WordPress database error: [Unknown column 'object_last_modified' in 'SET']
UPDATE `8BgzEqNvq_yoast_indexable` SET `object_id` = '206', `object_type` = 'post', `object_sub_type` = 'post', `permalink` = 'https://vkalessis.sites.sch.gr/?p=206', `primary_focus_keyword_score` = NULL, `readability_score` = '90', `is_cornerstone` = '0', `is_robots_noindex` = NULL, `is_robots_nofollow` = '0', `is_robots_noimageindex` = NULL, `is_robots_noarchive` = NULL, `is_robots_nosnippet` = NULL, `open_graph_image` = NULL, `open_graph_image_id` = NULL, `open_graph_image_source` = NULL, `open_graph_image_meta` = NULL, `twitter_image` = NULL, `twitter_image_id` = NULL, `twitter_image_source` = NULL, `primary_focus_keyword` = NULL, `canonical` = NULL, `title` = NULL, `description` = NULL, `breadcrumb_title` = 'Α Λυκείου Διαγωνισμός ΘΑΛΗΣ 2009-2019', `open_graph_title` = NULL, `open_graph_description` = NULL, `twitter_title` = NULL, `twitter_description` = NULL, `estimated_reading_time_minutes` = NULL, `author_id` = '1', `post_parent` = '0', `number_of_pages` = NULL, `post_status` = 'publish', `is_protected` = '0', `is_public` = NULL, `has_public_posts` = NULL, `blog_id` = '1', `schema_page_type` = NULL, `schema_article_type` = NULL, `object_last_modified` = '2020-10-01 19:56:40', `object_published_at` = '2020-09-21 18:31:26', `version` = '2', `permalink_hash` = '37:5a2277e8b7d865b90e9b449c4b77873a', `updated_at` = '2026-04-26 17:53:12' WHERE `id` = '169'

WordPress database error: [Unknown column 'object_published_at' in 'SET']
UPDATE `8BgzEqNvq_yoast_indexable` SET `object_type` = 'home-page', `title` = 'v4math.mysch.gr', `breadcrumb_title` = 'Home', `permalink` = 'https://vkalessis.sites.sch.gr/', `blog_id` = '1', `description` = 'mathematics vkalessis v4math εκπαίδευση μαθηματικά', `is_robots_noindex` = '0', `open_graph_title` = 'v4math.mysch.gr', `open_graph_image` = 'https://vkalessis.sites.sch.gr/wp-content/uploads/2020/09/helen_friel_5-copy.png', `open_graph_image_id` = '22', `open_graph_description` = '', `open_graph_image_source` = 'set-by-user', `open_graph_image_meta` = '{\"width\":610,\"height\":915,\"url\":\"https://vkalessis.sites.sch.gr/wp-content/uploads/2020/09/helen_friel_5-copy.png\",\"path\":\"/var/www/vhosts/vkalessis.sites.sch.gr/httpdocs/wp-content/uploads/2020/09/helen_friel_5-copy.png\",\"size\":\"full\",\"id\":22,\"alt\":\"\",\"pixels\":558150,\"type\":\"image/png\"}', `object_published_at` = '2020-09-18 15:44:51', `object_last_modified` = '2023-01-22 18:29:02', `version` = '2', `permalink_hash` = '31:242e5653101d85258b68ddd5f49e94dc', `updated_at` = '2026-04-26 17:53:12' WHERE `id` = '1'

{"id":206,"date":"2020-09-21T18:31:26","date_gmt":"2020-09-21T18:31:26","guid":{"rendered":"https:\/\/vkalessis.sites.sch.gr\/?p=206"},"modified":"2020-10-01T19:56:40","modified_gmt":"2020-10-01T19:56:40","slug":"%ce%b1-%ce%bb%cf%85%ce%ba%ce%b5%ce%af%ce%bf%cf%85-%ce%b4%ce%b9%ce%b1%ce%b3%cf%89%ce%bd%ce%b9%cf%83%ce%bc%cf%8c%cf%82-%ce%b8%ce%b1%ce%bb%ce%b7%cf%83-2009-2019","status":"publish","type":"post","link":"https:\/\/vkalessis.sites.sch.gr\/?p=206","title":{"rendered":"\u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u0398\u0391\u039b\u0397\u03a3 2009-2019"},"content":{"rendered":"\n
\u0398\u03b1\u03bb\u03ae\u03c2 \u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0395\u03ba\u03c6\u03c9\u03bd\u03ae\u03c3\u03b5\u03b9\u03c2 2009 \u2013 2019<\/a><\/a>Download<\/a><\/div>\n\n\n\n
