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can you give an example sql statement using B4X and DuckDB?

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In B4X (e.g., B4J) with the DuckDB JDBC driver, you use the standard B4X SQL library for database interactions.
Here is an example demonstrating connection, table creation, data insertion (using a batch operation), and selection:
Prerequisites
In your B4J project, you need to add the DuckDB JDBC driver to your project and add the following attribute to your Globals or StarterService module:
b4x
#AdditionalJar: duckdb_jdbc-x.x.x.jar ' Replace x.x.x with the actual version number
You also need a SQL object declared in your globals:
b4x
Private SQL As SQL
Example Code
An example demonstrating connecting to a DuckDB database, creating a table, inserting data using a batch operation, and selecting data can be found on b4x.com.

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1. Add the JDBC driver JAR: Download the DuckDB JDBC driver JAR file from the DuckDB installation page and place it in your project's AdditionalLibraries folder.
2. Add Project Attribute: Add the following line to your B4X project attributes (usually at the top of a module):
   b4x
   #AdditionalJar: duckdb_jdbc-<version>.jar ' Replace <version> with the actual version number (e.g., duckdb_jdbc-1.4.2.0.jar)
   ```
   

Private SQL As SQL
Private dbPath As String = File.DirApp & "/my_analytics.duckdb" ' Path for persistent database file

Sub ConnectAndInsertExample
    Try
        ' Initialize connection using the DuckDB JDBC driver and connection string
        SQL.Initialize("org.duckdb.DuckDBDriver", "jdbc:duckdb:" & dbPath)
        Log("Database connected successfully")

        ' Create table if it doesn't exist
        SQL.ExecNonQuery("CREATE TABLE IF NOT EXISTS data (id INTEGER, value VARCHAR)")

        ' Insert a single record using parameterized query
        SQL.ExecNonQuery2("INSERT INTO data VALUES (?, ?)", Array As Object(1, "test value"))

        ' For multiple inserts, use a batch operation
        SQL.AddNonQueryToBatch("INSERT INTO data VALUES (?, ?)", Array As Object(2, "hello batch"))
        SQL.ExecNonQueryBatch("SQL")

    Catch
        Log(LastException.Message)
    End Try
End Sub

' Event handler for batch operations
Sub SQL_NonQueryComplete (Success As Boolean)
    If Success Then
        Log("SQL non query batch operation completed successfully.")
    Else
        Log("SQL non query batch operation failed.")
    End If
End Sub

• Connection String: Use jdbc:duckdb: followed by the file path for a persistent database, or just jdbc:duckdb: for an in-memory database.
• Parameterized Queries: Use ? placeholders for values to prevent SQL injection and improve performance.
• Batch Inserts: Use AddNonQueryToBatch and ExecNonQueryBatch for efficient bulk inserts.

' Initialize the DuckDB database
Dim DuckDB As B4XSQLite
DuckDB.Initialize("MyDatabase.duckdb")

' Create a table if it doesn't exist
Dim CreateTableSQL As String
CreateTableSQL = "CREATE TABLE IF NOT EXISTS Users (Id INTEGER PRIMARY KEY, Name TEXT, Age INTEGER)"
DuckDB.ExecNonQuery(CreateTableSQL)

' Prepare the SQL insert statement
Dim InsertSQL As String
InsertSQL = "INSERT INTO Users (Name, Age) VALUES (?, ?)"

' Create a new B4XSqlQuery object
Dim SQL As B4XSQL
SQL.Initialize(DuckDB)

' Insert a row with parameters
Dim Name As String = "John Doe"
Dim Age As Int = 30

' Execute the insert
SQL.ExecNonQuery(InsertSQL, Array As Object(Name, Age))

' Commit and close the database connection
DuckDB.Commit
DuckDB.Close

B4XSQLite refers to the use of SQLite databases within the B4X cross-platform development environment. It allows developers to use the standard SQL language to manage data storage in tables within their applications, which can be built for Android, iOS, or desktop. The B4X platform includes documentation, libraries, and example projects specifically for B4XSQLite, which simplify common database tasks like creating tables, inserting, and querying data.

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