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Delphi GUI Programming with FireMonkey

You're reading from   Delphi GUI Programming with FireMonkey Unleash the full potential of the FMX framework to build exciting cross-platform apps with Embarcadero Delphi

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Product type Paperback
Published in Oct 2020
Publisher Packt
ISBN-13 9781788624176
Length 546 pages
Edition 1st Edition
Languages
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Author (1):
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Andrea Magni Andrea Magni
Author Profile Icon Andrea Magni
Andrea Magni
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Table of Contents (18) Chapters Close

Preface 1. Section 1: Delphi GUI Programming Frameworks
2. Introducing the FireMonkey Framework FREE CHAPTER 3. Exploring Similarities and Differences with VCL 4. Section 2: The FMX Framework in Depth
5. Mastering Basic Components 6. Discovering Lists and Advanced Components 7. Using FireDAC in FMX Applications 8. Implementing Data Binding 9. Understanding FMX Style Concept 10. Divide and Conquer with TFrameStand 11. Building Responsive UIs 12. Orchestrating Transitions and Animations 13. Section 3: Pushing to The Top: Advanced Topics
14. Building Responsive Applications 15. Exploring Cross-Platform Services 16. Learning about FMX 3D Capabilities 17. Other Books You May Enjoy

Working with macros and parameters

While dealing with SQL statements, the complexity of these statements tends to grow. Aside from academic examples, the average SQL statement consists of a quite large fields list, some joins, filter criteria listed in the where clause, sorting, and possibly grouping.

For decades, in every programming forum I've been in, I have seen people manually concatenating SQL statements as strings in order to provide values for filter criteria or similar tasks. This is bad for a number of reasons, starting from some evident opening up to SQL injection vulnerabilities, down to possible performance penalties. However, basically, often there is the need to dynamically build (parts of) SQL statements, and FireDAC comes to the rescue with two handy functionalities: parameters and macros.

Parameters are quite a common feature among modern DBMSes and FireDAC correctly provides an interface to access them and populate them with values (as other DAC libraries do);...

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