In Android Linux, the procedure for calling the SQLite database is as follows:
1. First, run find./-name libsqlite. So-print in the android directory to find out whether any library files supported by SQLite are available;
2. Add a reference to
1. Whether the database executing the insert statement is the database you are viewing. SQLite databases are file-type databases. It is easy to operate the database and view the Database Inconsistency. 2. If a transaction is used, no transaction is
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Problem
Solution
Detailed description
Code
Problem
When the air application is executedProgramIn this case, we connect to the database file and create the same table. Solution
To solve this problem,
SQLite architecture:
SQLite is composed of interfaces, compilers, virtual machines, and backend servers.Program(Back end.
Two other architecture diagrams are relatively simple:
Interface ):
It is composed of SQLite C APIs.
1. MOBILE/data/ApplicationsProgramCreate a database under the package name/directory
If the size of the created database is small, you can use the sqliteopenhelper class that comes with Android to directly generate the database on the mobile phone
SQLite is a lightweight database. Today, we have basically mastered how to use C # To operate SQLite databases. Based on the experiences of netizens, there are at least two methods to call SQLite, one is to call sqlite3.dll and the other is to use
1.) do not reuse a parameter
2 .)Values (@ STR, @ new) parametername = "@ Str." parametername = "@ new ."AsThe error indicates, you are using the parameters @ STR and @ new andAdding two different parameters. Read the error message, it is
If the developer is not familiar with SQL syntax, Android sqlitedatabase provides addition, deletion, modification, and query statements to operate the database. Although Android provides these so-called "convenient" methods for operating the
Reprinting is also helpful. After reading this article, I understand, update
In addition to the execsql () and rawquery () methods described earlier, sqlitedatabase also provides operations corresponding to adding, deleting, updating, and
Since September August, I have been learning SQLite and preparing to read the source code.But I cannot understand it now,How can I learn SQLite well?Why should I read the source code? Why?How to read? What principles should we follow?What should I
SQLite Introduction
Lite refers to Lite version. As the name suggests, SQLite is a very, very small database, which can almost ignore the occupied space, but it provides a complete relational database function.
Use of SQLite
To access the SQLite
Recently, we are engaged in local SQLite queries. We need to query data within a certain period of time. In SQL, we all know that:
select * from tblName where rDate Between '2008-6-10' and '2008-6-12'
There is no problem in this way, but in SQLite
Recently, I took a small project in the United States. The main requirement is to combine the data exported from the disk (DBF format) with other data (CSV format) to generate a new data table, which facilitates query and error correction. The other
Recently I am looking at the source code of the Android platform. Next I will summarize the relationship between sqlitedatabase and its underlying sqllite database. How does the upper-layer sqlitedatabase call the underlying SQLite database
StatementYou are welcome to repost this article, but please respect the author's Labor achievements. repost this article and keep the statement in this box. Thank you.Article Source: http://blog.csdn.net/iukey
In the previous tutorial, we
First paste the introduction of Baidu Encyclopedia:
SQLite is a lightweight database and a relational database management system that complies with acid [1]. It is contained in a relatively small C library, unlike common customer-Server Examples,
The throwing of this exception does not cause the program to crash.
The exception information comes from the Finalize method of the sqlitedatabase class. From the exception information "close () was never explicitly called on database, application
SQLite Foreign keys FAQ: Can you show me how to defineForeign keysIn a SQLite database table design?
The SQLite database does supportForeign keys, And its foreign key syntax is similar to other databases. Here's a quick SQLite foreign key example.A
Lightweight database SQLite Installation and Use (1) SQLite introduction see Baidu Encyclopedia: http://baike.baidu.com/view/19310.htm Official Website: http://www.sqlite.org/(2) linux SQLite compilation and installation of sqlite-amalgamation-307090
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