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ABOUT ME

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WHAT YOU NEED Laptop or Computer RDBMS Installed

MySQL PostgreSQL Oracle Whatever....

SQL Interface HeidiSQL SQLyog phpMyAdmin Whatever.....

Your Brain

BRAIN GYM

ARE YOU READY ?

HISTORY

IBM Research for System R SEQUEL Relational Software Inc. developed their

own version Oracle v2 (1979) IBM released DB2 based on System R

(1983) Becoming Standard

ANSI SQL-86 ANSI SQL-92

RULE OF THUMB

From Tom Kyte, Oracle Evangelist1. Use single SQL statement

whenever possible2. Use PL/SQL or Stored Procedure3. Use Java (or other programming

language)4. Rethink why you want to do it

(refine your approach)

SQL ANATOMY

Statements Queries Clauses Predicates Expressions

SELECTSELECT b,d,e,h

FROM some_table ;

SELECT *

FROM some_table

WHERE x IN (3,5,6,8) ;

SELECT b,d,e,h

FROM some_table

WHERE x IN (3,5,6,8) ;

JOIN VS UNION

JOIN UNION (UNION ALL)

JOIN

INNER JOIN (JOIN) LEFT OUTER JOIN (LEFT JOIN) RIGHT OUTER JOIN (RIGHT JOIN) FULL OUTER JOIN (FULL JOIN)  LEFT JOIN EXCLUDING INNER JOIN (LEFT

EXCLUDING JOIN) RIGHT JOIN EXCLUDING INNER JOIN (RIGHT

EXCLUDING JOIN) OUTER JOIN EXCLUDING INNER JOIN (OUTER

EXCLUDING JOIN)

VISUAL REPRESENTATION

SOME LOGIC

3VL (3 Value Logic) Conditional Expression

True False Null

CASE (ANSI) COALESCE (ANSI) DECODE (Oracle) IFNULL (MySQL) ISNULL (SQL Server)

AGGREGATES

SUM() COUNT() MAX() MIN() AVG() CROSS TABS

ANALYTIC FUNCTIONS

ROW_NUMBER() OVER() SUM() OVER() COUNT() OVER() MAX() OVER() MIN() OVER() AVG() OVER()

TRIGGERS & STORED PROCEDURES When to Use? How to Use?

TUNING

Optimizing Queries Optimizing Index Optimizing Server

THANK YOUQuestions and Answers