\u0398\u03b1\u03bb\u03ae\u03c2 \u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u039b\u03cd\u03c3\u03b5\u03b9\u03c2 2009 \u2013 2019<\/a><\/a>Download<\/a><\/div>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[24,11],"yoast_head":"\n\u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u0398\u0391\u039b\u0397\u03a3 2009-2019 - v4math<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/vkalessis.sites.sch.gr\/?p=206\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u0398\u0391\u039b\u0397\u03a3 2009-2019 - v4math\" \/>\n<meta property=\"og:url\" content=\"https:\/\/vkalessis.sites.sch.gr\/?p=206\" \/>\n<meta property=\"og:site_name\" content=\"v4math\" \/>\n<meta property=\"article:published_time\" content=\"2020-09-21T18:31:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-10-01T19:56:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/vkalessis.sites.sch.gr\/wp-content\/uploads\/2020\/09\/helen_friel_5-copy.png\" \/>\n\t<meta property=\"og:image:width\" content=\"610\" \/>\n\t<meta property=\"og:image:height\" content=\"915\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/?p=206#article\",\"isPartOf\":{\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/?p=206\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/ec55c04c4a175b48b015f4b0fadd2738\"},\"headline\":\"\u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u0398\u0391\u039b\u0397\u03a3 2009-2019\",\"datePublished\":\"2020-09-21T18:31:26+00:00\",\"dateModified\":\"2020-10-01T19:56:40+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/?p=206\"},\"wordCount\":3,\"publisher\":{\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/ec55c04c4a175b48b015f4b0fadd2738\"},\"keywords\":[\"\u0391_\u03bb\u03c5\u03ba\u03b5\u03af\u03bf\u03c5\",\"\u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03bf\u03af\"],\"articleSection\":[\"\u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03bf\u03af \u0395\u039c\u0395\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/?p=206\",\"url\":\"https:\/\/vkalessis.sites.sch.gr\/?p=206\",\"name\":\"\u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u0398\u0391\u039b\u0397\u03a3 2009-2019 - v4math\",\"isPartOf\":{\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/#website\"},\"datePublished\":\"2020-09-21T18:31:26+00:00\",\"dateModified\":\"2020-10-01T19:56:40+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/?p=206#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/vkalessis.sites.sch.gr\/?p=206\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/?p=206#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vkalessis.sites.sch.gr\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u0398\u0391\u039b\u0397\u03a3 2009-2019\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/#website\",\"url\":\"https:\/\/vkalessis.sites.sch.gr\/\",\"name\":\"http:\/\/v4math.mysch.gr\",\"description\":\"math inside\",\"publisher\":{\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/ec55c04c4a175b48b015f4b0fadd2738\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/vkalessis.sites.sch.gr\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/ec55c04c4a175b48b015f4b0fadd2738\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/vkalessis.sites.sch.gr\/wp-content\/uploads\/2020\/09\/helen_friel_5-copy.png\",\"contentUrl\":\"https:\/\/vkalessis.sites.sch.gr\/wp-content\/uploads\/2020\/09\/helen_friel_5-copy.png\",\"width\":610,\"height\":915,\"caption\":\"admin\"},\"logo\":{\"@id\":\"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/image\/\"},\"sameAs\":[\"https:\/\/vkalessis.sites.sch.gr\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u0398\u0391\u039b\u0397\u03a3 2009-2019 - v4math","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/vkalessis.sites.sch.gr\/?p=206","og_locale":"en_US","og_type":"article","og_title":"\u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u0398\u0391\u039b\u0397\u03a3 2009-2019 - v4math","og_url":"https:\/\/vkalessis.sites.sch.gr\/?p=206","og_site_name":"v4math","article_published_time":"2020-09-21T18:31:26+00:00","article_modified_time":"2020-10-01T19:56:40+00:00","og_image":[{"width":610,"height":915,"url":"https:\/\/vkalessis.sites.sch.gr\/wp-content\/uploads\/2020\/09\/helen_friel_5-copy.png","type":"image\/png"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"Written