学习笔记之Database / SQL

SQL@Wiki 

• http://en.wikipedia.org/wiki/SQL

面试总结之Database - 浩然119 - 博客园

• http://www.javashuo.com/article/p-pkgajdvv-bc.html

学习笔记之MySQL - 浩然119 - 博客园

• http://www.javashuo.com/article/p-rxjoriyi-dh.html

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DATABASE

一篇文章，掌握全部开源数据库的现状 - AI前线

• https://mp.weixin.qq.com/s?__biz=MzU1NDA4NjU2MA==&mid=2247486485&idx=1&sn=d874ff7d57fc8c7ea594c946811c0859&source=41#wechat_redirect

数据库两个神器索引和锁 - 数据库开发

• https://mp.weixin.qq.com/s/oIzMlR3i7kdRTc3Wvuskiw
• 1、索引
  • 1.1聊聊索引的基础知识
  • 1.2索引提升检索速度
  • 1.3索引下降增删改的速度
  • 1.4哈希索引
  • 1.5InnoDB支持哈希索引吗？
  • 1.6汇集和非汇集索引
  • 1.7索引最左匹配原则
  • 1.8=、in自动优化顺序
  • 1.9索引总结
  • 2、锁
  • 2.1为何须要学习数据库锁知识
  • 2.2表锁简单介绍
  • 2.2行锁细讲
    • 2.2.1MVCC和事务的隔离级别
  • 2.3乐观锁和悲观锁
    • 2.3.1悲观锁
    • 2.3.2乐观锁
  • 2.4间隙锁GAP
  • 2.5死锁
  • 2.6锁总结
• 3、总结

用NoSQL给高并发系统加速

• https://mp.weixin.qq.com/s/_PrVqB5obElUY-jwHeKD3g

聊一聊数据库中的锁

• https://mp.weixin.qq.com/s/YRPbarXYL1XPRaTCBFtlyA
• http://www.javashuo.com/article/p-otjcasbz-du.html

MongoDB、Cassandra 和 HBase 三种 NoSQL 数据库比较

• https://mp.weixin.qq.com/s?__biz=MzI3NDA4OTk1OQ==&mid=2649902917&idx=2&sn=ff5551930552631a8fd0ef9c3b691023&chksm=f31fbdcdc46834db5aad6f8cb398ae077c5394a4aa1866b3c3d379bd0a269459f7d8b67a44fd&mpshare=1&scene=24&srcid=0909wT32FfQlx4cKzsf7wWFX&sharer_sharetime=1568010171762&sharer_shareid=5ed4a849fa42d9599a974fa8eb45e8fa&key=b1719993cc296ec459076060de913d620c4d611bfc8e6ece1dcab94d013eb335b099218abe49701a87aad489257fb559c7393d660715487c5e7f5321c3cd9f7108033b0fb032a860c43b3cf976c3cea1&ascene=14&uin=MTMzMzc3MjY4MQ%3D%3D&devicetype=Windows+10&version=62060833&lang=en&pass_ticket=tT3maEfznKd3xtVT4L8%2Bl%2B2KKdhrJZ3ERaWEoIpqIMB2I2ssKo%2BTfx0v80L7rMTL

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SQL

Delete (SQL)@Wiki

• http://en.wikipedia.org/wiki/Delete_%28SQL%29

Insert (SQL)@Wiki

• http://en.wikipedia.org/wiki/Insert_%28SQL%29

in和exists的区别与SQL执行效率分析

• http://www.cnblogs.com/diction/archive/2008/01/18/1043844.html

DB2 基础: 在 DB2 Universal Database 中建立第一个触发器

• https://www.ibm.com/developerworks/cn/data/library/techarticles/0308bhogal/0308bhogal.html

DB2 Locking and Concurrency for Java Developers

• https://www.mcpressonline.com/programming-other/java/db2-locking-and-concurrency-for-java-developers

Dimension (data warehouse) - Wikipedia

• https://en.wikipedia.org/wiki/Dimension_(data_warehouse)#Dimension_table

Execute Dynamic SQL commands in SQL Server

• https://www.mssqltips.com/sqlservertip/1160/execute-dynamic-sql-commands-in-sql-server/

Database index - Wikipedia

• https://en.wikipedia.org/wiki/Database_index#Bitmap_index

power designer_百度百科

• https://baike.baidu.com/item/power%20designer/2482290?fromtitle=PowerDesigner&fromid=5408320

SELECT INTO 和 INSERT INTO SELECT 两种表复制语句 - 陈晨 - 博客园

• http://www.cnblogs.com/freshman0216/archive/2008/08/15/1268316.html

sql 语句中commit的做用_百度知道

• https://zhidao.baidu.com/question/219723307.html

SQL：char、varchar、text和nchar、nvarchar、ntext的区别 - Yes!加菲猫 - 博客园

• http://www.cnblogs.com/TomToDo/archive/2008/05/27/1208496.html

sprintf_百度百科

• https://baike.baidu.com/item/sprintf?fr=aladdin

update select - 通心菜 - 博客园

• http://www.cnblogs.com/jcgh/archive/2010/10/19/1855446.html

Difference between Open SQL and Native SQL | ABAP | STechies

• https://www.stechies.com/what-is-difference-between-open-sql-native-sql/

SQL 性能优化梳理

• https://mp.weixin.qq.com/s/RSJ--Hq2eenZzG3HKPXwtw
• http://www.javashuo.com/article/p-kcreieav-bc.html

实用排坑帖：SQL语句性能优化操做策略大全

• https://mp.weixin.qq.com/s/1zloj8ibi0-AIFXjsLmzbg

如何去写一手好SQL？

• https://mp.weixin.qq.com/s/lheigcFtRIjDfqM37uNDFQ
• http://www.javashuo.com/article/p-zvevisxl-mc.html

这两个小技巧，让SQL语句不只躲了坑，还提高了 1000 倍

• https://mp.weixin.qq.com/s/4cfBY7--KYcf2sRs3tZRQw

一波操做，我把 SQL 执行效率提升了 10,000,000 倍！

• https://mp.weixin.qq.com/s/TaiSl7eNLcz7OrmO1okFxw

10个SQL技巧

• https://mp.weixin.qq.com/s/txbusDvTKwFZdX94kDp7VQ

在工做中经常使用到的SQL

• https://mp.weixin.qq.com/s/2OtfnWseDyxQ5kHKVSnoeA

不会SQL注入，连漫画都看不懂了

• https://mp.weixin.qq.com/s/qwp6dlHPeb-yRfUPncnieA

这句简单的sql，如何加索引？

• https://mp.weixin.qq.com/s/LFe6Hq6_1_bNx0Hqhfi8-g

记一次神奇的SQL查询经历，group by慢查询优化

• https://mp.weixin.qq.com/s/PUNxYTK7l8pzKJvwVC2Btw
• http://www.javashuo.com/article/p-clwkajjt-ks.html

阿里规范不建议多表join，可这SQL要怎么写啊？

• https://mp.weixin.qq.com/s/dSG-AqgfYwbi40GqilrtyA
• https://www.zhihu.com/question/56236190/answer/153450286

count(1)、count(*) 与 count(列名) 的执行区别

• https://mp.weixin.qq.com/s/K0LlJ5QW0uw3w0ODqhoKTQ
• https://blog.csdn.net/iFuMI/article/details/77920767

数据库不推荐使用外键的9个理由

• https://mp.weixin.qq.com/s/bxdBfAdV30EGEWkw7Q4vPA
• https://www.jdon.com/49188