我用的是 UTF-8 编码的客户端,服务器也是 UTF-8 编码的,数据库也是,就连要保存的这个字符串“ <…”也是合法的 UTF-8。 问题的症结在于,MySQL 的“utf8”实际上不是真正的 UTF-8。 “utf8”只支持每个字符最多三个字节,而真正的 UTF-8 是每个字符最多四个字节。 MySQL 一直没有修复这个 bug,他们在...
) ENGINE=InnoDB AUTO_INCREMENT=2DEFAULTCHARSET=utf8mb4COLLATE=utf8mb4_general_ci; SQL数据 insertintotb1002(c1)select'AAAAA';insertintotb1002(c1)select'BBBBB';insertintotb1002(c1)select'CCCCC';insertintotb1002(c1)select'DDDDD'; mysql>select*fromtb1002orderbyid;+---+---+|id|c1|+---+-...
ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci; CREATE TABLE `user` ( `id` int NOT NULL AUTO_INCREMENT, `username` varchar(255) DEFAULT '', `nickname` varchar(255) DEFAULT '', PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci...
) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8mb4 insert into ty(a,b) values(2,3),(5,4),(6,7); 2.2 测试用例 T2 T1 begin; delete from ty where a=5; begin; delete from ty where a=5; insert into ty(a,b) values(2,10); delete from ty where a=5; ERROR 1213 (40001...
(255)DEFAULTNULLCOMMENT'aaaaa',`first`varchar(255)DEFAULTNULLCOMMENT'第一个',`second`varchar(255)DEFAULTNULLCOMMENT'第二个',`third`varchar(255)DEFAULTNULLCOMMENT'第三个',`num` intDEFAULTNULLCOMMENT'值',PRIMARYKEY(`id`))ENGINE=InnoDBAUTO_INCREMENT=23055DEFAULTCHARSET=utf8mb4COLLATE=utf8mb4_0900...
SHOW CREATE TABLE结果显示engine=innodb的意义是什么,不太理解 🪐 TiDB 技术问题 MySQL TiDBer_sJAqARVl (Ti D Ber S J Aq Ar Vl) 2022 年11 月 8 日 01:51 1 测试环境 Server version: 5.7.25-TiDB-v6.1.0 TiDB Server (Apache License 2.0) Community Edition, MySQL 5.7 compatibletidb...
CREATE TABLE t1 (pk int primary key, a int, b int, c int) ENGINE=INNODB;; SHOW CREATE TABLE t1; Table Create Table @@ -11,6 +9,37 @@ t1 CREATE TABLE `t1` ( PRIMARY KEY (`pk`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci INSERT INTO t1 values (1...
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin AUTO_INCREMENT=111420001; tiflash报错: 2021.08.04 15:21:35.599493 [ 18 ] SchemaSyncService: DB::SchemaSyncService::SchemaSyncService(DB::Context&)::<lambda()>: Sync schemas failed by DB::Exception: Storage engine DeltaMergedoesn’...
'主键id', `name` varchar(32) COLLATE utf8mb4_unicode_ci NOT NULL COMMENT '名称', `label` varchar(128) COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT '标签', PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='es agg ...
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='es agg 测试示例' 1. 2. 3. 4. 5. 6. 7. 8. 示例数据如下:第一列是主键 id,第二列是 name,第三列是 label 1,apple,iphone12 2,apple,iphone11 ...