Data manipulation: INSERT, UPDATE and DELETE

With UltraLite, you can perform SQL Data Manipulation Language operations and DDL operations. These operations are performed using the ExecuteStatement method, a member of the PreparedStatement class.

For more information the PreparedStatement class, see PreparedStatement class.

Parameter markers in prepared statements

UltraLite handles variable values using the ? parameter marker. For any INSERT, UPDATE or DELETE, each ? is referenced according to its ordinal position in the prepared statement. For example, the first ? is referred to as 1, and the second as 2.

To insert a row

Declare a PreparedStatement object.
var PrepStmt;

Assign an INSERT statement to your prepared statement object. In the following, TableName and ColumnName are the names of a table and column.

PrepStmt = conn.prepareStatement( 
    "INSERT into TableName(ColumnName) values (?)", null );

The null parameter indicates that the statement has no persistent name.

Assign parameter values to the statement.

var NewValue;
NewValue = "Bob";
PrepStmt.setStringParameter(1, NewValue);

Execute the statement.
PrepStmt.executeStatement( null );

To update a row

Declare a PreparedStatement object.
var PrepStmt;

Assign an UPDATE statement to your prepared statement object. In the following, TableName and ColumnName are the names of a table and column.

PrepStmt = conn.prepareStatement(
  "UPDATE TableName SET ColumnName = ? WHERE ID = ?", null);

The null parameter indicates that the statement has no persistent name.

Assign parameter values to the statement using methods appropriate for the data type.

var NewValue;
NewValue = "Bob";
PrepStmt.setStringParameter(1, NewValue);
PrepStmt.setIntParameter(2, 6);

Execute the statement
PrepStmt.executeStatement( );

To delete a row

Declare a PreparedStatement object.
var PrepStmt;

Assign a DELETE statement to your prepared statement object.

PrepStmt = conn.prepareStatement(
    "DELETE FROM customer WHERE ID = ?", null );

The null parameter indicates that the statement has no persistent name.

Assign parameter values for the statement.

var IDValue;
IDValue = 6;
PrepStmt.setIntParameter( 1, IDValue );

Execute the statement.
PrepStmt.executeStatement( );

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