{"id":7428,"date":"2019-08-01T10:00:07","date_gmt":"2019-08-01T01:00:07","guid":{"rendered":"https:\/\/www.gigas-jp.com\/appnews\/?p=7428"},"modified":"2019-07-31T00:49:10","modified_gmt":"2019-07-30T15:49:10","slug":"mysql-%e8%a4%87%e6%95%b0%e3%82%ab%e3%83%a9%e3%83%a0order-by%e3%81%ae%e4%b8%a6%e3%81%b3%e6%9b%bf%e3%81%88","status":"publish","type":"post","link":"https:\/\/www.gigas-jp.com\/appnews\/archives\/7428","title":{"rendered":"MySQL \u8907\u6570\u30ab\u30e9\u30e0&#8217;order by&#8217;\u306e\u4e26\u3073\u66ff\u3048"},"content":{"rendered":"\n<p>Web\u30b7\u30b9\u30c6\u30e0\u3067\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b\u30d1\u30bf\u30fc\u30f3\u3067\u3001\u767b\u9332\u3092\u304a\u3053\u306a\u3063\u305f\u5f8c\u306b\u4e00\u89a7\u753b\u9762\u306b\u8868\u793a\u3059\u308b\u3068\u3044\u3063\u305f\u51e6\u7406\u304c\u3042\u308a\u307e\u3059\u3002<br> \u4e00\u89a7\u753b\u9762\u3067\u306f\u3001\u767b\u9332\u304c\u65b0\u3057\u3044\u9806\u306b\u4e26\u3079\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u521d\u56de\u767b\u9332\u6642\u306e\u65e5\u6642\u306f\u300ccreated\u300d\u30ab\u30e9\u30e0\u306b\u4fdd\u5b58\u3055\u308c\u307e\u3059\u3002<br> \u307e\u305f\u4e00\u89a7\u753b\u9762\u3067\u306f\u7de8\u96c6\u3092\u304a\u3053\u306a\u3046\u3053\u3068\u3082\u53ef\u80fd\u3067\u3001\u7de8\u96c6\u3092\u304a\u3053\u306a\u3063\u305f\u5834\u5408\u306e\u7de8\u96c6\u65e5\u6642\u306f\u300cmodified\u300d\u30ab\u30e9\u30e0\u306b\u4fdd\u5b58\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>\u307e\u305a\u306f\u30b7\u30f3\u30d7\u30eb\u306a\u30d1\u30bf\u30fc\u30f3\u3001\u300ccreated\u300d\u30ab\u30e9\u30e0\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u65e5\u4ed8\u306e\u65b0\u3057\u3044\u9806\u306b\u4e26\u3079\u308bSQL\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select\n  created\n  , modified \nfrom\n  products \norder by\n  created desc;<\/code><\/pre>\n\n\n\n<p>\u4e0a\u8a18\u306e\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"243\" height=\"268\" src=\"\/appnews\/wp-content\/uploads\/sites\/4\/2019\/07\/1-2.png\" alt=\"\" class=\"wp-image-7429\"\/><\/figure>\n\n\n\n<p>\u6b21\u306f\u300cmodified\u300d\u30ab\u30e9\u30e0\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u65e5\u4ed8\u306e\u65b0\u3057\u3044\u9806\u306b\u4e26\u3079\u308bSQL\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select\n  created\n  , modified \nfrom\n  products \norder by\n  modified desc;<\/code><\/pre>\n\n\n\n<p>\u4e0a\u8a18\u306e\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"246\" height=\"269\" src=\"\/appnews\/wp-content\/uploads\/sites\/4\/2019\/07\/2-2.png\" alt=\"\" class=\"wp-image-7432\"\/><\/figure>\n\n\n\n<p>\u4ee5\u4e0a2\u3064\u306eSQL\u3092\u30df\u30c3\u30af\u30b9\u3057\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select\n  created\n  , modified \nfrom\n  products \norder by\n  modified desc, created