{"published":"2020-05-01 23:00:00","type":"rich","blog_url":"https://sakaik.hateblo.jp/","version":"1.0","provider_name":"Hatena Blog","categories":["mysql"],"blog_title":"sakaik\u306e\u65e5\u3005\u96d1\u611f\uff5e(T)\u7de8","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsakaik.hateblo.jp%2Fentry%2F20200501%2Fmysql_undefined_user_variable_is_0x\" title=\"MySQL\u3067\u672a\u5b9a\u7fa9\u306e\u30e6\u30fc\u30b6\u5909\u6570\u306e\u8868\u793a\u304c\u304a\u304b\u3057\u3044(8.0.20) - sakaik\u306e\u65e5\u3005\u96d1\u611f\uff5e(T)\u7de8\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/sakaik/","title":"MySQL\u3067\u672a\u5b9a\u7fa9\u306e\u30e6\u30fc\u30b6\u5909\u6570\u306e\u8868\u793a\u304c\u304a\u304b\u3057\u3044(8.0.20)","height":"190","author_name":"sakaik","url":"https://sakaik.hateblo.jp/entry/20200501/mysql_undefined_user_variable_is_0x","provider_url":"https://hatena.blog","description":"MySQL \u3067\u306f @ \u3067\u59cb\u307e\u308b\u30e6\u30fc\u30b6\u5b9a\u7fa9\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 mysql> SET @v1=123, @s1=\"ABC\"; Query OK, 0 rows affected (0.00 sec) \u3053\u3093\u306a\u3075\u3046\u306b\u5b9a\u7fa9\u3059\u308b\u3068\u3001SELECT\u306a\u3069\u3067\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u3053\u3053\u3067\u3001\u4e0a\u3067\u5b9a\u7fa9\u3057\u305f2\u3064\u306e\u5909\u6570\u3068\u3001\u672a\u5b9a\u7fa9\u306e\u5909\u6570\u3092SELECT\u6587\u3067\u898b\u3066\u307f\u308b\u3068\uff1a mysql> SELECT @v1, @s1, @t1; +------+------+------------+ | @v1 | @s1 | @t1 | +------+------+------------+ | 123 | ABC | 0x | +\u2026","image_url":null,"width":"100%"}