{"id":252,"date":"2016-04-09T14:37:50","date_gmt":"2016-04-09T14:37:50","guid":{"rendered":"http:\/\/emacslisp.com\/?p=252"},"modified":"2016-04-09T14:40:00","modified_gmt":"2016-04-09T14:40:00","slug":"sqlite-datetime-compare-in-websql","status":"publish","type":"post","link":"http:\/\/emacslisp.com\/?p=252","title":{"rendered":"Sqlite DateTime compare in WebSQL"},"content":{"rendered":"<p>Sqlite has DateTime. However, in my test &#8216;DateTime&#8217; is similar with &#8216;Text&#8217;.<\/p>\n<p>for example, javascript moment.js,<\/p>\n<pre lang=\"javascript\" line=\"1\"> \r\n\r\nvar date = new moment().format('YYYY-MM-DD hh:mm');\r\nsaveToDatebase(date);\r\n\r\nvar date = new moment().format('YYYY-MM-DD h:mm a');\r\nsaveToDatebase(date);\r\n\r\n<\/pre>\n<p>in sqlite, two different format will saved as different string.<\/p>\n<p><strong>it is better not to compare two different format,<\/strong> such as &#8216;2016-10-10&#8217; and &#8216;2016-10-10 10:10:10&#8217;. it is comparable, but it is meanless.<\/p>\n<p>therefore, in my test, and date time should be save as YYYY-MM-DD hh:mm, such as &#8216;2016-10-10 10:10&#8217; format.<\/p>\n<p>then, sql statement like &#8216;select * from test where startDate < '2016-10-10 15:15' will work perfectly well.\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sqlite has DateTime. However, in my test &#8216;DateTime&#8217; is similar with &#8216;Text&#8217;. for example, javascript moment.js, var date = new moment().format(&#8216;YYYY-MM-DD hh:mm&#8217;); saveToDatebase(date); var date = new moment().format(&#8216;YYYY-MM-DD h:mm a&#8217;); saveToDatebase(date); in sqlite, two different format will saved as different string. it is better not to compare two different format, such as &#8216;2016-10-10&#8217; and &#8216;2016-10-10 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-252","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/emacslisp.com\/index.php?rest_route=\/wp\/v2\/posts\/252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/emacslisp.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/emacslisp.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/emacslisp.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/emacslisp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=252"}],"version-history":[{"count":4,"href":"http:\/\/emacslisp.com\/index.php?rest_route=\/wp\/v2\/posts\/252\/revisions"}],"predecessor-version":[{"id":256,"href":"http:\/\/emacslisp.com\/index.php?rest_route=\/wp\/v2\/posts\/252\/revisions\/256"}],"wp:attachment":[{"href":"http:\/\/emacslisp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/emacslisp.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=252"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/emacslisp.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}