sqlite vacuum example

The vacuum command is an extended function of SQLite. It imitates the same commands in PostgreSQL. If VACUUM is called with a table name or index name, the table or index will be sorted. In SQLite 1.0, the VACUUM command calls gdbm_reorganize () to sort back-end database fil

Label:Delete all data from the table:DELETE from [Name]When a large amount of data has been deleted in SQLite, the size of the database file remains the same. The reason: After deleting data from SQLite, unused disk space is added to an intrinsic "free list" to store the data you insert next. Disk space is not lost. However, it does not return disk space to the operating system.There are two ways to solve t

PHP + sqlite database operation example (create open insert search), sqlite example. PHP + sqlite database operation example (create open insert search), sqlite

SQLite tutorial (14): C language programming example code (2), sqlite programming example 3. Efficient batch data insertion: Before giving the operation steps, let's briefly describe the concept of batch insert to help you read the subsequent sample code. In fact, batch insert is not a new concept. It is supported in t

Simple PHP-implemented SQLite database class and usage example, sqlite example This article provides examples of simple PHP operations on SQLite database classes and usage. We will share this with you for your reference. The details are as follows:

Php+sqlite Database Operations Example (create/Open/insert/retrieve), sqlite example This article describes the methods of Php+sqlite database operations. Share to everyone for your reference, as follows: SQLite is a lightweight

PHP + sqlite database operation example (Create/Open/insert/search), sqlite example This article describes how to operate a PHP + sqlite database. We will share this with you for your reference. The details are as follows: SQLite

SQLite tutorial (13): C language programming example code (1), sqlite programming example 1. Get the table Schema information: 1) dynamically create a table. 2) obtain the table field information, such as the number of fields and the type of each field, based on the API provided by sqlite3. 3). Delete the table. See th

I recently learned about SQLite. After reading some documents, I wrote an example. It may be useful for beginners of SQLite or learning to insert images into the database. I will release the source code for reference. You are also welcome to make suggestions.It contains common SQL operations, including addition, deletion, modification, and query. It is also descr

Android SQLite database use example, androidsqlite For a brief introduction, mainstream mobile devices such as Android and iPhone all use SQLite as the storage engine for complex data. When we develop applications for mobile devices, we may need to use SQLite to store a large amount of data, so we need to master the

SQLite introduces SQLite as a very popular embedded database. It supports the SQL language and has good performance only by using a small amount of memory. In addition, it is open-source and can be used by anyone.SQLite consists of the following components: SQL Compiler, kernel, backend, and attachment. SQLite makes debugging, modification, and expansion of

Android SQLite database usage example For a brief introduction, mainstream mobile devices such as Android and iPhone all use SQLite as the storage engine for complex data. When we develop applications for mobile devices, we may need to use SQLite to store a large amount of data, so we need to master the

type ". However, there is a special case, if the integer PRIMARY KEY, then the other type will not be converted, will be reported a "datatype Missmatch" error.In summary, SQLite supports NULL, Integer, REAL, text, and BLOB data types, representing null values, integer values, floating-point values, string literals, and binary objects, respectively.SQLite also includes the following features:1. SQLite3 supports NULL, INTEGER, REAL (floating point numb

PHP Configuration SQLite Database Development Example Baidu Search Download Sqlitemanager tool PHP5 already bound SQLite1. Manually added PHP PDO driver extension support, added in php.ini Extension=php_pdo.dllExtension=php_pdo_sqlite.dllExtension=php_sqlite.dll Extension_dir = "C:\Program files\apache group\php5\ext" 2, in C:\Program Files\apache group\php5\ext guarantee has Php_sqlite.dll,php_pdo_sqlite.

This article mainly introduces the method of Php+sqlite database operation, simple analysis of the functions of SQLite database and related operation skills, including creating, opening, inserting, retrieving and error hints, and so on, need friends can refer to the next This article describes the methods of Php+sqlite database operations. Share to everyone for

This article mainly introduces the method of Php+sqlite database operation, simple analysis of the functions of SQLite database and related operation skills, including creating, opening, inserting, retrieving and error hints, and so on, need friends can refer to the next Specific as follows: SQLite is a lightweight database, it is designed to be embedded, and ha

Tags: blog a database get connected for imp. EXE transaction OneSQLite is an embedded database, and its database is a file. Python has built-in SQLite3, so using SQLite in Python does not require anything to be installed and used directly. Operation relational database, first need to connect to the database, a database connection is called connection; After connecting to the database, you need to open the cursor, called the cursor, execute the SQL sta

A few days ago, I just created a Lazarus +The SQLite example is not very good. The main reason is that the interface is not very integrated with mobile, and I often encounter crashes orProgramExit unexpectedlyNow we have made a Lazarus + kolce+ The SQLite example is much better than the previous one. Now let's share it

The example of this article describes the method of Php+sqlite database operation. Share to everyone for your reference, specific as follows: SQLite is a lightweight database, its design goal is embedded, and has been used in many embedded products, it occupies very low resources, in embedded devices, may only need hundreds of K of memory is enough. It can suppo

not try again, should also be able, write finish again.The second option is to use Database.connection to set the connection string, as follows: Public Mydbcontext (string connection) { = getsqlitestring (connection); }Here does not call the method inside the base, for Mysqlite,getsqlitestring as follows: Private string Getsqlitestring (string Connect) { return"Data source=" + connect; }This will enable the operation of the ConnectionSt