- As a developer, it is important to understand MySQL's storage engines, data types, indexing, and normalization to build high-performing applications. - MySQL has several storage engines that handle different table types differently in terms of transactions, locking, storage, and memory usage. Choosing the right engine depends on data usage. - Properly normalizing data, using optimal data types, and adding indexes improves performance by reducing storage needs, memory usage, and speeding up queries.

1. know more about MySQL open source database MySQL: Open Source Database 1 Salaria Software Services

2. Storage engines Schema Normalization Data types Indexes Know more about your SQL queries - Using EXPLAIN Character set and Collation Resources 2 Salaria Software Services Outline

4. than try to fix a slow one after the fact!3 Salaria Software Services Why is it significant for a developerto know MySQL?

8. Is the data constantly changing?

9. Is the data mostly logs (INSERTs)?

10. requirements for reports?

11. need for transaction control?7 Salaria Software Services So…

14. Web, data warehousing, logging, auditing8 Salaria Software Services MyISAM Pluggable Storage engine

18. "lookup" tables,

19. calculated table counts,

20. for caching, temporary tables10 Salaria Software Services Memory Engine

22. Data that can never be updated11 Salaria Software Services Archive engine

26. Only store related data in a table

27. reduces database size and errors15 Salaria Software Services Goal of Normalization

30. Cache selected columns in memory table17 Salaria Software Services taking normalization way too far

32. Especially for indexed fields18 Salaria Software Services Data Types: Smaller, smaller, smaller

41. only if there is good selectivity:– % of distinct values in a column • But... each index will slow down INSERT, UPDATE, and DELETE operations 23 Salaria Software Services Indexes

46. Compare strings using a variety of collations

47. Mix strings with different character sets or collations in the same server, the same database, or even the same table

48. Allow specification of character set and collation at any level - Mysql > SET NAMES 'utf8'; - Mysql > SHOW CHARACTER SET 28 Salaria Software Services Character set and Collation

49. Two different character sets cannot have the same collation. Each character set has one collation that is the default collation. For example, the default collation for latin1 is latin1_swedish_ci. The output for “SHOW CHARACTER SET” indicates which collation is the default for each displayed character set. There is a convention for collation names: They start with the name of the character set with which they are associated, they usually include a language name, and they end with _ci (case insensitive), _cs (case sensitive), or _bin (binary). 29 Salaria Software Services Collations have these general characteristics

50. <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <?phpmysql_query('SET NAMES utf8'); ?> CREATE DATABASE mydatabase DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci; CREATE TABLE mytable ( mydata VARCHAR(128) NOT NULL) ENGINE=MyISAM DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci; 30 Salaria Software Services How to handle Unicode (UTF-8)

51. MySQL Forge and the Forge Wiki http://forge.mysql.com/ Planet MySQL http://planetmysql.org/ MySQLDevZone http://dev.mysql.com/ High Performance MySQL book 31 Salaria Software Services Resources

52. ? Open Questions 32 Salaria Software Services

53. Salaria Software Services 33 Thanks and Regards Mahesh Salaria mahesh@salaria.net Salaria Software Services http://salariasoft.com