desc;<\/code><\/pre>\n\n\n\n<p>\u4e0a\u8a18\u306e\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"246\" height=\"507\" src=\"\/appnews\/wp-content\/uploads\/sites\/4\/2019\/07\/3-2.png\" alt=\"\" class=\"wp-image-7433\"\/><\/figure>\n\n\n\n<p>\u3053\u306e\u5b9f\u884c\u7d50\u679c\u3067\u306fmodified\u30ab\u30e9\u30e0\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u65e5\u4ed8\u304c\u65b0\u3057\u3044\u9806\u306b\u4e26\u3073\u3001\u305d\u306e\u5f8c\uff08modified\u30ab\u30e9\u30e0\u304cnull\u306e\u5834\u5408\u306f\uff09<br> created\u30ab\u30e9\u30e0\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u65e5\u4ed8\u304c\u65b0\u3057\u3044\u9806\u306b\u4e26\u3076\u3068\u3044\u3046\u7d50\u679c\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>modified(\u7de8\u96c6)\u306fcreated(\u65b0\u898f\u767b\u9332)\u3088\u308a\u53e4\u304f\u306a\u308b\u3053\u3068\u306f\u306a\u3044\u306e\u3067\u3001modified\u304cnull\u306e\u5834\u5408\u306e\u307f\u3001created\u306e\u65e5\u6642\u3092\u4e26\u3073\u66ff\u3048\u306e\u5bfe\u8c61\u3068\u3057\u3066\u8a2d\u5b9a\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30ab\u30e9\u30e0\u304cnull\u304b\u3069\u3046\u304b\u306e\u5224\u5b9a\u65b9\u6cd5\u306f\u4f7f\u7528\u3057\u3066\u3044\u308bRDBMS\u306b\u3088\u308a\u7570\u306a\u308b\u3088\u3046\u3067\u3001<br> \u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8a18\u8ff0\u65b9\u6cd5\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u25a0MySQL\/MariaDB\u306e\u5834\u5408<br> IFNULL(expr1,expr2)<\/p>\n\n\n\n<p>\u25a0SQLServer\u306e\u5834\u5408<br> ISNULL(expr1,expr2)<\/p>\n\n\n\n<p>\u4eca\u56de\u306fMySQL\/MariaDB\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306bSQL\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002<br> orderdt\u3068\u3044\u3046\u4eee\u60f3\u306e\u30ab\u30e9\u30e0\u3092\u4f5c\u6210\u3057\u3066\u3001modified\u304cnull\u306e\u5834\u5408\u306f\u3001<br> created\u304corderdt\u306b\u683c\u7d0d\u3055\u308c\u3001modified\u304cnull\u3067\u306f\u306a\u3044\u5834\u5408\u306f\u3001<br> modified\u304corderdt\u306b\u683c\u7d0d\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u307e\u3059\u3002<br> \u4e26\u3073\u9806\u306forderdt\u3092\u57fa\u6e96\u306b\u65b0\u3057\u3044\u9806\u306b\u4e26\u3073\u304b\u3048\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select\n  created\n  , modified\n  , ifnull(modified, created) as orderdt \nfrom\n  products \norder by\n  orderdt desc;<\/code><\/pre>\n\n\n\n<p>\u4e0a\u8a18\u306e\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"365\" height=\"269\" src=\"\/appnews\/wp-content\/uploads\/sites\/4\/2019\/07\/4-2.png\" alt=\"\" class=\"wp-image-7434\"\/><\/figure>\n\n\n\n<p>\u3053\u308c\u3067\u60f3\u5b9a\u901a\u308a\u306e\u4e26\u3073\u9806\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u6728\u66dc\u65e5\u62c5\u5f53\uff1anishida<\/p>\n<div class='wp_social_bookmarking_light'>\n            <div class=\"wsbl_google_plus_one\"><g:plusone size=\"medium\" annotation=\"none\" href=\"https:\/\/www.gigas-jp.com\/appnews\/archives\/7428\" ><\/g:plusone><\/div>\n            <div class=\"wsbl_hatena_button\"><a href=\"\/\/b.hatena.ne.jp\/entry\/https:\/\/www.gigas-jp.com\/appnews\/archives\/7428\" class=\"hatena-bookmark-button\" data-hatena-bookmark-title=\"MySQL \u8907\u6570\u30ab\u30e9\u30e0&#8217;order