{"author_url":"https://blog.hatena.ne.jp/tomotomo1129/","author_name":"tomotomo1129","title":"MySQL\u306eDUAL\u306e\u4f7f\u3044\u65b9","categories":["MySQL","SQL","DB"],"height":"190","url":"https://job-info.hateblo.jp/entry/2024/09/14/222325","published":"2024-09-14 22:23:25","blog_title":"Web\u958b\u767a\u306b\u304a\u3051\u308b\u77e5\u898b\u5171\u6709\u7cfb\u30da\u30fc\u30b8","image_url":null,"description":"MySQL\u306eDUAL\u306e\u4f7f\u3044\u65b9 \u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9 \u8907\u96d1\u306a\u4f8b DUAL\u3092\u4f7f\u7528\u3059\u308b\u7406\u7531 DUAL\u306f\u7701\u7565\u53ef\u80fd \u307e\u3068\u3081 MySQL\u306eDUAL\u306e\u4f7f\u3044\u65b9 MySQL\u306b\u304a\u3051\u308bDUAL\u306f\u3001\u7279\u5b9a\u306e\u72b6\u6cc1\u3067\u4f7f\u7528\u3055\u308c\u308b\u4eee\u60f3\u7684\u306a\u30c6\u30fc\u30d6\u30eb\u3067\u3059\u3002 MySQL\u306e\u30af\u30a8\u30ea\u3067\u3001\u30c6\u30fc\u30d6\u30eb\u3092\u6307\u5b9a\u3057\u306a\u3044SELECT\u6587\u3092\u5b9f\u884c\u3059\u308b\u5834\u5408\u306b\u3001FROM\u53e5\u304c\u5fc5\u9808\u306a\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u3088\u3046\u306a\u30b1\u30fc\u30b9\u3067DUAL\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 DUAL\u306f\u5b58\u5728\u3057\u306a\u3044\u7279\u5225\u306a\u30c6\u30fc\u30d6\u30eb\u3067\u3001\u3069\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u3082\u81ea\u52d5\u7684\u306b\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u5e38\u306b1\u884c1\u5217\u3060\u3051\u3092\u6301\u3064\u3068\u898b\u306a\u3055\u308c\u307e\u3059\u3002 \u3053\u306e\u305f\u3081\u3001DUAL\u306f\u3001\u30c7\u30fc\u30bf\u3092\u5b9f\u969b\u306b\u53d6\u5f97\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044\u30af\u30a8\u30ea\u3067\u4fbf\u5229\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002\u6b21\u306b\u3001\u3044\u304f\u3064\u304b\u306e\u4f8b\u3092\u4f7f\u3063\u3066DUAL\u2026","provider_name":"Hatena Blog","type":"rich","provider_url":"https://hatena.blog","blog_url":"https://job-info.hateblo.jp/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fjob-info.hateblo.jp%2Fentry%2F2024%2F09%2F14%2F222325\" title=\"MySQL\u306eDUAL\u306e\u4f7f\u3044\u65b9 - Web\u958b\u767a\u306b\u304a\u3051\u308b\u77e5\u898b\u5171\u6709\u7cfb\u30da\u30fc\u30b8\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","version":"1.0"}