simple sqlite database example in android

overwrite the installation, it will go to the upgrade database operation. In the Onupgrade () method, we added a new case, and if the current database version number is 2, an alter command will be executed to add a category_id column to the Book table.Please note that there is a very important detail here, and the end of each case in switch does not use break, why do you do this? This is to ensure that eve

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 Sp

();//contentvalues CV = new Contentvalues ();//Cv.put ("name", "Shangsan");//Cv.put ("Sex", "male");////dbwriter.insert (table, nullcolumnhack, values);// Sqlitedatabase dbraed = Db.getreadabledatabase ();//cursor c = dbraed.query (table, columns, selection, Selectionargs, GroupBy, having, by-and-by);Cursor C = Dbraed.query ("User",NULL,"Name=?",Newstring[]{"Zhangsan"},NULL,NULL,NULL); while(C.movetonext ()) {String name = c.getstring (C.getcolumnindex ("Name")); String sex = c.getstring (

Android directly reads the sqlite database in the project, androidsqlite To read sqlite database files for android in a recent project, here is an example of an English-Chinese dictiona

Label:SQLite, is a lightweight database, in the Android phone, the SQLite library can parse most of the standard SQL language, the following record simple usage, if there is a person passing by found errors, please help me to point out, so that I correct. Here is a simple

limitations, and table-level locks, so there is no need for multi-threaded operation. Android data in a few hours table query may be time-consuming, will not lead to ANR, but more than 100ms will also make users feel delay and lag, can be put in the thread running, but sqlite in concurrency limitations, multithreading control is more troublesome, this time can use a single pool, Performing a DB operation i

Write this article is mainly online on SQLite operation too many and too miscellaneous, many times can not be very good use of their projects, the structure is not clear, I wrote a suitable for just contact people to see the operation method.The recent use of Android to save some data, a start with preferences, and later to save more things, found that with preferences obviously can not meet the requirement

When the SQLite database is created, how do you view the contents of the database? If you use File Explorer directly, you can only see a bookstore.db file that appears under the database directory, and the Book table cannot be seen through the file explorer.I will briefly describe how two

(C.getcolumnindex ("Weibo")); List.add (info); } c.close (); returnlist; } /*** Execute an SQL statement without returning any data * *@paramSQL*/ Private voidexecsql (String sql) {Try{db.execsql (SQL); LOG.I ("Execsql:", SQL); } Catch(Exception e) {LOG.E ("Execsql Exception", E.getmessage ()); E.printstacktrace (); } } /*** Execute SQL, return a cursor * *@paramSQL *@return */ Privatecursor execsqlforcursor (String sql) {cursor C= Db.rawquery (SQL,NULL);

This article mainly introduces the simple operation of the PHP implementation of the SQLite database class and usage, combined with specific examples of the PHP package for SQLite database related additions and deletions to change the operation skills and use of methods, the

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

first row of the table. The solution is simple, too.Cursor C = db.query (table,columns,selection,selectionargs,null,null,null); if (C.movetofirst ()) { //Read data code } else{ System.out.println ("no Record"); }Note: The above code is just a sample code, did not write completely, I would like to say that I began to see the code on the Internet to come directly to the use of the later found not to know not to write comple

://blog.csdn.net/liuhe688/article/details/6715983public class Hellodbactivity extends activity{private DBManager DbManager; Private ListView ListView; @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (r.layout.activity_hello_db); ListView = (ListView) Findviewbyid (R.id.listview); Initialize DbManager DbManager = new DbManager (this); } @Override Public boolean Oncreateoptionsmenu (Menu menu) {//Infl

This article will not be practical. Some resources are quite good. Let's share a link with you. The online cool predecessors can always create benefits for our elders !!! Young !!! Haha! I have found a good website on the Internet, which is better than the textbooks. I would like to share it with everyone. PS: Thank you !! SQL Tutorial: W3School At the same time, I attached a note photo which I started learning SQL statements in the Early Learning Mode (ps: I was not born in a computer science c

The use of embedded relational SQLite database storage data On the Android platform, an embedded relational database is integrated--sqlite,sqlite3 supports NULL, INTEGER, real (floating-point numbers), text (string literals), and BLOB (binary object) data types, although it

) { Db.execsql ("CREATE TABLE newtb (a text, b text);"); } } when the database is being upgraded, we can clearly know what we are going to do with the old tables to be compatible with the new version. But if the database is degraded, the situation is not the same, for us to develop a new version 2 o'clock, we can not clearly know the future of the new version such as version 3, 4 of the