04 2024 档案

摘要:1. The following options also have an impact on the source: • For the greatest possible durability and consistency in a replication setup using InnoDB 阅读全文
posted @ 2024-04-26 00:01 东山絮柳仔 阅读(54) 评论(0) 推荐(0) 编辑
摘要:1. ...行业的数字化转型也进入了深水期,我们看到技术与场景的深度融合所带来的创新体验,看到了数字化加持下的流程再造和效率提升,也看到了行业引领者在业务模式和商业模式创新方面孜孜不倦的探索。 ...数字经济蓬勃发展时代,数据已成为关键生产要素。数据赋能企业经营决策、业务模式创新的需求不断变化,已经 阅读全文
posted @ 2024-04-21 23:13 东山絮柳仔 阅读(52) 评论(0) 推荐(0) 编辑
摘要:A locking read, an UPDATE, or a DELETE generally set record locks on every index record that is scanned in the processing of an SQL statement. It does 阅读全文
posted @ 2024-04-20 22:07 东山絮柳仔 阅读(40) 评论(0) 推荐(0) 编辑
摘要:The InnoDB transaction model aims to combine the best properties【ˈprɑpərtiz 财产;特性;房地产;不动产;财物;庄园;所有物;房屋及院落;】 of a multi-versioning database with tradit 阅读全文
posted @ 2024-04-20 11:13 东山絮柳仔 阅读(59) 评论(0) 推荐(0) 编辑
摘要:To implement a large-scale, busy, or highly reliable database application, to port substantial【səbˈstænʃl】 code from a different database system, or t 阅读全文
posted @ 2024-04-20 00:13 东山絮柳仔 阅读(42) 评论(0) 推荐(0) 编辑
摘要:1.Data Type Default Values Data type specifications can have explicit【ɪkˈsplɪsɪt 明确的;详述的;直言的, 坦率的;一目了然的;】 or implicit【ɪmˈplɪsɪt 含蓄的;完全的;内含的;无疑问的;不直接言明 阅读全文
posted @ 2024-04-17 22:26 东山絮柳仔 阅读(46) 评论(0) 推荐(0) 编辑
摘要:The string data types are CHAR, VARCHAR, BINARY, VARBINARY, BLOB, TEXT, ENUM, and SET. 1.String Data Type Syntax In some cases, MySQL may change a str 阅读全文
posted @ 2024-04-16 22:59 东山絮柳仔 阅读(53) 评论(0) 推荐(0) 编辑
摘要:前述 Data type descriptions use these conventions: • For integer types, M indicates the maximum display width. For floating-point and fixed-point types, 阅读全文
posted @ 2024-04-15 23:03 东山絮柳仔 阅读(78) 评论(0) 推荐(0) 编辑
摘要:1.Supported Character Sets and Collations To list the available character sets and their default collations, use the SHOW CHARACTER SET statement or q 阅读全文
posted @ 2024-04-14 22:48 东山絮柳仔 阅读(51) 评论(0) 推荐(0) 编辑
摘要:1.概述 The Unicode Standard includes characters from the Basic Multilingual Plane (BMP) and supplementary characters that lie outside the BMP. This sect 阅读全文
posted @ 2024-04-14 09:11 东山絮柳仔 阅读(54) 评论(0) 推荐(0) 编辑
摘要:1.Configuring Application Character Set and Collation Regardless of how you configure the MySQL character set for application use, you must also consi 阅读全文
posted @ 2024-04-13 22:02 东山絮柳仔 阅读(34) 评论(0) 推荐(0) 编辑
摘要:1.Character String Literal【ˈlɪtərəl 字面意义的;缺乏想象力的;完全按原文的;】 Character Set and Collation Every character string literal has a character set and a collati 阅读全文
posted @ 2024-04-13 11:56 东山絮柳仔 阅读(63) 评论(0) 推荐(0) 编辑
摘要:MySQL includes character【ˈkærəktər 字母,符号;】 set support that enables you to store data using a variety【vəˈraɪəti (同一事物的)不同种类,多种式样;变化;(植物、语言等的)变种,变体;多样化 阅读全文
posted @ 2024-04-12 23:06 东山絮柳仔 阅读(35) 评论(0) 推荐(0) 编辑
摘要:1.NUll值 The NULL value can be surprising until you get used to it. Conceptually【kənˈsɛptʃuəli 概念;观念上;概念上;在概念上;概念地;】, NULL means “a missing unknown val 阅读全文
posted @ 2024-04-11 22:27 东山絮柳仔 阅读(35) 评论(0) 推荐(0) 编辑
摘要:1.age 与 出生日期 为什么设计的时候,存放的是出生日期而不是年龄呢?这个问题简单,细想很有意思,也包含着智慧,来自生产生活的思考。下面的解释很到位。 How about age? That might be of interest, but it is not a good thing to 阅读全文
posted @ 2024-04-11 16:38 东山絮柳仔 阅读(37) 评论(0) 推荐(0) 编辑
摘要:1. InnoDB INFORMATION_SCHEMA FULLTEXT Index Tables The following tables provide metadata for FULLTEXT indexes: mysql> SHOW TABLES FROM INFORMATION_SCH 阅读全文
posted @ 2024-04-09 23:16 东山絮柳仔 阅读(49) 评论(0) 推荐(0) 编辑
摘要:1.概述 This section provides information and usage【ˈjuːsɪdʒ 使用;(词语的)用法,惯用法;利用;利用率;】 examples for InnoDB INFORMATION_SCHEMA tables. InnoDB INFORMATION_SC 阅读全文
posted @ 2024-04-08 23:03 东山絮柳仔 阅读(36) 评论(0) 推荐(0) 编辑
摘要:1.Online DDL Space Requirements Disk space requirements for online DDL operations are outlined【ˈaʊtlaɪnd 概述;略述;显示…的轮廓;勾勒…的外形;】 below. The requirements 阅读全文
posted @ 2024-04-07 21:24 东山絮柳仔 阅读(38) 评论(0) 推荐(0) 编辑
摘要:1. Foreign Key Operations The following table provides an overview of online DDL support for foreign key operations. An asterisk【ˈæstərɪsk 星号(置于词语旁以引起 阅读全文
posted @ 2024-04-07 00:40 东山絮柳仔 阅读(50) 评论(0) 推荐(0) 编辑
摘要:1. Column Operations The following table provides an overview of online DDL support for column operations. An asterisk indicates additional informatio 阅读全文
posted @ 2024-04-01 23:31 东山絮柳仔 阅读(108) 评论(0) 推荐(0) 编辑

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