{"id":731,"date":"2025-08-02T05:39:00","date_gmt":"2025-08-01T20:39:00","guid":{"rendered":"https:\/\/touhyo.com\/blog\/?p=731"},"modified":"2025-09-28T00:12:55","modified_gmt":"2025-09-27T15:12:55","slug":"db-renumbering","status":"publish","type":"post","link":"https:\/\/touhyo.com\/blog\/db-renumbering\/","title":{"rendered":"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u518d\u756a\u53f7\u5316"},"content":{"rendered":"\n<p>\u4f59\u8a08\u306a\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\u3057\u3066\u3057\u307e\u3063\u305f\u756a\u53f7\u3092\u4e0d\u8981\u6271\u3044\u306b\u3057\u3066\u6700\u65b0\u304b\u3089\u59cb\u3081\u308b\u65b9\u6cd5\u3067\u3059\u3002\u8981\u306f\u30ca\u30f3\u30d0\u30ea\u30f3\u30b0\u306e\u5fae\u8abf\u6574\u3002\u3054\u304f\u7a00\u306b\u691c\u8a3c\u3059\u308b\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\uff08SQL\uff09\u306e\u64cd\u4f5c\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u76f4\u63a5\u89e6\u308b\u3053\u3068\u306b\u306a\u308b\u305f\u3081\u7d30\u5fc3\u306e\u6ce8\u610f\u304c\u5fc5\u8981\uff08\u8aa4\u64cd\u4f5cNG\uff09\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-width:calc(1 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><pre class=\"shiki material-theme-lighter\" style=\"background-color: #FAFAFA\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #F76D47\">ALTER<\/span><span style=\"color: #90A4AE\"> <\/span><span style=\"color: #F76D47\">TABLE<\/span><span style=\"color: #90A4AE\"> tbl_a AUTO_INCREMENT <\/span><span style=\"color: #39ADB5\">=<\/span><span style=\"color: #90A4AE\"> <\/span><span style=\"color: #F76D47\">16<\/span><span style=\"color: #90A4AE\">;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>16\u4ee5\u964d\u3092db\u5185\u304b\u3089\u6d88\u3057\u305f\u4e0a\u3067\u3042\u3089\u305f\u3081\u306616\u304b\u3089\u756a\u53f7\u3092\u30b9\u30bf\u30fc\u30c8\u3057\u305f\u3044\u5834\u5408\u3067\u3059\u306d\u3002\u6700\u65b0\u306e\u756a\u53f7\u304c\u308f\u304b\u3089\u306a\u3044\uff08\u78ba\u8a8d\u304c\u624b\u9593\uff09\u3068\u3044\u3046\u72b6\u6cc1\u3067\u3042\u308c\u3070\u3053\u306e\u3088\u3046\u306a\u66f8\u304d\u65b9\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-width:calc(1 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><pre class=\"shiki material-theme-lighter\" style=\"background-color: #FAFAFA\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #F76D47\">SELECT<\/span><span style=\"color: #90A4AE\"> <\/span><span style=\"color: #6182B8\">MAX<\/span><span style=\"color: #90A4AE\">(id) <\/span><span style=\"color: #F76D47\">AS<\/span><span style=\"color: #90A4AE\"> max_id_a <\/span><span style=\"color: #F76D47\">FROM<\/span><span style=\"color: #90A4AE\"> tbl_a;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u4e0a\u8a18\u306f\u6700\u65b0id\u304b\u3089\u73fe\u6700\u5927\u5024\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-width:calc(1 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><pre class=\"shiki monokai\" style=\"background-color: #272822\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #F8F8F2\">max_id_a\uff1a31<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u4eee\u306b\u5024\u304c31\u306a\u3089\u4e0b\u8a18\u306e\u901a\u308a\u300c+1\u300d\u3057\u306632\u3067\u5b9f\u884c\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-width:calc(1 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><pre class=\"shiki material-theme-lighter\" style=\"background-color: #FAFAFA\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #F76D47\">ALTER<\/span><span style=\"color: #90A4AE\"> <\/span><span style=\"color: #F76D47\">TABLE<\/span><span style=\"color: #90A4AE\"> tbl_a AUTO_INCREMENT <\/span><span style=\"color: #39ADB5\">=<\/span><span style=\"color: #90A4AE\"> <\/span><span