sqlite on delete cascade

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

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

How to list all tables in a SQLite databaseThe information in the SQLite database exists in a built-in table sqlite_master that can be used in a querySELECT * from Sqlite_master to see if all table names are listed, just one statement:SELECT name

SQLite tutorial (III): Introduction to data tables and views, sqlite View 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

SQLite set Cascade Delete ()After Setup, manual deletion in the database management software is helpful. But using such a code delete is not valid: String sql = string. Format ("Delete from teaminfo Where teamname = ' {0} '", teamname);Need to

SQLite foreign KEY (Foreign key) supportFOREIGN KEY constraints are supported starting from SQLite 3.6.19. (The SQLite version of Ubuntu 10.04 is 3.6.22, and the SQLite version of Debian 6.0 is 3.7.0)A FOREIGN KEY constraint is used to enforce a

When you use the ActiveReports Report Designer to design a report template in a recent movable grid project , you encounter a multilevel classification challenge: You need to summarize the sales amounts for all sales and subordinates in a department.

Recently in the development of SQLite, the development environment is vs2010+ sqlite ADO data Provider. This Data provider program is based on the System.Data.SQLite 1.0.66 release, which summarizes the experience in developing SQLite.1. Program

public void OnCreate (Sqlitedatabase db) { //TODO auto-generated method stub String classessql = ' CREATE tabl E classes (class_id varchar () primary key, "+ " class_name varchar) "; String studentssql = "CREATE TABLE students" (

In the design of the OEA platform, multiple databases must be supported, including at least sqlserver, Oracle, and a single-host file database. We have not implemented this part before, but reserved many interfaces. It took one day yesterday to