{"id":3013,"date":"2021-07-21T12:11:20","date_gmt":"2021-07-21T12:11:20","guid":{"rendered":"https:\/\/www.bearloga.space\/?page_id=3013"},"modified":"2021-07-21T12:11:20","modified_gmt":"2021-07-21T12:11:20","slug":"postgresql-komanda-alter-table","status":"publish","type":"page","link":"https:\/\/www.bearloga.space\/en\/postgresql-komanda-alter-table\/","title":{"rendered":"PostgreSQL \u2014 \u043a\u043e\u043c\u0430\u043d\u0434\u0430 ALTER TABLE"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u041a\u043e\u043c\u0430\u043d\u0434\u0430 PostgreSQL&nbsp;<strong>ALTER TABLE<\/strong>&nbsp;\u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0434\u043b\u044f \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u044f, \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u0438\u043b\u0438 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0441\u0442\u043e\u043b\u0431\u0446\u043e\u0432 \u0432 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u0439 \u0442\u0430\u0431\u043b\u0438\u0446\u0435.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0412\u044b \u0442\u0430\u043a\u0436\u0435 \u043c\u043e\u0436\u0435\u0442\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043a\u043e\u043c\u0430\u043d\u0434\u0443 ALTER TABLE \u0434\u043b\u044f \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0445 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0439 \u0432 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u0439 \u0442\u0430\u0431\u043b\u0438\u0446\u0435.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u0421\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441&nbsp;<strong>ALTER TABLE<\/strong>&nbsp;\u0434\u043b\u044f \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043d\u043e\u0432\u043e\u0433\u043e \u0441\u0442\u043e\u043b\u0431\u0446\u0430 \u0432 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0443\u044e \u0442\u0430\u0431\u043b\u0438\u0446\u0443 \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\">ALTER TABLE table_name ADD column_name datatype;\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 ALTER TABLE to&nbsp;<strong>DROP COLUMN<\/strong>&nbsp;\u0432 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u0439 \u0442\u0430\u0431\u043b\u0438\u0446\u0435 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">ALTER TABLE table_name DROP COLUMN column_name;\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 ALTER TABLE \u0434\u043b\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0442\u0438\u043f\u0430 \u0434\u0430\u043d\u043d\u044b\u0445 \u0441\u0442\u043e\u043b\u0431\u0446\u0430 \u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0435 \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\">ALTER TABLE table_name ALTER COLUMN column_name TYPE datatype;\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 ALTER TABLE \u0434\u043b\u044f \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f&nbsp;<strong>NOT NULL<\/strong>&nbsp;\u043a \u0441\u0442\u043e\u043b\u0431\u0446\u0443 \u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0435 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">ALTER TABLE table_name MODIFY column_name datatype NOT NULL;\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 ALTER TABLE \u0434\u043b\u044f&nbsp;<strong>\u0414\u041e\u0411\u0410\u0412\u041b\u0415\u041d\u0418\u042f \u0423\u041d\u0418\u041a\u0410\u041b\u042c\u041d\u041e\u0413\u041e \u041e\u0413\u0420\u0410\u041d\u0418\u0427\u0415\u041d\u0418\u042f<\/strong>&nbsp;\u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0443 \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\">ALTER TABLE table_name\nADD CONSTRAINT MyUniqueConstraint UNIQUE(column1, column2...);\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 \u043a\u043e\u043c\u0430\u043d\u0434\u044b ALTER TABLE to\u00a0<strong>ADD CHECK CONSTRAINT<\/strong>\u00a0\u0434\u043b\u044f \u0442\u0430\u0431\u043b\u0438\u0446\u044b \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">ALTER TABLE table_name\nADD CONSTRAINT MyUniqueConstraint CHECK (CONDITION);\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f ALTER TABLE to&nbsp;<strong>ADD PRIMARY KEY<\/strong>&nbsp;\u0434\u043b\u044f \u0442\u0430\u0431\u043b\u0438\u0446\u044b \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">ALTER TABLE table_name\nADD CONSTRAINT MyPrimaryKey PRIMARY KEY (column1, column2...);\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 ALTER TABLE to&nbsp;<strong>DROP CONSTRAINT<\/strong>&nbsp;\u0438\u0437 \u0442\u0430\u0431\u043b\u0438\u0446\u044b \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">ALTER TABLE table_name\nDROP CONSTRAINT MyUniqueConstraint;\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0415\u0441\u043b\u0438 \u0432\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0435 MySQL, \u043a\u043e\u0434 \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">ALTER TABLE table_name\nDROP INDEX