by":"admin"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/vkalessis.sites.sch.gr\/?p=206#article","isPartOf":{"@id":"https:\/\/vkalessis.sites.sch.gr\/?p=206"},"author":{"name":"admin","@id":"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/ec55c04c4a175b48b015f4b0fadd2738"},"headline":"\u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u0398\u0391\u039b\u0397\u03a3 2009-2019","datePublished":"2020-09-21T18:31:26+00:00","dateModified":"2020-10-01T19:56:40+00:00","mainEntityOfPage":{"@id":"https:\/\/vkalessis.sites.sch.gr\/?p=206"},"wordCount":3,"publisher":{"@id":"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/ec55c04c4a175b48b015f4b0fadd2738"},"keywords":["\u0391_\u03bb\u03c5\u03ba\u03b5\u03af\u03bf\u03c5","\u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03bf\u03af"],"articleSection":["\u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03bf\u03af \u0395\u039c\u0395"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/vkalessis.sites.sch.gr\/?p=206","url":"https:\/\/vkalessis.sites.sch.gr\/?p=206","name":"\u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u0398\u0391\u039b\u0397\u03a3 2009-2019 - v4math","isPartOf":{"@id":"https:\/\/vkalessis.sites.sch.gr\/#website"},"datePublished":"2020-09-21T18:31:26+00:00","dateModified":"2020-10-01T19:56:40+00:00","breadcrumb":{"@id":"https:\/\/vkalessis.sites.sch.gr\/?p=206#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/vkalessis.sites.sch.gr\/?p=206"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/vkalessis.sites.sch.gr\/?p=206#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/vkalessis.sites.sch.gr\/"},{"@type":"ListItem","position":2,"name":"\u0391 \u039b\u03c5\u03ba\u03b5\u03af\u03bf\u03c5 \u0394\u03b9\u03b1\u03b3\u03c9\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u0398\u0391\u039b\u0397\u03a3 2009-2019"}]},{"@type":"WebSite","@id":"https:\/\/vkalessis.sites.sch.gr\/#website","url":"https:\/\/vkalessis.sites.sch.gr\/","name":"http:\/\/v4math.mysch.gr","description":"math inside","publisher":{"@id":"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/ec55c04c4a175b48b015f4b0fadd2738"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/vkalessis.sites.sch.gr\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":["Person","Organization"],"@id":"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/ec55c04c4a175b48b015f4b0fadd2738","name":"admin","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/image\/","url":"https:\/\/vkalessis.sites.sch.gr\/wp-content\/uploads\/2020\/09\/helen_friel_5-copy.png","contentUrl":"https:\/\/vkalessis.sites.sch.gr\/wp-content\/uploads\/2020\/09\/helen_friel_5-copy.png","width":610,"height":915,"caption":"admin"},"logo":{"@id":"https:\/\/vkalessis.sites.sch.gr\/#\/schema\/person\/image\/"},"sameAs":["https:\/\/vkalessis.sites.sch.gr"]}]}},"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/vkalessis.sites.sch.gr\/index.php?rest_route=\/wp\/v2\/posts\/206"}],"collection":[{"href":"https:\/\/vkalessis.sites.sch.gr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vkalessis.sites.sch.gr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vkalessis.sites.sch.gr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vkalessis.sites.sch.gr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=206"}],"version-history":[{"count":3,"href":"https:\/\/vkalessis.sites.sch.gr\/index.php?rest_route=\/wp\/v2\/posts\/206\/revisions"}],"predecessor-version":[{"id":220,"href":"https:\/\/vkalessis.sites.sch.gr\/index.php?rest_route=\/wp\/v2\/posts\/206\/revisions\/220"}],"wp:attachment":[{"href":"https:\/\/vkalessis.sites.sch.gr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=206"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vkalessis.sites.sch.gr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=206"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vkalessis.sites.sch.gr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}