framework/db/conditions/BetweenColumnsConditionBuilder.php
public function build(ExpressionInterface $expression, array &$params = [])
    {
        $operator = $expression->getOperator();

        $startColumn = $this->escapeColumnName($expression->getIntervalStartColumn(), $params);
        $endColumn = $this->escapeColumnName($expression->getIntervalEndColumn(), $params);
        $value = $this->createPlaceholder($expression->getValue(), $params);

        return "$value $operator $startColumn AND $endColumn";
    }
public function build(ExpressionInterface $expression, array &$params = [])
    {
        $operator = $expression->getOperator();

        $startColumn = $this->escapeColumnName($expression->getIntervalStartColumn(), $params);
        $endColumn = $this->escapeColumnName($expression->getIntervalEndColumn(), $params);
        $value = $this->createPlaceholder($expression->getValue(), $params);

        return "$value $operator $startColumn AND $endColumn";
    }
Method builds the raw SQL from the $expression that will not be additionally
escaped or quoted.

@param ExpressionInterface|BetweenColumnsCondition $expression the expression to be built.
@param array $params the binding parameters.
@return string the raw SQL that will not be additionally escaped or quoted.