\n\nfor row in result:\n   print (row)<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0417\u0434\u0435\u0441\u044c&nbsp;<strong>\u0430\u0442\u0440\u0438\u0431\u0443\u0442 c \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u0441\u0435\u0432\u0434\u043e\u043d\u0438\u043c\u043e\u043c \u0434\u043b\u044f \u0441\u0442\u043e\u043b\u0431\u0446\u0430<\/strong>&nbsp;.&nbsp;\u0421\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0431\u0443\u0434\u0435\u0442 \u043e\u0442\u043e\u0431\u0440\u0430\u0436\u0430\u0442\u044c\u0441\u044f \u043d\u0430 \u043e\u0431\u043e\u043b\u043e\u0447\u043a\u0435 \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">(3, 'Komal', 'Bhandari')\n(4, 'Abdul', 'Sattar')\n(5, 'Priya', 'Rajhans')\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0417\u0434\u0435\u0441\u044c \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c, \u0447\u0442\u043e \u043e\u0431\u044a\u0435\u043a\u0442 select \u0442\u0430\u043a\u0436\u0435 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0444\u0443\u043d\u043a\u0446\u0438\u0438 select () \u0432 \u043c\u043e\u0434\u0443\u043b\u0435 sqlalchemy.sql.&nbsp;\u0424\u0443\u043d\u043a\u0446\u0438\u044f select () \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442\u0430 \u0442\u0430\u0431\u043b\u0438\u0447\u043d\u044b\u0439 \u043e\u0431\u044a\u0435\u043a\u0442.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0412 \u044d\u0442\u043e\u0439 \u0433\u043b\u0430\u0432\u0435 \u043c\u044b \u043e\u0431\u0441\u0443\u0434\u0438\u043c \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u044e \u0432\u044b\u0431\u043e\u0440\u0430 \u0441\u0442\u0440\u043e\u043a \u0432 \u0442\u0430\u0431\u043b\u0438\u0447\u043d\u043e\u043c \u043e\u0431\u044a\u0435\u043a\u0442\u0435. \u041c\u0435\u0442\u043e\u0434 select () \u0442\u0430\u0431\u043b\u0438\u0447\u043d\u043e\u0433\u043e \u043e\u0431\u044a\u0435\u043a\u0442\u0430 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043d\u0430\u043c&nbsp;\u0441\u043e\u0437\u0434\u0430\u0432\u0430\u0442\u044c \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0435 SELECT&nbsp;. [&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-2880","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\/2880","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=2880"}],"version-history":[{"count":0,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages\/2880\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/media?parent=2880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/categories?post=2880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/tags?post=2880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}