[Decid] INTEGER (+) not NULL PRIMARY KEY on CONFLICT FAIL,The on conflict clause is not a standalone SQL command. This is a non-standard clause that can appear in many other SQL commands. Since it is not a standard SQL language, it is described here
In the last note, a sqlite executable was generated, and the CD is executed under the directory where SQLite is located:Sqlite3 mydatabase.dbA database called mydatabase.db is created, and a file called Mydatabase.db is generated below the current
The first way is to open the registry--run---input regedit
Open Directory: Hkey_current_user\sharpplus\sqlitedev find the StartDate item on the right, delete it.
The second method is simpler, start-and-run-->cmd, or the WINDOW+R key
Today began to learn the knowledge of the database, because I am engaged in the development of embedded software, so in the selection of the database was determined to choose SQLite, on the Internet to search the relevant information and
1. Phenomenon:. Create a database,Solution: Test project Baoming end in DB, re-create the project to dbtest it's all right.2. Create a database, but there are no table entries in the databaseSolve:Db.execsql ("CREATE TABLE" + Table_news_name + "(" +
SQLite is a lightweight relational database, it is because of its small, mobile platform is widely used, but not suitable for processing large amounts of data and bulk operations. Its bottom layer is written in C, originally designed to be used in
SQLite, is a lightweight database, is to adhere to the Acid relational database management system, its design goals are embedded, and has been used in many embedded products, it occupies very low resources, in embedded devices, may only need
use of the limit of SQLite If I want to fetch 11-20 of the Account table data, then: Select * from the person Limit 9 Offset 10;Represents getting data from the person table, skipping 10 rows, and fetching 9 rows. You can also write select * from
1. Refer to SQLite ADO by add references. NET installation directory in the bin directory of the System.Data.SQLite.DLL.2, create the database file: Because it is always a 0-byte file, you should use IO can also (?!).
SQLite only supports part of the ALTER TABLE statement, we can change the name of a table with the ALTER TABLE statement, or we can add a field (column) to the table, but we cannot delete an existing field, or change the name of an existing field,
such a simple thing must let online a bunch of so-called tutorial to get confused, the harm I toss half a day! Write a note for yourself. with PDO (PDO support database porting, if your deployment will have multiple databases in the future, then
Using System.data.sqlite:http://system.data.sqlite.org/index.html/doc/trunk/www/downloads.wikiGet System.Data.SQLite.dll added to the project reference;Build tables, insert operationsC # code
static void Main (string[] args)
{
1. Refer to SQLite ADO by add references. NET installation directory in the bin directory of the System.Data.SQLite.DLL.2, create the database file: Because it is always a 0-byte file, you should use IO can also (?!).
/** * */Package Com.nyist.sqlitedemo;import Java.sql.connection;import java.sql.drivermanager;import Java.sql.resultset;import Java.sql.sqlexception;import java.sql.Statement;/** * @author Yuchao * * @school application and development of mobile
1. Open the Databaseint Sqlite3_open (const char *filename,//file path for databaseSqlite3 **ppdb//DB instance);2. Execute any SQL statementint Sqlite3_exec (sqlite3*,//an open DB instanceconst char *sql,//SQL statement to executeInt (*callback)
ALTER Table statement:ALTER TABLESql-statement:: = ALTER TABLE [database-name.] Table-name AlterationAlteration:: = RENAME to New-table-nameAlteration:: = ADD [COLUMN] Column-defThe RENAME to syntax is used to rename the table name [Database-name.]
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