A detailed description of storage requirements

Python comes with a lightweight relational database, SQLite. This database uses the SQL language. As a back-end database, SQLite can be used with Python to build websites or to create tools with data storage requirements. SQLite also has a wide range of applications in other fields, such as HTML5 and mobile. The sqlite3 in the Python standard library provides an interface to the database. I will create a simple relational database that stores the classification and price of books for a bookstore. The database contains two tables: category is used for record classification, and book is used to record the information of a certain books. A book belongs to a category, so there is a foreign key (foreign key), which points to the primary key ID of the Catogory table. Create a database I'll start by creating the database and the tables in the database. After connecting to the database using connect (), I can execute the SQL command by locating the pointer cursor: # by Vameiimport sqlite3# test.db&nbsp

1. Detailed Python database Sqlite3 application method

Summary: Python comes with a lightweight relational database, SQLite. This database uses the SQL language. As a back-end database, SQLite can be used with Python to build websites or to create tools with data storage requirements. SQLite also has a wide range of applications in other fields, such as HTML5 and mobile. The sqlite3 in the Python standard library provides an interface to the database. I will create a simple relational database for

2. mysql Basic tutorial 4-data type storage requirements and how to choose the right type

Introduction: 1. Column type storage requirements The storage requirements for each column type supported by MySQL are listed by category. The maximum size of a row in a MyISAM table is 65,534 bytes. Each blob and text column account accounts for only 5 to 9 bytes. If the MyISAM table package ...

3. mysql data type storage requirements and how to choose the right type

Summary: The maximum size of a row in a MyISAM table is 65,534 bytes. Each blob and text column account accounts for only 5 to 9 bytes. If the MyISAM table includes variable-length column types, the record format is also variable length. When you create a table, under certain conditions, MySQL can change a column from a variable-length type to a fixed-size type or vice-versa.

4. Python standard library 14 database (SQLITE3)

Summary: Python comes with a lightweight relational database, SQLite. This database uses the SQL language. As a back-end database, SQLite can be used with Python to build websites or to create tools with data storage requirements. SQLite also has a wide range of applications in other fields, such as HTML5 and mobile. The sqlite3 in the Python standard library provides an interface to the database.

5. More detailed MySQL field type description

Summary: MySQL supports a large number of column types, which can be divided into 3 categories: numeric type, date and time type, and string (character) type. This section first gives an overview of the available types, summarizes the storage requirements for each column type, and then provides a more detailed description of the nature of the types in each class. Overview intentionally simplified, more detailed description should take into account about specific column types

6. Make full use of DB2 9.7 data deduplication Device support

Summary: Deduplication can significantly improve your database environment by minimizing storage requirements, accelerating backup and recovery, and reducing network traffic. However, before publishing DB2 v9.7 Fixpack 3, if you need to optimize DB2 backup images for deduplication devices, you must set up multiple backup DATABASE command options appropriately. Otherwise, the backup target's heavy

7. Redis Research (i)-Introduction

Summary: Redis is an open source high-performance key pair database. It adapts to the storage requirements of different scenarios by providing multiple key data types, and uses many high-level interfaces to make them capable of different roles such as caching, queue systems, and so on. 1.1 History and Development 2008, Salvatore Sanfilippo, founder of Merzia, a start-up company in Italy, to avoid MySQL

8. mysql data type and usage

Introduction: Welcome to the Linux Community forum, interact with 2 million technicians >> enter MySQL support for multiple column types: numeric type, date/time type, and string (character) type. This chapter begins with an overview of these column types, and then describes in more detail the types of columns and the summary of storage requirements for column types. The overview is simple. About specific column types

9. MySQL Field type description _mysql

Summary: MySQL supports a large number of column types, which can be divided into 3 categories: numeric type, date and time type, and string (character) type. This section first gives an overview of the available types, summarizes the storage requirements for each column type, and then provides a more detailed description of the nature of the types in each class. An overview is intentionally simplified, and more detailed instructions should take into account additional letters about specific column types