First, storage types and data types:
SQLite the storage of data values into the following storage types:
Copy Code code as follows:
Null: Indicates that the value is a null value.
Integer: unsigned integer value.
Real:
SQLite Introduction
Before introducing System.Data.SQLite, you need to introduce Sqlite,sqlite is a stand-alone database management system similar to access, which keeps the definition of all databases (including definitions, tables, indexes, and
SQLite is a lightweight local file database and is a relational database management system that complies with acid. Its design goal is embedded, and has been used in many embedded products, it's powerful, fast, it occupies a very low resource, in
SQLite is an open source, embedded relational database, the first version of Alpha was released in 2000. SQLite has outstanding performance in portability, ease of use, compactness, efficiency and reliability.
The SQLite database created in Android
The SQLite database is a built-in database of Android, small and powerful enough to work with most SQL statements, while SQLite databases are just files. Although SQLite is a bit much, but not as powerful as the PC-side MySQL, and the Android system
For a long time did not calm down to write a blog, and now come back, is the Delphi continuous progress let me moved, excited.
Delphi XE5 merged into the FIREDAC, the first impression is very good, I am afraid dbexpress and so on to step aside.
Features of the SQLite databaseCharacteristics:1. Lightweight2. Independence, no reliance, no installation3. Isolation all in one folder system4. Cross-platform support for many operating systems5. Multi-lingual interface supports many programming
SqliteData TypeReference:SQLite Data Types | Beginner's TutorialHttp://www.runoob.com/sqlite/sqlite-data-types.htmlThe SQLite data type is a property that specifies the data type of any object. Each column in SQLite has an associated data type for
VS 2012 Defaults to SQLite's data Provider, so it is not possible to manage SQLite's database directly in VS 2012, and it is not natural to generate the model class of the Entity Framework directly in VS like SQL Server. In order to solve this
Download the source code package of two:Sqlite-dll-win32-x86-3081101.zip, which provides a file that exports sqlite3 functions sqlite3.defprimarily used to generate LIB file to determine the link usageSqlite-preprocessed-3081101.zip, provided source
SQLite tools I use the SQLiteStudio2.1.5 http://sqlitestudio.pl/?act=downloadSqlitestudio Open database file, click Tools-"Export, database, format Select SQL, export format options" selectionUse the SQL formatter to format exported SQL
To EF6 Code First mode support SQLite has a few steps:One, need to install Sqlite-netfx451-setup-bundle-x86-2013-1.0.92.0.exe to let vs add ado with SQLite optional1) go to Http://system.data.sqlite.org/index.html/doc/trunk/www/downloads.wiki to
Grdb using SQLite's Wal-mode Wal full name is the write Ahead Logging, which is a mechanism for implementing atomic transactions in SQLite. This mode was introduced from the SQLite 3.7.0 release. Before that, SQLite uses the rollback journal
SQLite supports 3 threading modes: Single thread : In this mode, there is no mutual exclusion, and multithreading is not safe to use. Disables all mutex locks, and errors occur when used concurrently. This is enabled when SQLite compiles with the
You can quickly complete the form design by pasting the following code directly onto a blank form:Object Dbgrid1:tdbgrid left = 0 Top = 0 Width = 265 Height = 338 Align = Alleft DataSource = DataSource1 TabOrder = 0 Titlefont.charset =
This content mainly explains in the Android development process, how to use the SQL statement to carry on the SQLite database operation.First, the introduction of the SQLite databaseThe Android system integrates a lightweight embedded
Last time I introduced you to the basic information and usage process of SQLite. I believe my friends have some knowledge about SQLite. Today, I will share with you how to use SQLite in Android.
Currently, mainstream mobile devices such as Android
1) how to create an auto-increment field?
A simple answer: a field declared as integer primary key will be automatically added.
Here is a detailed answer: Starting from SQLite 2.3.4, if you declare a field in a table as integer primaryKey, so no
SQLite 3 open-source Edition does not include the encryption function. It is unacceptable for a local database to have no encryption function. You only need to open the database with notepad to view the data saved in the database, security is more
Sqlite is a very small cross-platform embedded database, which does not provide encryption functions. However, the designer has obviously considered the encryption solution. We can find two reserved encryption ports in the source code: sqlite3_key
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