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Oracle PL/SQL Best Practices: Write the Best PL/SQL Code of Your Life, Edition 2

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SQL in 10 Minutes, Sams Teach Yourself: Edition 4

Oracle Regular Expressions Pocket Reference: Tutorial & Quick Reference

SQL the One: Microsoft SQL Server Interview Guide

SQL Database Programming (Fifth Edition)

SQL Server 2012 T-SQL Recipes: A Problem-Solution Approach, Edition 3

Python and SQL Bible: From Beginner to World Expert: Unleash the true potential of data analysis and manipulation.

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Learning PHP and MySQL

Oracle PL/SQL Programming: Edition 4

Complete PL/SQL Book

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PHP & MySQL: The Missing Manual: Edition 2

XQuery: Search Across a Variety of XML Data, Edition 2

SQL Hacks: Tips & Tools for Digging Into Your Data

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The Art of SQL