create if not exists sqlite

From: http://blog.csdn.net/LocalVar/archive/2008/02/13/3620555.aspx  1. Introduction An important feature of a database that supports transactions like SQLITE is "Atomic commit ". Atomic commit means that all modification actions in a transaction

First, create the data table: The syntax rules and usage of this command are essentially the same as most relational databases, so we illustrate the various rules for creating tables in SQLite. However, for some sqlite-specific rules, we will give

Comprehensive Sqlite Learning (2) and sqlite Learning Finally, CSDN was chosen to sort out the knowledge points published over the past few years. This article was migrated to CSDN in parallel. Because CSDN also supports the MarkDown syntax, it's

1. Create a data table: The syntax rules and usage of this command are basically the same as those of most relational databases. Therefore, we use examples to demonstrate the rules for creating tables in SQLite. However, we will provide additional

In the Android development environment, ADB is our most frequently used debugging tool for Android development, and its use is of course what our Android developers have to master.ADB overviewAndroid Debug Bridge,android Debug Bridge, abbreviated as

Hello everyone, today I will introduce the knowledge of SQLite and use Java to perform operations on the SQLite database. SQLite is an open source embedded database engine written by D. Richard hipp in C language. It supports most sql92 standards

1.0 Introduction The task of the Query planner is to find the best algorithm or to say "query plan" to complete an SQL statement. As early as SQLite version 3.8.0, the component of the query planner has been rewritten so that it can run faster and

Hello everyone, today to introduce the relevant knowledge of SQLite, and combined with Java to implement the operation of the SQLite database.SQLite is an open source embedded database engine written by D.richard Hipp in C language. It supports most

SQLite database management commands 1. Create a database Start the command line and run the following command to open the shell mode CLP: Sqlite3 test. DB Although we provide the database name, if the database does not exist, SQLite does not

SQLite is an open source embedded database engine written by D.richard Hipp in C language. It supports most of the SQL92 standards and can be run on all major operating systems.SQLite consists of the following sections: SQL compiler, Kernel, backend,