style=\"color: #F76D47\">32<\/span><span style=\"color: #90A4AE\">;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u3082\u3061\u308d\u3093\u3001\u73fe\u72b6\u306e\u6700\u5927\u5024\u306b\u300c+1\u300d\u3057\u3066\u53d6\u5f97\u3082OK\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-width:calc(1 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><pre class=\"shiki material-theme-lighter\" style=\"background-color: #FAFAFA\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #F76D47\">SELECT<\/span><span style=\"color: #90A4AE\"> <\/span><span style=\"color: #F76D47\">IFNULL<\/span><span style=\"color: #90A4AE\">(<\/span><span style=\"color: #6182B8\">MAX<\/span><span style=\"color: #90A4AE\">(id) <\/span><span style=\"color: #39ADB5\">+<\/span><span style=\"color: #90A4AE\"> <\/span><span style=\"color: #F76D47\">1<\/span><span style=\"color: #90A4AE\">, <\/span><span style=\"color: #F76D47\">1<\/span><span style=\"color: #90A4AE\">) <\/span><span style=\"color: #F76D47\">AS<\/span><span style=\"color: #90A4AE\"> next_id <\/span><span style=\"color: #F76D47\">FROM<\/span><span style=\"color: #90A4AE\"> tbl_a;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u7121\u99c4\u306a\u7a7a\u304d\u756a\u3092\u9632\u3050\u305f\u3081\u306e\u5bfe\u7b56\u3067\u3059\u3002\u4eca\u5f8c\u306e\u5c06\u6765\u7684\u306a\u30ca\u30f3\u30d0\u30ea\u30f3\u30b0\u3092\u898b\u8d8a\u3057\u3066\u67a0\u3092\u6574\u7406\u3057\u3066\u304a\u3051\u3070\u30c7\u30fc\u30bf\u904b\u55b6\u304c\u30b9\u30e0\u30fc\u30ba\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u30ed\u30fc\u30ab\u30eb\u74b0\u5883\u3067\u4e8b\u524d\u691c\u8a3c\u306f\u5fc5\u9808\u306a\u306e\u3067\u304a\u5fd8\u308c\u306a\u304f\u3002<\/p>\n\n\n\n<p>MySQL \/ MariaDB\u5bfe\u5fdc\u3002\u305d\u306e\u4ed6RDB\uff08\u4f8b\uff1aPostgreSQL\uff09\u306f\u8981\u30b3\u30fc\u30c9\u5909\u63db\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f59\u8a08\u306a\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\u3057\u3066\u3057\u307e\u3063\u305f\u756a\u53f7\u3092\u4e0d\u8981\u6271\u3044\u306b\u3057\u3066\u6700\u65b0\u304b\u3089\u59cb\u3081\u308b\u65b9\u6cd5\u3067\u3059\u3002\u8981\u306f\u30ca\u30f3\u30d0\u30ea\u30f3\u30b0\u306e\u5fae\u8abf\u6574\u3002\u3054\u304f\u7a00\u306b\u691c\u8a3c\u3059\u308b\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\uff08SQL\uff09\u306e\u64cd\u4f5c\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u76f4\u63a5\u89e6\u308b\u3053\u3068\u306b\u306a\u308b\u305f\u3081\u7d30\u5fc3\u306e\u6ce8\u610f\u304c\u5fc5\u8981\uff08 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"ja","_original_post":"https:\/\/touhyo.com\/blog\/?p=731","footnotes":""},"categories":[1],"tags":[],"class_list":["post-731","post","type-post","status-publish","format-standard","hentry","category-memo","ja"],"_links":{"self":[{"href":"https:\/\/touhyo.com\/blog\/wp-json\/wp\/v2\/posts\/731","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/touhyo.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/touhyo.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/touhyo.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/touhyo.com\/blog\/wp-json\/wp\/v2\/comments?post=731"}],"version-history":[{"count":43,"href":"https:\/\/touhyo.com\/blog\/wp-json\/wp\/v2\/posts\/731\/revisions"}],"predecessor-version":[{"id":1207,"href":"https:\/\/touhyo.com\/blog\/wp-json\/wp\/v2\/posts\/731\/revisions\/1207"}],"wp:attachment":[{"href":"https:\/\/touhyo.com\/blog\/wp-json\/wp\/v2\/media?parent=731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/touhyo.com\/blog\/wp-json\/wp\/v2\/categories?post=731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/touhyo.com\/blog\/wp-json\/wp\/v2\/tags?post=731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}