MyUniqueConstraint;\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f ALTER TABLE to&nbsp;<strong>DROP PRIMARY KEY<\/strong>&nbsp;\u0438\u0437 \u0442\u0430\u0431\u043b\u0438\u0446\u044b \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">ALTER TABLE table_name\nDROP CONSTRAINT MyPrimaryKey;\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0415\u0441\u043b\u0438 \u0432\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0435 MySQL, \u043a\u043e\u0434 \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">ALTER TABLE table_name\nDROP PRIMARY KEY;\n<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u043f\u0440\u0438\u043c\u0435\u0440<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0421\u0447\u0438\u0442\u0430\u0439\u0442\u0435, \u0447\u0442\u043e \u043d\u0430\u0448\u0430 \u0442\u0430\u0431\u043b\u0438\u0446\u0430&nbsp;<a href=\"https:\/\/www.tutorialspoint.com\/postgresql\/company.sql\" target=\"_blank\" rel=\"noreferrer noopener\">\u041a\u041e\u041c\u041f\u0410\u041d\u0418\u0418<\/a>&nbsp;\u0438\u043c\u0435\u0435\u0442 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0435 \u0437\u0430\u043f\u0438\u0441\u0438 \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"> id | name  | age | address   | salary\n----+-------+-----+-----------+--------\n  1 | Paul  |  32 | California|  20000\n  2 | Allen |  25 | Texas     |  15000\n  3 | Teddy |  23 | Norway    |  20000\n  4 | Mark  |  25 | Rich-Mond |  65000\n  5 | David |  27 | Texas     |  85000\n  6 | Kim   |  22 | South-Hall|  45000\n  7 | James |  24 | Houston   |  10000<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041d\u0438\u0436\u0435 \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u043d \u043f\u0440\u0438\u043c\u0435\u0440 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043d\u043e\u0432\u043e\u0433\u043e \u0441\u0442\u043e\u043b\u0431\u0446\u0430 \u0432 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0443\u044e \u0442\u0430\u0431\u043b\u0438\u0446\u0443:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">testdb=# ALTER TABLE COMPANY ADD GENDER char(1);<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0422\u0435\u043f\u0435\u0440\u044c \u0442\u0430\u0431\u043b\u0438\u0446\u0430 COMPANY \u0438\u0437\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f, \u0438 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0431\u0443\u0434\u0435\u0442 \u0432\u044b\u0432\u043e\u0434\u0438\u0442\u044c\u0441\u044f \u0438\u0437 \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440\u0430 SELECT \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"> id | name  | age | address     | salary | gender\n----+-------+-----+-------------+--------+--------\n  1 | Paul  |  32 | California  |  20000 |\n  2 | Allen |  25 | Texas       |  15000 |\n  3 | Teddy |  23 | Norway      |  20000 |\n  4 | Mark  |  25 | Rich-Mond   |  65000 |\n  5 | David |  27 | Texas       |  85000 |\n  6 | Kim   |  22 | South-Hall  |  45000 |\n  7 | James |  24 | Houston     |  10000 |\n(7 rows)<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u041d\u0438\u0436\u0435 \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u043d \u043f\u0440\u0438\u043c\u0435\u0440 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u0441\u0442\u043e\u043b\u0431\u0446\u0430 \u043f\u043e\u043b\u0430 \u0438\u0437 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u0439 \u0442\u0430\u0431\u043b\u0438\u0446\u044b:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">testdb=# ALTER TABLE COMPANY DROP GENDER;<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u0430\u043d\u0434\u0430 PostgreSQL&nbsp;ALTER TABLE&nbsp;\u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0434\u043b\u044f \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u044f, \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u0438\u043b\u0438 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0441\u0442\u043e\u043b\u0431\u0446\u043e\u0432 \u0432 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u0439 \u0442\u0430\u0431\u043b\u0438\u0446\u0435. \u0412\u044b \u0442\u0430\u043a\u0436\u0435 \u043c\u043e\u0436\u0435\u0442\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043a\u043e\u043c\u0430\u043d\u0434\u0443 ALTER TABLE \u0434\u043b\u044f [&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":[104],"tags":[],"class_list":["post-3013","page","type-page","status-publish","hentry","category-postgresql"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages\/3013","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/comments?post=3013"}],"version-history":[{"count":0,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages\/3013\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/media?parent=3013"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/categories?post=3013"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/tags?post=3013"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}