by&#8217;\u306e\u4e26\u3073\u66ff\u3048\" data-hatena-bookmark-layout=\"standard\" title=\"\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0\"> <img src=\"\/\/b.hatena.ne.jp\/images\/entry-button\/button-only@2x.png\" alt=\"\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0\" width=\"20\" height=\"20\" style=\"border: none;\" \/><\/a><script type=\"text\/javascript\" src=\"\/\/b.hatena.ne.jp\/js\/bookmark_button.js\" charset=\"utf-8\" async=\"async\"><\/script><\/div>\n            <div class=\"wsbl_twitter\"><a href=\"https:\/\/twitter.com\/share\" class=\"twitter-share-button\" data-url=\"https:\/\/www.gigas-jp.com\/appnews\/archives\/7428\" data-text=\"MySQL \u8907\u6570\u30ab\u30e9\u30e0&#8217;order by&#8217;\u306e\u4e26\u3073\u66ff\u3048\" data-via=\"GIGASJAPAN_APPS\" data-lang=\"ja\">Tweet<\/a><\/div>\n            <div class=\"wsbl_facebook_like\"><div id=\"fb-root\"><\/div><fb:like href=\"https:\/\/www.gigas-jp.com\/appnews\/archives\/7428\" layout=\"button_count\" action=\"like\" width=\"100\" share=\"false\" show_faces=\"false\" ><\/fb:like><\/div>\n            <div class=\"wsbl_facebook_send\"><div id=\"fb-root\"><\/div><fb:send href=\"https:\/\/www.gigas-jp.com\/appnews\/archives\/7428\" colorscheme=\"light\" ><\/fb:send><\/div>\n    <\/div>\n<br class='wp_social_bookmarking_light_clear' \/>\n","protected":false},"excerpt":{"rendered":"<p>Web\u30b7\u30b9\u30c6\u30e0\u3067\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u308b\u30d1\u30bf\u30fc\u30f3\u3067\u3001\u767b\u9332\u3092\u304a\u3053\u306a\u3063\u305f\u5f8c\u306b\u4e00\u89a7\u753b\u9762\u306b\u8868\u793a\u3059\u308b\u3068\u3044\u3063\u305f\u51e6\u7406\u304c\u3042\u308a\u307e\u3059\u3002 \u4e00\u89a7\u753b\u9762\u3067\u306f\u3001\u767b\u9332\u304c\u65b0\u3057\u3044\u9806\u306b\u4e26\u3079\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u521d\u56de\u767b\u9332\u6642\u306e\u65e5\u6642\u306f\u300ccreated\u300d\u30ab\u30e9\u30e0\u306b\u4fdd\u5b58\u3055\u308c\u307e\u3059\u3002 \u307e [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[72,35],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/www.gigas-jp.com\/appnews\/wp-json\/wp\/v2\/posts\/7428"}],"collection":[{"href":"https:\/\/www.gigas-jp.com\/appnews\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gigas-jp.com\/appnews\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gigas-jp.com\/appnews\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gigas-jp.com\/appnews\/wp-json\/wp\/v2\/comments?post=7428"}],"version-history":[{"count":4,"href":"https:\/\/www.gigas-jp.com\/appnews\/wp-json\/wp\/v2\/posts\/7428\/revisions"}],"predecessor-version":[{"id":7457,"href":"https:\/\/www.gigas-jp.com\/appnews\/wp-json\/wp\/v2\/posts\/7428\/revisions\/7457"}],"wp:attachment":[{"href":"https:\/\/www.gigas-jp.com\/appnews\/wp-json\/wp\/v2\/media?parent=7428"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gigas-jp.com\/appnews\/wp-json\/wp\/v2\/categories?post=7428"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gigas-jp.com\/appnews\/wp-json\/wp\/v2\/tags?post=7428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}