1. Sqlite

  • 1.1. SQLite tutorial

    SQLite is a software library that implements a self-sufficient, serverless, zero-configuration, tra...
    2025-10-25 12:31:17 UTC
  • 1.2. Introduction to SQLite

    This tutorial helps you understand what SQLite is, how it differs from SQL, why it is needed, and how its application ...
    2025-10-25 12:31:13 UTC
  • 1.3. SQLite installation

    An important feature of SQLite is zero configuration, which means that there is no need for complex installation or ma...
    2025-10-25 12:31:10 UTC
  • 1.4. SQLite command

    This chapter will show you the simple but useful commands used by SQLite programmers. These commands are called SQLite...
    2025-10-25 12:31:15 UTC
  • 1.5. SQLite syntax

    SQLite follows a unique set of rules and guidelines called grammar. This tutorial lists all the basic SQLite syntax an...
    2025-10-25 12:31:11 UTC
  • 1.6. SQLite data type

    The SQLite data type is a property that specifies the data type of any object. Every column, variable, and expression ...
    2025-10-25 12:31:09 UTC
  • 1.7. SQLite creates a database

    SQLite’s sqlite3 Command is used to create a new SQLite database. You do not need any special permissio...
    2025-10-25 12:31:14 UTC
  • 1.8. SQLite attached database

    Suppose that when multiple databases are available at the same time, you want to use any of them. SQLite’s ATT...
    2025-10-25 12:31:10 UTC
  • 1.9. SQLite detach database

    SQLite’s DETACH DATABASE Statement is used to separate and detach a named database from a database conn...
    2025-10-25 12:31:18 UTC
  • 1.10. SQLite create table

    SQLite’s CREATE TABLE Statement is used to create a new table in any given database. Creating a basic t...
    2025-10-25 12:31:16 UTC
  • 1.11. SQLite delete table

    SQLite’s DROP TABLE Statement is used to delete the table definition and all related data, indexes, tri...
    2025-10-25 12:31:15 UTC
  • 1.12. SQLite Insert statement

    SQLite’s INSERT INTO Statement is used to add a new data row to a table in the database. ...
    2025-10-25 12:23:15 UTC
  • 1.13. SQLite Select statement

    SQLite’s SELECT Statement is used to get data from an SQLite database table and return it as a result t...
    2025-10-25 12:31:13 UTC
  • 1.14. SQLite operator

    1.14.1. What is the SQLite operator? ¶ Operator is a reserved word or c...
    2025-10-25 12:31:16 UTC
  • 1.15. SQLite expression

    Expressions are those of one or more values, operators, and calculated values SQL A combinat...
    2025-10-25 12:23:21 UTC
  • 1.16. SQLite Where clause

    SQLite’s WHERE Clause is used to specify the conditions for getting data from one or more tables. ...
    2025-10-25 12:31:13 UTC
Principles, Technologies, and Methods of Geographic Information Systems  102

In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.